161. 题目: Persulfate activation by inherent soil constituents for sulfamethoxazole degradation: Synergistic roles of iron minerals and organic matter 文章编号: N25060201 期刊: Chemical Engineering Journal 作者: Shixian Cheng, Jun Liang, Zhiwen Cheng, Jingyi Zhang, Liyang Hu, Wenfeng Huang, Xiangyang Gui, Zhefan Ren, Xiaoyun Xu, Xinde Cao 更新时间: 2025-06-02 摘要: Persulfate (PS)-based in situ chemical oxidation has attracted extensive attention for remediating organic-contaminated soils. The inherent Fe minerals can act as the activators of PS in the degradation of soil organic contaminants, but the combined effects of Fe minerals and organic matter (OM) remained elusive. Here, we investigated sulfamethoxazole (SMX) degradation by PS in complex soil system. Results showed that SMX degradation by PS in soil could reach 70.7 %. Notably, the removal of free Fe oxides led to a 12.6 % decrease in SMX degradation, while OM removal resulted in a more substantial 28.0 % decrease in SMX degradation, implying that inherent OM played more pivotal roles in SMX degradation than Fe minerals. Furthermore, the synergistic roles of OM and Fe mineral facilitated SMX degradation through the formation of surface complexes between Fe minerals and OM with -HOH and -COO groups, as analyzed by fourier transform ion cyclotron resonance mass spectrometry. Specifically, the presence of OM promoted the reductive dissolution of Fe minerals, leading to the generation of surface-bound Fe(II). Then this Fe(II) formed a complex with OM, which was favorable for the PS activation to produce reactive species. The dominant roles of radicals, particularly •OH in SMX degradation were collectively evidenced by multiple methods, including quenching test, chemical-probing test, electron paramagnetic resonance, analysis of degradation products, and density functional theory calculations. These findings provide valuable insights into the interactions between Fe mineral and OM for PS activation in remediation of organic-contaminated soils.
162. 题目: The Gym Effect: Unveiling the Role of Microbial Adaptation in Organic Carbon Redistribution and Metabolic Optimization in Anaerobic Side-Stream Reactors 文章编号: N25060108 期刊: Water Research 作者: Huanzhong Deng, Chuanhan Chen, Lianpeng Sun, Hui Lu, Miao Wang, Xinzhe Zhu, Chao Yang, Ruo-hong Li 更新时间: 2025-06-01 摘要: Although anaerobic side-stream reactor (ASSR) technology has been proven effective in achieving sludge reduction, current research primarily focuses on specific cellular processes, such as cell lysis-cryptic growth, uncoupled metabolism, and endogenous metabolism. This narrow perspective overlooks the holistic impact of ASSR on mainstream systems. Therefore, this study developed a novel exogenous organic carbon balance model, providing a quantitative framework for analyzing carbon redistribution within the system. The results showed that alternating aerobic and deep anaerobic conditions induced significant microbial community reorganization, selectively enriching functional microorganisms such as polyphosphate-accumulating organisms and denitrifiers. This adaptation altered organic carbon flow, reducing assimilatory metabolism (from 3606.4 mg COD/d in the control group to 2872.5 and 2184.3 mg COD/d in the ASSR group), while enhancing aerobic dissimilatory metabolism (from 1866.1 mg COD/d in the control group to 2175.8 and 2616.4 mg COD/d in the ASSR group), thereby promoting pollutant mineralization and sludge reduction. The innovative concept of the Gym Effect was introduced to explain how environmental stress drives microbial adaptation, optimizes metabolic pathways, and enhances pollutant (nitrogen and phosphorus) removal processes (from 34.8 mg COD/g VSS·h in the control group to 49.8 and 66.7 mg COD/g VSS·h in the ASSR group). These findings redefine our understanding of the mechanisms underlying sludge reduction, establishing the relationship between sludge reduction and organic carbon flow redistribution, and providing a robust theoretical foundation for enhancing sludge reduction strategies.
