论文检索

主页 | 软件工具 | 课题库 | 公众号
:



总访问量:1523910

总访客量:62184

关键词:
Organic Matter |
DOM |
POM |
Soil OM |
Sediment OM |
Organic Carbon |
Organic Nitrogen |
Biomarker |
Humic Substances |
Fulvic Substances |
Humins |
Biochar |
Black Carbon |
GDGT |
Lignin |
Free Radical |
...
最新文章  | 
昨日文章 | 
前日文章
期刊:
Agriculture, Ecosystems & Environment |
Agricultural Water Management |
Applied Geochemistry |
Applied Soil Ecology |
Aquatic Geochemistry |
Atmospheric Research |
Biogeochemistry |
Biogeosciences |
Biology and Fertility of Soils |
Bioresource Technology |
CATENA |
Chemical Engineering Journal |
Chemical Geology |
Chemosphere |
CLEAN - Soil, Air, Water |
Colloids and Surfaces A: Physicochemical and Engineering Aspects |
Deep Sea Research Part II: Topical Studies in Oceanography |
Earth-Science Reviews |
Ecological Engineering |
Ecology Letters |
Ecology |
Ecotoxicology and Environmental Safety |
Environment International |
Environmental Earth Sciences |
Environmental Geochemistry and Health |
Environmental Monitoring and Assessment |
Environmental Pollution |
Environmental Research |
Environmental Science & Technology |
Environmental Science and Pollution Research |
Environmental Science: Processes Impacts |
Environmental Science: Water Research & Technology |
Environmental Toxicology and Chemistry |
Estuarine, Coastal and Shelf Science |
European Journal of Soil Science |
Forest Ecology and Management |
Geochimica et Cosmochimica Acta |
Geoderma |
Geophysical Research Letters |
Global Change Biology |
Global Biogeochemical Cycles |
Groundwater |
Harmful Algae |
International Journal of Coal Geology |
Journal of Environmental Chemical Engineering |
Journal of Environmental Management |
Journal of Environmental Sciences |
Journal of Geophysical Research: Biogeosciences |
Journal of Geophysical Research: Oceans |
Journal of Hazardous Materials |
Journal of Membrane Science |
Journal of Soils and Sediments |
Land Degradation & Development |
Limnology and Oceanography |
Marine Chemistry |
Marine Pollution Bulletin |
Nature Communications |
Nature Geoscience |
Ocean Science Journal |
Oikos |
Organic Geochemistry |
Palaeogeography, Palaeoclimatology, Palaeoecology |
Plant and Soil |
Progress in Oceanography |
Quaternary International |
Science of The Total Environment |
Sedimentary Geology |
Separation and Purification Technology |
Soil and Tillage Research |
Soil Biology and Biochemistry |
Waste Management |
Water Research |
Water, Air, & Soil Pollution |
Wetlands |
...

所有论文

141. 题目: A soil health assessment tool for vegetable cropping systems in tropical soils based on beta-glucosidase, arylsulfatase, and soil organic carbon
文章编号: N24040810
期刊: Applied Soil Ecology
作者: Roberto Guimarães Carneiro, Cícero Célio de Figueiredo, Juaci Vitoria Malaquias, Ieda Carvalho Mendes
更新时间: 2024-04-08
摘要: Vegetable production is characterized by a strong dependence on external inputs and intense tillage, which can harm soil health (SH) by reducing organic matter levels, soil biota diversity, and overall ecosystem functions. Tools to assess SH affected by organic and conventional vegetable production systems are crucial and still scarce. This study aimed to develop a practical and reliable SH assessment tool for vegetable production systems in tropical soils by integrating Cornell's Comprehensive Assessment of Soil Health (CASH) with the four-quadrant model (4QM). Furthermore, the study evaluated the relationship between management practices and SH status. Arylsulfatase (ARYL) and β-glucosidase (GLU) activities, and soil organic carbon (SOC) were analyzed in 90 soil samples (0 to 10 cm depth) collected from 53 organic and conventional vegetable farms in the Federal District, Brazil. The adoption of practices aimed at improving or maintaining SH was significantly greater on organic farms than on conventionally managed farms, resulting in a SOC content and ARYL activity 27 % and 86 % higher in organic farms than in conventional systems, respectively ( < 0.05). ARYL proved to be more accurate in separating organic and conventional fields than GLU, highlighting its potential for SH evaluation in vegetable production systems. The integration of CASH and the 4QM, along with ARYL, GLU, and SOC measurements, effectively addressed the complexity of both organic and conventional vegetable production systems. This combined approach facilitated differentiation between systems based on varying levels of adoption of best management practices (BMPs). Further research is needed to assess the performance of this approach across different soil types and regions where vegetables are cultivated.