163. 题目: Microporous “order-in-disorder” N-doped biochar via self-template strategy for efficient fenton-like catalysis 文章编号: N25060107 期刊: Chemical Engineering Journal 作者: Qing Du, Fanfan Lao, Changqing Zhu, Cailiang Yue, Fuqiang Liu, Shaobin Wang 更新时间: 2025-06-01 摘要: Constructing defect structures is an effective method to enhance the performance of carbon-based catalysts, but it encounters the deterioration of inherent conductivity. Herein, a micropore-rich N-doped biochar (NBC-3) with an “order-in-disorder” structure is synthesized via an ingenious KHCO3 intercalation-etching self-templating strategy, which simultaneously incorporates disordered amorphous carbon domains and ordered graphitic carbon ribbons. This strategy endows the nanostructure with abundant carbon vacancies, excellent conductivity and an ultra-high specific surface area (3400 m2 g−1). The efficient electron transfer channel on its surface promotes the ultrafast degradation of sulfamethoxazole via peroxymonosulfate activation. The catalyst-dosage-normalized kinetic constant is 23.50 L min−1 gCat−1, outdistancing previously reported values. Furthermore, in actual water treatment applications, a tower reactor equipped with only 40 mg of NBC-3 achieved zero SMZ discharge within 1100 min, outperforming conventional catalysts such as Fe0, Fe3O4, commercial biochar. Density-Functional-Theory calculations reveal that the synergistic effect of carbon vacancies and graphitic N allows the energy released during peroxymonosulfate activation to be stored in the carbon vacancies through surface deformation of the catalyst. This stored energy is subsequently released to promote −HSO4 desorption, enabling rapid site regeneration and accelerating the reaction. Overall, this study provides a scientific basis for designing efficient metal-free Fenton-like catalysts through molecular-level modulation.
164. 题目: Degradable film mulching increases soil carbon sequestration in major Chinese dryland agroecosystems 文章编号: N25060106 期刊: Nature Communications 作者: Zihan Liu, Chenxu Zhao, Nanhai Zhang, Jing Wang, Zhaoyang Li, Yves Uwiragiye, Nyumah Fallah, Thomas W Crowther, Yuanyuan Huang, Yuanyuan Huang, Yi Xu, Sheng Zhang, Yakov Kuzyakov, Kadambot H M Siddique, Zhikuan Jia, Zucong Cai, Scott X Chang, Minggang Xu, Christoph Müller, Yi Cheng 更新时间: 2025-06-01 摘要:
Plastic film mulching (PM), which contributes to nearly half of the increased crop yields in dryland agroecosystems, exacerbates environmental burdens due to its non-degradable nature. Globally, there is a growing demand to replace non-degradable PM with degradable film mulching (DM), yet its impacts on soil organic carbon (SOC) in dryland agroecosystems remains unknown. Here, using multi-field studies and mesocosm experiments, we found that DM strongly increased but PM reduced SOC storage (0–1 m). This difference is likely attributable to the higher microbial C use efficiency in soil under DM, leading to increased microbial-derived C compared to PM. Under the high roading scenario for 2100, DM could reduce the decomposition of SOC (0–1 m) in China’s drylands by 9.0 ± 1.0 Mg ha–1 year–1 (one standard error) compared with PM. Our findings highlight that DM is a promising alternative to PM for sequestrating SOC and alleviating C loss under climate change in dryland agroecosystems.
165. 题目: The roles of effluent organic matters, inorganic ions, and their interplay in affecting antibiotic degradation by an electroactive membrane 文章编号: N25060105 期刊: Journal of Hazardous Materials 作者: Yinghui Mo, Yihan Wang, Liang Wang, Jinxue Han, Lei Tian 更新时间: 2025-06-01 摘要: The electroactive membrane (EM) technology can effectively degrade antibiotics. However, impacts of different coexisting contaminants in real wastewater on the degradation of antibiotics of EMs lacks deep understanding. Based on real membrane bioreactor (MBR) effluent, this study differentiated the impacts of organic and inorganic fractions on sulfamethoxazole (SMX) degradation of an EM. In the MBR effluent, the SMX removal rate was only ~ 27 mg/(m2·h), significantly lower than that in the synthetic feed (~ 677 mg/(m2·h)). Small effluent organic matters (EfOMs) were identified as the key contributors that suppressed SMX degradation. Two primary mechanisms were confirmed, one being their reactivity on the EM, and the other being their attachment onto the EM that covered the reactive sites. On the other hand, positive impacts were found for large EfOMs and inorganic ions besides their negative impacts. The deposition of large EfOMs and inorganic precipitates on the EM surface partly prevented small EfOMs from covering interior reactive sites of the EM, and these fouling layers also extended the SMX retention time within the EM by remarkably decreasing the membrane flux. These results highlight the importance of carefully selecting pretreatment processes for EMs to mitigate the impacts of coexisting contaminants on antibiotic degradation.
166. 题目: Corn-derived biochar mitigates oxidative stress and increases the content of essential elements in lettuce leaves grown in phthalate-polluted soil 文章编号: N25060104 期刊: Science of the Total Environment 作者: Artur Sokołowski, Patryk Piskorski, Michał Dybowski, Justyna Szerement, Patryk Oleszczuk, Yanzheng Gao, Bożena Czech 更新时间: 2025-06-01 摘要: Phthalic acid esters (PAEs) are recognized markers of microplastic pollution of the environment. The study assessed the effects of different biochars (BC) derived from sewage sludge (SS), corn residues (CR), sunflower (SF), and residues from biogas production (BG) on lettuce grown in PAEs-polluted soil. The BC varied in composition, porosity, and carbon structure, with CR-BC exhibiting the highest surface area and optimal aliphatic carbon content, making it the most effective for soil application. SS had the highest heavy metal and PAHs content, though within safe limits. Elevated phosphate levels in lettuce leaves, influenced by high PAHs, ash, and metal content in BC, were associated with increased CAT activity, indicating oxidative stress. A strong positive correlation was found between Cd and phosphate content, especially in SS-treated plants, and between phosphate and B. CR-BC limited heavy metal uptake while promoting beneficial nutrient interactions (such as between Ca and Mg). PAEs accumulation in lettuce was strongly negatively correlated with phosphate and B levels, suggesting these elements reduce pollutant uptake. Among treatments, CR-BC significantly reduced PAEs accumulation in lettuce leaves, which is critical for food safety. CR-BC also enhanced lettuce biomass, chlorophyll content, and nutrient uptake, and it decreased oxidative stress (lower levels of MDA and enhanced antioxidant enzyme activity of SOD and CAT). Conversely, BG-BC negatively affected plant growth, likely due to its high pH. Overall, the findings highlight the importance of BC feedstock properties, with corn-derived BC offering the most beneficial effects on plant health and pollutant mitigation in polluted soils.
167. 题目: Impact of Minerals (Ferrihydrite and Goethite) and Their Organo-Mineral Complexes on Fate and Transport of Nanoplastics in the Riverine and Terrestrial Environments 文章编号: N25060103 期刊: Environmental Science & Technology 作者: Aniket Choudhary, Gopala Krishna Darbha 更新时间: 2025-06-01 摘要: Abundantly occurring minerals are detrimental in dictating nanoplastics (NPs) fate and transport in the environment. However, in natural scenarios, minerals barely exist in their pure phases. Minerals are often associated with organic matter and form organo-mineral complexes (OMCs), exhibiting different reactivity than their pure mineral phase. In this study, we investigated the impact of ferrihydrite, its weathering-originated secondary mineral goethite, and their corresponding OMCs, i.e., organo-ferrihydrite (O-Fh) and organo-goethite (O-Goe) on NPs mobility under varying environmental conditions (ionic strength, pH, and river water). Results showed higher sorption capacity of minerals compared to their respective OMCs for NPs, i.e., ferrihydrite (529.62 mg/g), O-Fh (439.08 mg/g), goethite (823.64 mg/g), and O-Goe (688.88 mg/g). Zeta potential and sedimentation kinetic studies suggested higher heteroaggregation and coagulation in the goethite-NPs bimodal system. NPs-minerals/OMCs interaction mechanisms were confirmed by FTIR and XPS analysis. Column transport experiments and DLVO analysis revealed that minerals/OMCs coated sand showed higher NPs retention than bare quartz sand under different pore water chemistry. Ferrihydrite and goethite coated sand columns have shown maximum NPs retention (>95%). Our study provides insight into how environmentally relevant mineral phases and thier corresponding OMCs impact NPs fate and transport in aqueous and terrestrial environments.