142. 题目: Linking the humification of organic amendments with size aggregate distribution: Insights into molecular composition using FT-ICR-MS
文章编号: N24040809
期刊: Science of the Total Environment
作者: Ho Gyeong Chae, Andrew J Margenot, Jong-Rok Jeon, Min Sung Kim, Kyoung-Soon Jang, Ho Young Yoon, Pil Joo Kim, Jeong Gu Lee
更新时间: 2024-04-08
摘要: Soil organic matter (SOM) plays a pivotal role in enhancing physical and biological characteristics of soil. Humic substances constitute a substantial proportion of SOM and their increase can improve crop yields and promote agricultural sustainability. While previous research has primarily assessed the influence that humic acids (HAs) derived from natural water have on soil structure, our study focuses on the impact of HAs on soil aggregation under different fertilizer regimes. During the summer cropping season, maize was cultivated under organic and synthetic fertilizer treatments. The organic fertilizer treatment utilized barley ( L.) and hairy vetch ( R.) as an organic amendment five days prior to maize planting. The synthetic treatment included a synthetic fertilizer (NPK) applied at South Korea's recommended rates. The organic treatment resulted in significant improvements in the soil aggregates and stability (mean weight diameter, MWD; < 0.05) compared to the synthetic fertilizer application. These improvements could be primarily attributed to the increased quantity and quality of HAs in the soil derived from the organic amendment. The amount of extracted HAs in the organic treatment was nearly twice that of the synthetic treatment. Additionally, the organic treatment had a 140 % larger MWD and a 40 % increase in total phenolic content compared to the synthetic treatment. The organic treatment also had an increased macronutrient uptake ( < 0.001), an 11 % increase in aboveground maize biomass, and a 21 % increase in grain yield relative to the synthetic treatment. Thus, the enhancement of HA properties through the incorporation of fresh organic manure can both directly and indirectly increase crop productivity.

143. 题目: Soil dependence of biochar composts in mitigating greenhouse gas emissions: An overlooked biophysical mechanism
文章编号: N24040808
期刊: Applied Soil Ecology
作者: Jialin Hu, K Taylor Cyle, Wenqiao Yuan, Wei Shi
更新时间: 2024-04-08
摘要: Biochar-manure co-compost (BM) has garnered considerable attention as a promising soil amendment for improving nutrient retention and mitigating the emission of greenhouse gases (GHGs). However, its efficacy often varies largely from one soil to another. By comparing soil CO and NO effluxes, solution chemistry, enzyme activities, and the abundances of N-cycle genes between BM and manure compost (M) across three soils of different texture classes through microcosm incubations, we aimed to develop biophysical mechanics to untangle the soil-dependent efficacy of BM in mediating soil carbon and nitrogen transformation processes. Compared to M addition, BM addition significantly reduced soil CO and NO emissions, but its effectiveness was soil texture-dependent, being strongest for CO and NO in fine-textured clay loam and coarse-textured sand, respectively. Such soil texture-dependent effects of BM versus M were also observed in soil enzyme activities and gene copy numbers of ammonia-oxidizing bacteria and denitrifiers. Our datasets suggest that BM interacted strongly with soil texture to modulate the pore scale-based diffusion of oxygen, thereby creating divergence in the aeration status among soils. Sequentially, soil phenol oxidase activity was greater in BM than in M under more aerobic conditions but no difference between BM and M in oxygen-limited soils. The balance between oxygen depletion due to microbial respiration of organic amendments and oxygen diffusion through soil/biochar pores also shaped the activities of nitrifying and denitrifying prokaryotes differently between coarse- and fine-textured soils. This logic model well-explained the magnitude of change in soil-dependent CO and NO emissions from organic amendments. The knowledge gained in this work will likely have profound practical ramifications for optimizing BM efficacy in mitigating the GHGs emission.

144. 题目: Valorization of humins into furanyl functionalized biochar for selective hydrogenation of five-member rings of furan compounds
文章编号: N24040807
期刊: Chemical Engineering Journal
作者: Yuxi Si, Yuanchao Huang, Zixuan Ma, Xusheng Guo, Houhong Song, Siyu Yao, Youwei Cheng
更新时间: 2024-04-08
摘要: Humins, an unavoidable by-product of the acid-catalyzed conversion of carbohydrates, significantly limits the yield of platform molecules and accounts for the majority of carbon loss in the biomass utilization processes. Therefore, the utilization and recovery of humins is highly importance to enhance the atom efficiency of biomass valorization. In this work, using potassium ferrate (KFeO) to realize synchronous carbonization and graphitization, humins obtained from the dehydration of fructose is transformed into a novel porous biochar material and further applied to prepare noble metal based hydrogenation catalysts. By tuning the carbonization temperature, we demonstrate biochar calcined at 600 °C has large mass specific surface area while retaining abundant furan groups in the framework. With the high density of furan groups in structure, the Pd/biochar catalysts enhances the preferential adsorption capability of furanyl functional groups, thereby promoting the hydrogenation rate of furan compounds and improving the hydrogenation selectivity of furan rings. The demonstration of this novel application of humins will not only enhance the carbon efficiency of biomass conversion processes but also provide functionalized materials for catalytic applications.