168. 题目: Interactive impact of biochar, selenium and water management on rice plants and soil microbial diversity in a cadmium-contaminated soil and assessment of health risk 文章编号: N25060102 期刊: Ecotoxicology and Environmental Safety 作者: Ofori Prince Danso, Gege Wu, Zhangmin Wang, Zezhou Zhang, Shanshan Niu, Emmanuel Osei Asamoah, Zhiwei Peng, Raza Farooq Muhammad, Jiaping Song, Xuebin Yin, Renbin Zhu 更新时间: 2025-06-01 摘要: Global soil cadmium (Cd) contamination demands practical, low-cost solutions to ensure safe food production. This study presents findings from a pot experiment designed to examine the interactive effects of biochar (BC) (B1: 0 %, B2: 1 %, B3: 2 % w/w), foliar selenium (Se) (S1: 0, S2: 0.25 mM, S3: 0.50 mM), and water management (WM) (W1: 70 % water holding capacity, W2: continuous flooding) on Cd effects on rice plants and microbial communities in a Cd-contaminated soil (0.92 mg/kg total Cd) and the associated health risk. The results indicated that the main effects of BC and WM significantly influenced pH and SPAD during the tillering and milk stage, with B2 and B3, and W2 increasing these values compared to B1 and W1. At the milk stage, the B3W2 interaction was significant for SPAD, increasing by 7.40 % compared to B1W1. The measured yield parameters were significantly affected by the main effects of BC, Se, and WM, with B2 and B3, S2 and S3, and W2 showing increased values over B1, S1, and W1. Similar results were observed for bioavailable Cd content; however, Se showed no significant effect. The B3S3W2 interaction significantly increased SOD by 91.56 %, while the B2S3W2 interaction exhibited the highest reductions in MDA (28.35 %) and H₂O₂ (57.61 %) relative to B1S1W1. Furthermore, the B2S3W2 interaction resulted in a 95.32 % reduction in grain Cd content compared to B1S1W1 and enhanced the bacterial ACE, Chao1, and Shannon indices, and the fungal ACE and Chao1 indices. Lastly, the B1S1W1 interaction had the highest daily intake (DI) (1.66E-04) and health risk index (HRI) (0.166), while the B2S3W2 interaction had the lowest DI (8.10E-06) and HRI (0.008). Our results suggest that the application of B2S3W2 can significantly inhibit Cd absorption and concentration in rice, mitigate the resulting health consequences, and enhance the soil microbial environment.
169. 题目: Molecular characterization and environmental response of dissolved organic matter in reserve quiescent groundwater wells of the North China plain: Insights from spectroscopy and mass spectrometry 文章编号: N25060101 期刊: Science of the Total Environment 作者: Jiafeng Zhang, , Yuting Zhao, Chenbin Wu, Shilei Zhou 更新时间: 2025-06-01 摘要: Dissolved organic matter (DOM) plays a critical role in aquatic ecosystems. However, the characteristics of DOM in groundwater source wells and interactions with environmental factors remain poorly understood. This study investigated the spectral properties, molecular composition, and environmental drivers across vertical groundwater gradients in Shijiazhuang using spectroscopy, Fourier transform ion cyclotron resonance mass spectrometry (FT-ICRMS), multivariate statistics and molecular network analysis. Three components were identified: two humic-like substances (C1, C3) and one protein-like component (C2) Humic-like substances exhibited significant vertical stratification, with bottom groundwater DOM showing higher humification and autochthonous characteristics. Multivariate statistical analysis indicated that NO3−-N and dissolved oxygen (DO) were keystone factors influencing the vertical differences of DOM. Surface-layer DOM was driven by dissolved total phosphorus (DTP), pH, DO and NO3−-N, while the bottom layer was jointly regulated by pH, total phosphorus (TP), total nitrogen (TN) and NO3−-N. DOM components correlated significantly with fluorescence index (FI), humification index (HIX), chemical oxygen demand (CODMn) and dissolved total nitrogen (DTN). FT-ICRMS analysis revealed that DOM molecular composition was dominated by CHO (38.71 %–52.07 %) and CHON (22.30 %–34.44 %) compounds, with lignin-like (LIG) (60.91 %–80.56 %) serving as the core molecular formulae. Redundancy analysis (RDA) identified that TN, DO, and NH4+-N were key drivers regulating the DOM molecules distribution. Furthermore, molecular network analysis demonstrated that LIG molecular formulae played a crucial role in the network, significantly enhancing the chemical stability of the DOM molecular network. These findings elucidate DOM dynamics in groundwater systems at a molecular scale, providing critical insights for resource protection and risk management.
170. 题目: New Pathway Mediated by Humic Acid Facilitates Long-Distance Hydroxyl Radical Production during Crystalline Iron Mineral Oxygenation 文章编号: N25053106 期刊: Environmental Science & Technology 作者: Wenbo Wu, Hengyi Fu, Huanxin Ma, Ke Sun, Zhenqing Shi, Zhi Dang, Chunhua Feng, Shishu Zhu 更新时间: 2025-05-31 摘要: Hydroxyl radicals (•OH) are extensively produced from crystalline iron minerals under redox oscillation, during which their oxidizing impact on pollutant dynamics is often limited by low transportation. While natural organic matter exists as a ubiquitous redox mediator, how it regulates the distance scale of •OH production in a heterogeneous system remains poorly understood. This study, for the first time, reports an unrecognized route mediated by humic acid (HA) in extending the spatial range of •OH from oxygenation of reduced hematite (rHem). The results showed that HA facilitated the spatial redistribution of •OH from the surface to the solution, posing inverse impacts on oxidation efficacies of pollutants with varying surface accessibilities. It was difficult to explain the enhanced free •OH production using electron shuttling by quinones or dissolved Fe–HA complexes. Comprehensive evidence demonstrated that adsorbed HA preferentially consumed surface-bound •OH to trigger a solid-to-liquid propagation of carbon-centered radicals (CCR•), dominantly promoting formation of secondary free •OH far from the surface. Reactive-transport simulation and in situ fluorescence results visualized interfacial and centimeter-scale long-range production of •OH mediated by CCR•. Fourier transform ion cyclotron resonance mass spectrometry verified the role of surface decarboxylation of adsorbed HA in CCR• generation. These findings offer new insights into the environmental fate of •OH produced during iron redox cycling in natural and engineered systems, including those with natural organic matter.
171. 题目: Contribution of Microbial Metabolism to Geogenic Phosphorus Enrichment in Groundwater: Insights from Metagenomic Sequencing and Organic Molecular Characterization 文章编号: N25053105 期刊: Environmental Science & Technology 作者: Junna Ning, Yao Du, Jin Wang, Wenhui Liu, Yamin Deng, Yiqun Gan, Yanxin Wang 更新时间: 2025-05-31 摘要: Microbial mediation in the enrichment of geogenic phosphorus (P) is often mentioned but rarely explored, especially in P enrichment processes through the mineralization of dissolved organic matter (DOM) containing natural P. To bridge the theoretical gap, this study investigated the mechanisms of P enrichment through microbially mediated mineralization of natural P-containing DOM by adopting an approach combining comprehensive field investigation with hydrochemical and molecular biological analyses. The co-analysis of the dominant microbial community compositions and genomics revealed that the microbial metabolism pathways involved in the biodegradation of P-containing DOM were associated with the enrichment level of dissolved inorganic phosphorus (DIP). Specifically, dephosphorylation was more pronounced under conditions of limited DIP, while C–P bond cleavage was the primary metabolic pathway under sufficient DIP. Co-occurrence network analysis further indicated that the substrates for DIP enrichment differed between dephosphorylation and C–P bond cleavage, namely CHONSP1 compounds in the region of highly unsaturated-low O compounds (AI ≤ 0.5, H/C < 1.5, and O/C < 0.4) and CHOP1 compounds in the region of highly unsaturated-high O compounds (AI ≤ 0.5, H/C < 1.5, and O/C ≥ 0.4), respectively. These findings provide new insights into geogenic P enrichment in groundwater from the perspective of microbial metabolism and have potential implications for the bioremediation of P-contaminated groundwater at different contamination levels.