145. 题目: Heavy metal induced shifts in microbial community composition and interactions with dissolved organic matter in coastal sediments
文章编号: N24040806
期刊: Science of the Total Environment
作者: Yu Wang, Yuxing Hu, Yanting Liu, Qi Chen, Jinxin Xu, Fei Zhang, Jinhua Mao, Quan Shi, Chen He, Ranhong Cai, Christian Lønborg, Lihua Liu, Aixing Guo, Nianzhi Jiao, Qiang Zheng
更新时间: 2024-04-08
摘要: Heavy metals can impact the structure and function of coastal sediment. The dissolved organic matter (DOM) pool plays an important role in determining both the heavy metal toxicity and microbial community composition in coastal sediments. However, how heavy metals affect the interactions between microbial communities and DOM remains unclear. Here, we investigated the influence of heavy metals on the microbial community structure (including bacteria and archaea) and DOM composition in surface sediments of Beibu Gulf, China. Our results revealed firstly that chromium, zinc, cadmium, and lead were the heavy metals contributing to pollution in our studied area. Furthermore, the DOM chemical composition was distinctly different in the contaminated area from the uncontaminated area, characterized by a higher average O/C ratio and increased prevalence of carboxyl-rich alicyclic molecules (CRAM) and highly unsaturated compounds (HUC). This indicates that DOM in the contaminated area was more recalcitrant compared to the uncontaminated area. Except for differences in archaeal diversity between the two areas, there were no significant variations observed in the structure of archaea and bacteria, as well as the diversity of bacteria, across the two areas. Nevertheless, our co-occurrence network analysis revealed that the B2M28 and Euryarchaeota, dominating bacterial and archaeal groups in the contaminated area were strongly related to CRAM. The network analysis also unveiled correlations between active bacteria and elevated proportions of nitrogen-containing DOM molecules. In contrast, the archaea-DOM network exhibited strong associations with nitrogen- and sulfur-containing molecules. Collectively, these findings suggest that heavy metals indeed influence the interaction between microbial communities and DOM, potentially affecting the accumulation of recalcitrant compounds in coastal sediments.

146. 题目: Spectroscopic insights into the influence of oxidation on the binding properties of Cu(II) onto biochar-derived dissolved organic matter
文章编号: N24040805
期刊: Journal of Environmental Chemical Engineering
作者: Ping Yu, Yuyao Peng, Jiali Liu, Xujing Guo
更新时间: 2024-04-08
摘要: The oxidation may change the composition, content, and structure of biochar-derived dissolved organic matter (BDOM) that influences the geochemical behavior of heavy metals (HMs) when biochar is applied. Herein, the binding characteristics of Cu(II) onto BDOM and oxidized BDOM (OBDOM) were investigated using synchronous fluorescence spectra (SFS) and Fourier transform infrared (FTIR) spectroscopy in combination with two-dimensional correlation spectroscopy (2D-COS). The results showed that the content of BDOM and BDOM decreased by 30.21% and 13.67% respectively after oxidation. Humic-like substances are dominated in the BDOM, which can be preferentially oxidized. Meanwhile, humic-like substances (e.g. 412 nm in the BDOM, 490 nm in the OBDOM, 525 nm in the BDOM and OBDOM) can preferentially react with Cu(II). The functional groups, at 1712 cm in the BDOM, 1631 and 1290 cm in the OBDOM, 1515 cm in the BDOM, 1740 cm in the OBDOM, played important roles in the complexation between humic-like substances and Cu(II). The logarithmic conditional stability constant (Log K) of the complexes is higher in the OBDOM than those in the BDOM, and higher in the OBDOM than those in the BDOM. The results also indicated that the presence of BDOM promoted the adsorption of Cu(II) by BC300 and BC600, and inhibited the adsorption of Cu(II) by OBC300 and OBC600. Therefore, it is particularly important to insight into the effect of oxidation on the binding properties of Cu(II) and BDOM. This study can provide scientific guidance for the use of biochar in the remediation of HMs.