172. 题目: The role of typical inorganic anions on the transformation of dissolved organic matters in catalytic ozonation 文章编号: N25053104 期刊: Separation and Purification Technology 作者: Min Li, Zhouyang Li, Liya Fu, Zhikai Qin, Changyong Wu 更新时间: 2025-05-31 摘要: Heterogeneous catalytic ozonation (HCO) is an effective technology for the advanced treatment of various industrial wastewater. The effect of different anions on dissolved organic matter (DOM) reactivity during the HCO process might vary considerably. However, the impact of this DOM conversion process induced by inorganic anions remains unclear. Herein, the effect of HCO3− and SO42− on DOM molecular changes in petrochemical wastewater by HCO was systematically investigated using spectroscopy, resin fraction, and FT–ICR MS techniques. HCO3− showed stronger inhibition of organics on degradation than SO42−, primarily due to the scavenging of reactive oxygen species. Moreover, HCO3− and SO42− favored the inhibition of hydrophobic fractions over hydrophilic fractions. At the molecular level, the similar effect of HCO3− and SO42− on HCO favored the conversion of compounds with lignins/CRAM-like to aliphatic/proteins and aromatic structures. The higher reactivity of HCO + HCO3− with low-unsaturated and high-oxidized compounds resulted in reduced oxygen addition reactions. HCO + SO42− promoted oxygen addition reactions due to facilitating the transformation of unsaturated DOM into more saturated aldehydes, ketones, and carboxylic acids. These findings highlight significant differences in HCO3− and SO42− effects on DOM transformation during HCO. Our study provides molecular-level insights into the behavioral changes of DOM during HCO induced by inorganic anions, helping guide the optimization of HCO processes for treating actual industrial wastewater.
173. 题目: Effective capture of uranium from highly fluoridated wastewater by Dictyophora indusiata-derived biochar and its derivative materials 文章编号: N25053103 期刊: Separation and Purification Technology 作者: Hairui Hou, Shuqin Wang, Lin Fang, Xiangxue Wang, Baowei Hu 更新时间: 2025-05-31 摘要: Extraction of uranium (U(Ⅵ)) from fluoride-rich radioactive wastewater is essential for nuclear energy development and environmental remediation. The current investigation delves into the viability of employing Dictyophora indusiata biochar (DIBC) materials modified with different chemical reagents (H3PO4, polyaniline, NaOH and KMnO4) for the effective capture of U(Ⅵ) from highly fluoridated wastewater. By comparing the effects of different modification methods, the KMnO4-modified DIBC (KM-DIBC) showed the most significant removal effect, which was attributed to its huge specific surface area, strong heterogeneity and a profusion of O-containing functional groups. The maximum removal capacity of U(Ⅵ) by KM-DIBC reached 182.90 mg·g−1, marking a remarkable enhancement of 2.15 times compared to the original DIBC, and the uptake capacity remained as high as 132.44 mg·g−1 even in an environment with high concentration of fluoride ions (c (F−) = 10 g·L−1). Furthermore, KM-DIBC exhibited excellent stability in complex environments where multiple ions coexist, further confirming its great potential for practical applications. Detailed studies and analyses have indicated that the mechanism by which KM-DIBC removes U(Ⅵ) likely encompasses a sophisticated interplay of cation-π interactions, electrostatic attraction, coordination and Lewis acid-base interactions. This investigation not only provides new materials and methods for the effective removal of U(Ⅵ) from high-fluoride wastewater, but also provides important theoretical basis and technical support in the field of environmental remediation and nuclear resource recovery.
174. 题目: In-situ synthesis of N-doped biochar from swine manure to activate peroxymonosulfate for efficient tetracycline degradation: The key role of electron transfer process 文章编号: N25053102 期刊: Separation and Purification Technology 作者: Fuhao Hu, Tianqi Wang, Ping Zhang, Yan Hu, Zhanli Chen, Bo Zeng, Fei Jiang, Shaohua Zhang 更新时间: 2025-05-31 摘要: Improper disposal of livestock manure and organic pollution in aquatic environments pose significant global threats. Herein, we propose a sustainable strategy for swine manure (SM) management by converting it in-situ into nitrogen-doped biochar via one-step pyrolysis at 750 °C (NBC750). The NBC750/peroxymonosulfate (PMS) system efficiently degraded organic pollutants, achieving complete tetracycline (TC) degradation with a reaction rate constant (kobs) of 0.33 min−1, surpassing most previously reported waste-derived heterogeneous catalytic systems. Notably, TC degradation was accelerated under specific environmental scenarios, particularly in the presence of HCO3− or at pH > 9, highlighting its adaptability to alkaline and bicarbonate-rich environments. Mechanistic studies confirmed two synergistic pathways: (1) Electron transfer dominated by graphitic N (62 % contribution), identified as the primary route; and (2) Radical pathways (38 % contribution), where C=O/O-C=O groups activate PMS to generate •OH and SO4•−. The NBC750/PMS system demonstrated high potential in practical applications, as suggested by its robust anti-interference capability and stable performance across various water matrices. This work provides an innovative and sustainable approach for in-situ preparation of N-doped biochar catalysts, enabling efficient water pollutant degradation while ensuring safe SM disposal and resource recovery.
175. 题目: Removal of aqueous As(Ⅴ) by biochar stabilized green synthesized iron nanoparticles: optimization, mechanism and DFT insights 文章编号: N25053101 期刊: Journal of Environmental Chemical Engineering 作者: Xueping Li, Hong Chen, Kun Rong, Qi Gao, Jianchao Jin, Shilai Yi, Qian Yang, Chunlong Sun, Ruimin Li, Zhenjiang Yin, Zaiwang Zhang 更新时间: 2025-05-31 摘要: As(V), the pentavalent form of arsenic, a common pollutant in mine wastewater, can be effectively removed using adsorption techniques. In this study, biochar stabilized Yali pear iron nanoparticles (RT-FeNPs@BC) were prepared from pear peel extract. The iron to carbon ratio, synthesis temperature and the solid-liquid extract separation method were optimized. FTIR, XRD, HR-TEM, XPS and SEM-EDS were employed for characterization. After biochar stabilization, RT-FeNPs were more evenly distributed on the surface of biochar, with reduced nanoparticle agglomeration. RT-FeNPs@BC contained the (111) and (220) crystal plane of Fe3O4. The effects of various parameters on As(V) removal by RT-FeNPs@BC were studied, including the reaction time, temperature, initial pH, initial As(V) concentration, material dosage, coexisting anions, cations, humic acids, river water and tap water. The presence of coexisting anions in natural water sources, such as a river or tap water, can enhance the removal of As(V) while coexisting cations or humic acids can reduce its removal. Under the conditions of a 60 ℃ reaction temperature and pH 5 solution, the maximum As(V) adsorption capacity (qm) by RT-FeNPs@BC reached 38.44 mg/g. The As(V) removal mechanisms included electrostatic attraction, hydroxyl iron formation, coordination reactions and co-precipitation. Density functional theory (DFT) calculations showed that the electrostatic attraction of Fe3O4(111)－H2AsO4- was greater than that of biochar－H2AsO4-. H2AsO4- could be adsorbed onto Fe3O4(111) or biochar in the monodentate, bidentate and tridentate configurations. H2AsO4- was likely to coordinate with Fe3O4(111) via two Fe-O-As bonds and one hydrogen bond or with C=O and -OH on biochar via three hydrogen bonds in the tridentate configuration.
176. 题目: Animal manure derived biochars synthesis, characterization and use for wastewater treatment and in agriculture: A recent review 文章编号: N25053013 期刊: Science of the Total Environment 作者: Samar Hadroug, Besma Khiari, Salah Jellali, Leila El-Bassi, Malik Al-Wardy, Wissem Hamdi, Mejdi Jeguirim 更新时间: 2025-05-30 摘要: Huge amounts of animal manure (AM) are annually produced worldwide with serious associated risks to both the environment and human health. The conversion of AM into valuable biochar for environmental and agricultural applications can boost circular economy and sustainability. However, the assessment of animal manure derived biochars (AMDBs) production, properties, and use for pollutants removal from liquid effluents as well as biofertilizers in agriculture is still lacking. Therefore, this review summarizes the latest progress on the role of manure type and production conditions on AMDBs characteristics and their effectiveness in removing both organic and mineral pollutants from wastewater and the related involved mechanisms during this process. Moreover, recent studies on AMDBs valorization in agriculture at laboratory and field scale are also analyzed. This review highlights the important role played by the chemical composition of the AM and the pyrolysis temperature and residence time on the structural, textural, and surface chemistry properties of AMDBs. Moreover, AMDBs modification with alkaline solutions or with metal slats can efficiently remove pollutants from aqueous effluents even under complex situations and through numerous combined mechanisms. Besides, AMDBs application in agriculture as biofertilizers can significantly enhance plant growth owing to the improvement of soil's properties, biological activity, and nutrient bioavailability. Finally, this review presents the main challenges and future research avenues regarding the cost-effectiveness production of AMDBs and sustainable valorization for environmental and agricultural applications.