147. 题目: A novel magnetic graphene-loaded biochar gel for the remediation of arsenic- and antimony-contaminated mining soil
文章编号: N24040804
期刊: Science of the Total Environment
作者: Yurong Gao, Jiayi Li, Caibin Li, Hanbo Chen, Zheng Fang, Kwasi Adusei-Fosu, Yuchuan Wang, Lukas Trakal, Hailong Wang
更新时间: 2024-04-08
摘要: Metalloid co-contamination such as arsenic (As) and antimony (Sb) in soils has posed a significant threat to ecological balance and human well-being. In this study, a novel magnetic graphene-loaded biochar gel (FeBG) was developed, and its remediation potential for the reclamation of AsSb spoiled soil was assessed through a six-month soil incubation experiment. Results showed that the incorporation of iron substances and graphene imparted FeBG with enhanced surface characteristics, such as the formation of a new FeO bond and an enlarged surface area compared to the pristine biochar (BC) (80.5 m g vs 57.4 m g). Application of FeBG significantly decreased NaHPO-extractable concentration of As in soils by 9.9 %, whilst BC addition had a non-significant influence on As availability, compared to the control. Additionally, both BC (8.2 %) and FeBG (16.4 %) treatments decreased the NaHPO-extractable concentration of Sb in soils. The enhanced immobilization efficiency of FeBG for As/Sb could be attributed to FeBG-induced electrostatic attraction, complexation (Fe–O(H)–As/Sb), and π-π electron donor-acceptor coordination mechanisms. Additionally, the FeBG application boosted the activities of sucrase (9.6 %) and leucine aminopeptidase (7.7 %), compared to the control. PLS-PM analysis revealed a significant negative impact of soil physicochemical properties on the availability of As (β = −0.611, < 0.01) and Sb (β = −0.848, < 0.001) in soils, in which Sb availability subsequently led to a suppression in soil enzyme activities (β = −0.514, < 0.01). Overall, the novel FeBG could be a potential amendment for the simultaneous stabilization of As/Sb and the improvement of soil quality in contaminated soils.

148. 题目: Losses of native mineral-associated organic nitrogen through microbial mineralization and gaseous emissions induced by ammonium and nitrate addition
文章编号: N24040803
期刊: Soil Biology and Biochemistry
作者: Suxian Ren, Tianci Huo, Dianjie Wang, Junyi Liang
更新时间: 2024-04-08
摘要: Atmospheric nitrogen (N) deposition has a significant impact on terrestrial N cycling. However, it has not been well understood how external inorganic N addition affects the dynamics of soil organic N (SON) that supports long-term plant productivity and carbon (C) sequestration. Here, we added six levels of ammonium (NH-N) or nitrate (NO-N) to a temperate grassland soil to reveal the mechanisms of SON responses to inorganic N addition. Results showed that the SON content decreased by 7% ± 2%–15% ± 1%, which corresponded with the increase in the abundance of functional gene related to SON mineralization (i.e., ) by both NH-N and NO-N. The inorganic N addition stimulated gaseous losses from the native soil N, leading to at least 6% ± 2%–12% ± 1% of the initial SON lost at different N addition levels (i.e., N-priming). However, the responses of nitrification- and denitrification-related functional genes to NH-N and NO-N treatments varied remarkably. The positive responses of nitrification- and denitrification-related functional genes (i.e., , , and ) to NO-N addition contributed to gaseous N losses. The negative responses of some denitrification-related functional genes (i.e., , , and ) to NH-N addition resulted in less gaseous N losses by NH-N compared with that by NO-N addition. Additionally, the release of H by NH-N addition may liberate organic matter from associated minerals, showing a decrease in mineral-associated organic matter (MAOM) but an increase in extractable Fe. These findings provide direct evidence that the addition of inorganic N results in a net native SON loss through microbe-mediated mineralization and gaseous emissions. The study also emphasizes the different mechanisms of reduced and oxidized N additions in affecting SON mineralization and gaseous N losses.

149. 题目: The roles of sampling depth, lateral profile density and vertical sampling density in 3D digital soil mapping of soil organic carbon
文章编号: N24040802
期刊: Geoderma
作者: Mei-Wei Zhang, Xiao-Lin Sun, Xiao-Qing Wang, Hua-Lei Yang, Hui-Li Wang, Zhi-Gang Huang, Dai-Hua Jiang, Yun-Jin Wu
更新时间: 2024-04-08
摘要: Sampling density and depth play crucial roles in three-dimensional (3D) soil modeling and prediction, particularly in digital soil mapping (DSM). However, previous studies have yielded inconsistent and even contradictory results regarding impacts of sampling density and depth on the accuracy of 3D DSM. Hence, this study aimed to evaluate the impacts of sampling depth, vertical sampling density and lateral profile density on 3D soil mapping accuracy based on a case study of soil organic carbon (SOC). To achieve this, a comprehensive analysis was conducted based on 511 soil samples collected from 111 profiles in a local hilly area spanning 5.52 km in China. A 3D regression geostatistical approach was employed for the analysis. The results revealed that samples taken from different depth intervals exhibited varying degrees of importance in relation to prediction accuracy. Notably, a reduced number of surface soil samples (0–0.3 m) led to significant fluctuations in the accuracy of predictions for the entire soil profile. Furthermore, a lower number of subsurface soil samples (0.3–0.6 m) also diminished the overall prediction accuracy, while the influence of deeper soil samples (0.6–1.2 m) on the overall accuracy was relatively less pronounced. Reducing the number of profiles for calibration led to significantly worse and more variable prediction accuracy, compared to reducing vertical samples. For 3D mapping, this study recommends prioritizing the collection of additional lateral profiles, specifically focusing on surface and subsurface soils, especially for properties that display vertical variation similar to SOC.

150. 题目: Investigation on structure, evaporation, and desiccation cracking of soil with straw biochar
文章编号: N24040801
期刊: Land Degradation & Development
作者: Binbin Yang, Yang Chen, Shichong Yuan
更新时间: 2024-04-08
摘要: To investigate the cracking behavior in the evaporation process of the soil surface with biochar as an additive, five experimental groups were established in the natural environment with 0, 12, 60, 120, and 170 g·kg−1 biochar. The results of an investigation on organic matter and aggregations indicate that a high content of biochar can significantly improve the content of organic matter and the amount of soil aggregates. After adding 60 and 170 g·kg−1 biochar, the content of organic matter increased by 19.47% and 84.12%, respectively, and the content of soil aggregates with an average diameter greater than 0.25 mm increased by 16.43% and 38.20%, respectively. The investigation also examines the evaporation and cracking characteristics of soils that contain biochar. The rate of evaporation is approximately a “step” type function with time. The rate of evaporation is observed in three stages: the rapid, decelerating, and final evaporation stages. In the rapid evaporation stage, the initial evaporation rate of the sample that contains biochar is increased on average by 46%. The fractal dimension and cracks rate are decreased by 22.95% and 20.99% with 120 g·kg−1 biochar addition. This means that the increase of soil organic matter after adding biochar plays a crucial role in the stability of aggregates. As a soil conditioner, biochar has the ability to enhance soil water retention capacity and is a sustainable strategy to improve soil properties.

151. 题目: Monitoring of copper adsorption on biochar using spectral induced polarization method
文章编号: N24040621
期刊: Environmental Research
作者: Sheng Zhou, Yi-Xin Yang, Jing-Jing Cao, Long-Long Meng, Jun-Nan Cao, Chi Zhang, Shuai Zhang, B Bate
更新时间: 2024-04-06
摘要: Copper contaminant generated from mining and industrial smelting poses potential risks to human health. Biochar, as a low-energy and cost-effective biomaterial, holds value in Cu remediation. Spectral Induced Polarization (SIP) technique is employed in this study to monitor the Cu remediation processes of by biochar in column experiments. Cation exchange at low Cu concentrations and surface complexation at high Cu concentrations are identified as the major mechanisms for copper retention on biochar. The normalized chargeability () from SIP signals linearly decreased (R = 0.776) with copper retention under 60 mg/L Cu influent; while linearly increases (R = 0.907, 0.852) under high 300 and 700 mg/L Cu influents. The characteristic polarizing unit sizes (primarily the pores adsorbing Cu) calculated from Schwartz equation match well with experimental results by mercury intrusion porosimetry (MIP). It is revealed that Cu was driven to small pores (∼3 μm) given high concentration gradient (influent Cu concentration of 700 mg/L). Comparing to activated carbon, biochar is identified as an ideal adsorbent for Cu remediation, given its high adsorption capacity, cost-effectiveness, carbon-sink ability, and high sensitivity to SIP responses – the latter facilitates its performance assessment.

152. 题目: Ancient prairies as a reference for soil organic carbon content and microbial community structure
文章编号: N24040620
期刊: Applied Soil Ecology
作者: Samuel Lord, Kristen S Veum, Lauren L Sullivan, Stephen H Anderson, Veronica Acosta-Martinez, Kerry Clark
更新时间: 2024-04-06
摘要: The historic remnant prairies of Missouri display diversity above and below the soil surface and represent the few remaining acres of unconverted grassland habitat in the state. The soil microbiome is foundational to nutrient acquisition, resource partitioning, and ecosystem resilience; therefore, the intact plant-soil interactions of remnant prairies can serve as a reference for microbial community structure and ecosystem services lost due to land conversion. This research was conducted to show the importance of reference soil conditions and the variability that lies therein while contrasting degraded soil ecosystems to provide a standard to which comparable soils should be held. In this study, 35 sites across Missouri representing three prairie management conditions on similar soils and variable climatic conditions were compared to assess differences in the microbial community structure and biomass using phospholipid fatty acid (PLFA) analysis. Surface (0–7.5 cm) soil organic carbon (SOC) content provided a measure of substrate available to support microbial community health. Total microbial biomass, the biomass of individual microbial groups, selected biomarker ratios, and SOC, were significantly different across treatments and highest in remnant prairies apart from Saprophytic fungi and eukaryotes. This study demonstrated that the soil microbial community in reconstructed and restored prairie systems remained significantly diminished in biomass relative to remnant prairies, even after several decades. This study highlights the need to preserve remnant prairies, where soil is in its native state under native flora and abiotic conditions. These results also illustrate the importance of selecting remnant systems as the ecological reference standard for prairie lands.

153. 题目: Improved production of medium-chain fatty acids by biochar: Effect of biochar dosage and mechanism
文章编号: N24040620
期刊: Journal of Cleaner Production
作者: Tianru Lou, Yanan Yin, Jianlong Wang
更新时间: 2024-04-06
摘要: Chain elongation (CE) is a promising technology that can produce medium-chain fatty acids (MCFAs) from sewage sludge, reaching the dual benefits of waste management and clean energy production. The feasibility of using biochar to enhance CE efficiency was examined in this study, where the underlying promoting mechanisms and optimal biochar dosage were also simultaneously explored. Biochar improved the carbon conversion and electron transfer efficiency of CE. The highest caproate concentration (3347.95 mg/L) occurred in the group with 10 g/L biochar addition, and caprylate was most accumulated (612.36 mg/L) when biochar dosage was 20 g/L. The electroactive genera positively related to MCFAs (e.g., 0-KF and ) were noticeably enriched by low dosage, but the acidification genera proliferated better under excessive dosage. The different MCFAs production induced by varied biochar dosages was closely related to the genera . The strengthened dominant CE pathways, FAB, might account for the promoted MCFAs production.

154. 题目: Biochar application for sustainable soil erosion control: a review of current research and future perspectives
文章编号: N24040619
期刊: Frontiers in Environmental Science
作者: Prabhakar Sharma
更新时间: 2024-04-06
摘要: Soil erosion is a pressing environmental issue with significant agricultural productivity and ecosystem stability implications. In recent years, biochar, a carbon-rich product of biomass pyrolysis, has emerged as a promising soil amendment tool for erosion control due to its ability to improve soil quality and stability. This review paper aims to comprehensively analyze the effectiveness of biochar role in mitigation of soil erosion and sustainable land management practices. By examining a wide range of research studies, this paper elucidates the impact of biochar on key soil erosion parameters as it directly affects the soil structure, water-holding capacity, and nutrient retention. The paper discusses how biochar interacts with soil particles and aggregates to enhance their stability and resistance to erosive forces. It also assesses the influence of biochar properties, such as feedstock type, pyrolysis temperature, and application rate, on its erosion control efficacy. Furthermore, this review explores the role of biochar in promoting plant growth and root development, thereby reinforcing the vegetation cover and further reducing erosion susceptibility. Finally, an outline of potential challenges and opportunities for the widespread adoption of biochar-based erosion control strategies in different agricultural and environmental contexts is presented. Overall, this review provides valuable insights into the multifacet role of biochar in sustainable soil management and offers recommendations for future research directions on direct and indirect application on soil erosion control.

155. 题目: Pyrolysis of biomass harvested from heavy-metal contaminated area: Characteristics of bio-oils and biochars from batch-wise one-stage and continuous two-stage pyrolysis
文章编号: N24040619
期刊: Chemosphere
作者: Ki-Bum Park, Da-Yeong Chae, Elham H Fini, Joo-Sik Kim
更新时间: 2024-04-06
摘要: This study evaluates pyrolysis products obtained from biomasses (silver grass, pine, and acacia) harvested from heavy-metal-contaminated soil. To do so, we utilized two methods: a batch one-stage pyrolysis, and a continuous two-stage pyrolysis. The study results show that the yields and characteristics of bio-oils and biochars varied depending on the pyrolysis process and the type of biomass. The two-stage pyrolysis having two reactors (auger and fluidized bed reactors) appeared to be very suitable for specific chemicals production such as acetic acid, acetol, catechol, and levoglucosan. The biochar obtained from the fluidized-bed reactor of two-stage pyrolysis had high thermal stability, high crystallinity, high inorganic content, and a small number of functional groups. In contrast, the biochar obtained from the one-stage pyrolysis had low thermal stability, low crystallinity, a high carbon content, and a large number of functional groups. The biochar obtained from the two-stage pyrolysis appeared to be suitable as a material for catalyst support and as an adsorbent. The biochar obtained from one-stage pyrolysis appeared to be a suitable as a soil amendment, as an adsorbent, and as a precursor of activated carbon. All biochars showed a negative carbon footprint. In the end, this study, which was conducted using two different processes, was able to obtain the fact that products of pyrolysis biomass contaminated with heavy metals have different characteristics depending on the process characteristics and that their utilization plans are different accordingly. If the optimal utilization method proposed through this study is found, pyrolysis will be able to gain importance as an effective treatment method for biomass contaminated with heavy metals.

156. 题目: Afforestation enhances glomalin-related soil protein content but decreases its contribution to soil organic carbon in a subtropical karst area
文章编号: N24040618
期刊: Journal of Environmental Management
作者: Rui Gu, Kongcao Xiao, Zihong Zhu, Xunyang He, Dejun Li
更新时间: 2024-04-06
摘要: Afforestation on degraded croplands has been proposed as an effective measure to promote ecosystem functions including soil organic carbon (SOC) sequestration. Glomalin-related soil protein (GRSP) plays a crucial role in promoting the accumulation and stability of SOC. Nevertheless, mechanisms underlying the effects of afforestation on GRSP accumulation have not been well elucidated. In the present study, 14 pairs of maize fields and plantation forests were selected using a paired-site approach in a karst region of southwest China. By measuring soil GRSP and a variety of soil biotic and abiotic variables, the pattern of and controls on GRSP accumulation in response to afforestation were explored. The average content of total GRSP (T-GRSP) and its contribution to SOC in the maize field were 5.22 ± 0.29 mg g and 42.33 ± 2.25%, and those in the plantation forest were 6.59 ± 0.32 mg g and 25.77 ± 1.17%, respectively. T-GRSP content was increased by 26.4% on average, but its contribution to SOC was decreased by 39.1% following afforestation. T-GRSP content decreased as soil depth increased regardless of afforestation or not. Afforestation increased T-GRSP indirectly via its positive effects on arbuscular mycorrhizal fungi biomass, which was stimulated by afforestation through elevating fine root biomass or increasing the availability of labile C and N. The suppressed contribution of T-GRSP to SOC following afforestation was due to the relatively higher increase in other SOC components than T-GRSP and the significant increase of soil C:N ratio. Our study reveals the mechanisms underlying the effects of afforestation on T-GRSP accumulation, and is conducive to improving the mechanistic understanding of microbial control on SOC sequestration following afforestation.

157. 题目: Remediation of polycyclic aromatic hydrocarbons polluted soil by biochar loaded humic acid activating persulfate: performance, process and mechanisms
文章编号: N24040618
期刊: Bioresource Technology
作者: Yuxin Ke, Xing Zhang, Yuhang Ren, Xiaoli Zhu, Shaocheng Si, Bing Kou, Ziye Zhang, Junqiang Wang, Baoshou Shen
更新时间: 2024-04-06
摘要: The remediation for polycyclic aromatic hydrocarbons contaminated soil with cost-effective method has received significant public concern, a composite material, therefore, been fabricated by loading humic acid into biochar in this study to activate persulfate for naphthalene, pyrene and benzo(a)pyrene remediation. Experimental results proved the hypothesis that biochar loaded humic acid combined both advantages of individual materials in polycyclic aromatic hydrocarbons adsorption and persulfate activation, achieved synergistic performance in naphthalene, pyrene and benzo(a)pyrene removal from aqueous solution with efficiency reached at 98.2%, 99.3% and 90.1%, respectively. In addition, degradation played a crucial role in polycyclic aromatic hydrocarbons remediation, converting polycyclic aromatic hydrocarbons into less toxic intermediates through radicals of SO, OH, O, and O generated from persulfate activation process. Despite pH fluctuation and interfering ions inhibited remediation efficiency in some extent, the excellent performances of composite material in two field soil samples (76.7% and 91.9%) highlighted its potential in large-scale remediation.

158. 题目: Sustainable efficient utilization of magnetic porous biochar for adsorption of orange G and tetracycline: Inherent roles of adsorption and mechanisms
文章编号: N24040617
期刊: Environmental Research
作者: Jiayin Hao, Zhiliang Cui, Jiale Liang, Jun Ma, Nanqi Ren, Huihui Zhou, Defeng Xing
更新时间: 2024-04-06
摘要: Iron-doped biochar has been widely used as an adsorbent to remove contaminants due to the high adsorption performance, but it still suffers from complicated preparation methods, unstable iron loading, unsatisfactory specific surface area, and uneven distribution of active sites. Here, a novel magnetic porous biochar (FeCS800) with nanostructure on surface was synthesized by one-pot pyrolysis method of corn straw with KFeO, and used in orange G (OG) and tetracycline (TC) adsorption. FeCS800 exhibited outstanding adsorption capacities for OG and TC after KFeO activation and the adsorption data were fitted satisfactorily to Langmuir isotherm and Pseudo-second-order kinetic model. The maximum adsorption capacities of FeCS800 for OG and TC were around 303.03 mg/g and 322.58 mg/g, respectively, at 25 °C and pH 7.0, which were 16.27 and 24.61 times higher than that before modification. Thermodynamic studies showed that the adsorption of OG/TC by FeCS800 were thermodynamically favorable and highly spontaneous. And the adsorption capacity of OG and TC by FeCS800 remained 77% and 81% after 5 cycles, respectively, indicating that FeCS800 had good stability. The outstanding adsorption properties and remarkable reusability of FeCS800 show its great potential to be an economic and environmental adsorbent in contaminants removal.

159. 题目: Material and microbial perspectives on understanding the role of biochar in mitigating ammonia inhibition during anaerobic digestion
文章编号: N24040617
期刊: Water Research
作者: Zhi-Jun Zhao, Xiao-Li Liu, Yi-Xuan Wang, Yan-Shan Wang, Jin-You Shen, Zhi-Cheng Pan, Yang Mu
更新时间: 2024-04-06
摘要: With the increasing adoption of carbon-based strategies to enhance methanogenic processes, there is a growing concern regarding the correlation between biochar properties and its stimulating effects on anaerobic digestion (AD) under ammonia inhibition. This study delves into the relevant characteristics and potential mechanisms of biochar in the context of AD system under ammonia inhibition. The introduction of optimized biochar, distinguished by rich CO bond, abundant defect density, and high electronic capacity, resulted in a significant reduction in the lag period of anaerobic digestion system under 5.0 g/L ammonia stress, approximately by around 63 % compared to the control one. Biochar helps regulate the community structure, promotes the accumulation of acetate-consuming bacteria, in the AD system under ammonia inhibition. More examinations show that biochar promotes direct interspecies electron transfer in AD system under ammonia inhibition, as evidenced by diminished levels of bound electroactive extracellular polymeric substances, increased abundance of electroactive bacteria, and notably, the up-regulation of direct interspecies electron transfer associated genes, including the conductive pili and genes, as revealed by meta-transcriptomic analysis. Additionally, gene expression related to proteins associated with ammonium detoxification were found to be up-regulated in systems supplemented with biochar. These findings provide essential evidence and insights for the selection and potential engineering of effective biochar to enhance AD performance under ammonia inhibition.

160. 题目: The promotion of the atrazine degradation mechanism by humic acid in a soil microbial electrochemical system
文章编号: N24040616
期刊: Journal of Environmental Management
作者: Xinyu Li, Xian Cao, Hui Wang, Yilun Sun, Shuai Zhang, Sirapat Khodseewong, Takashi Sakamaki
更新时间: 2024-04-06
摘要: The enhancing effects of anodes on the degradation of the organochlorine pesticide atrazine (ATR) in soil within microbial electrochemical systems (MES) have been extensively researched. However, the impact and underlying mechanisms of soil microbial electrochemical systems (MES) on ATR degradation, particularly under conditions involving the addition of humic acids (HAs), remain elusive. In this investigation, a soil MES supplemented with humic acids (HAs) was established to assess the promotional effects and mechanisms of HAs on ATR degradation, utilizing EEM-PARAFAC and SEM analyses. Results revealed that the maximum power density of the MES in soil increased by 150%, and the degradation efficiency of ATR improved by over 50% following the addition of HAs. Furthermore, HAs were found to facilitate efficient ATR degradation in the far-anode region by mediating extracellular electron transfer. The components identified as critical in promoting ATR degradation were Like-Protein and Like-Humic acid substances. Analysis of the microbial community structure indicated that the addition of HAs favored the evolution of the soil MES microbial community and the enrichment of electroactive microorganisms. In the ATR degradation process, the swift accumulation of Hydrocarbyl ATR (HYA) was identified as the primary cause for the rapid degradation of ATR in electron-rich conditions. Essentially, HA facilitates the reduction of ATR to HYA through mediated bonded electron transfer, thereby markedly enhancing the efficiency of ATR degradation.

 共 22981 条记录  本页 20 条  本页从 141-160 条  8/1150页  首页 上一页  3 4 5 6 7 8 9 10 11 12 13  下一页  末页   

本数据库数据来源自各期刊,所有权归属各期刊。数据仅供分享学习,不作商业用途,特此申明。