177. 题目: Eutrophication‐induced dinoflagellate succession contributes to marine carbon sequestration through refractory dissolved organic matter accumulation 文章编号: N25053012 期刊: Limnology and Oceanography 作者: Fu‐Tao Fang, Zhuo‐Yi Zhu, Yuan‐Bi Yi, Ding He, Hong‐Yan Bao, En‐Ren Zhang, Cheng‐Xu Zhou 更新时间: 2025-05-30 摘要: The increasing eutrophication of coastal seas is causing a shift in the most important phytoplankton groups from diatoms to dinoflagellates, but its feedback to marine carbon cycling remains unclear. Here, we investigated the potential of the key coastal phytoplankton, the diatom Skeletonema costatum, and the dinoflagellate Prorocentrum donghaiense, for refractory dissolved organic carbon (DOC) accumulation over dark degradation incubations of 70 d. Our multi‐method approach showed that dinoflagellate detritus, rather than diatom detritus, significantly contributes to refractory DOC. This is evidenced by the fact that the detritus of dinoflagellates compared to that of diatoms (1) has a weaker transmittance in infrared spectrometry, indicating a lower content of labile organic substances (alcohol and amide groups); (2) has a higher release and/or transformation efficiency of particulate organic carbon to DOC (81% vs. 50%); (3) has a lower content of labile fraction, amino acid (8% vs. 17% carbon) and exhibits lower degradability of the DOC formed (23% vs. 30%); (4) has a lower content of labile compounds determined by Fourier transform ion cyclotron resonance mass spectrometry (maximum molecular lability boundary: 21% vs. 31%); and (5) has a higher proportion of refractory carboxylic‐rich alicyclic molecules (57% ± 0.5% vs. 51% ± 0.7%) over incubations. Our results emphasize that eutrophication‐triggered coastal dinoflagellate succession has a significant potential for positive feedback to carbon sequestration through the formation of refractory DOC.
178. 题目: Control of Effluent Organic Matter, Cytotoxicity, and Disinfection Byproducts in Wastewater with Biological Anion Exchange Resins: Enhanced Performance through Skeleton Design 文章编号: N25053011 期刊: Environmental Science & Technology 作者: Xingqi Zhu, Lu Jiang, Ye-chao Tian, Yang Pan, Wen-tao Li, Chendong Shuang, Rong Ji, Aimin Li 更新时间: 2025-05-30 摘要: Effluent organic matter (EfOM) in wastewater threatens ecosystems and drinking water safety via the urban water cycle. Biofiltration using adsorbents with dual adsorption–biodegradation functions, such as biological anion exchange resins (BAERs), offers a promising solution. Compared to biological activated carbon (BAC), BAERs’ adjustable skeletons enable targeted EfOM removal. This study designed two BAERs with polystyrene (PS-AER) and magnetic polyacrylic (MPA-AER) skeletons and compared them with conventional polyacrylic BAER (PA-AER) and BACs. During 12 000-bed-volume field applications, BAERs demonstrated 1.7–2.6 and 1.6–2.6 times higher dissolved organic carbon (DOC) and UV254 removal rates than BACs. This efficacy stemmed from the high concentration of negatively charged components, which BAERs effectively attract. Furthermore, skeleton modifications improved DOC removal by 15.3–17.2% and UV254 removal by 7.3–18.2% for PS-AER and MPA-AER, compared to PA-AER. The MPA-AER’s open pore structure enhanced diffusion of high molecular weight components, while PS-AER’s enhanced hydrophobicity improved aromatic component removal. These structural changes also influenced the biological effects of BAERs. Notably, the enhanced performance of PS-AER and MPA-AER reduced wastewater cytotoxicity and controlled the production of disinfection byproducts. Overall, this study confirms the potential of BAERs in wastewater treatment and highlights strategies for performance enhancement through skeleton modification.
179. 题目: Catalytic adsorption of NO2 at low concentration range from indoor environment using Modified-laterite biochar composite 文章编号: N25053010 期刊: Chemical Engineering Journal 作者: Abhishek Verma, Prashant Singh, Abhijit Maiti 更新时间: 2025-05-30 摘要: Indoor pollution of nitrogen dioxide poses severe human and environmental health risks, among other gaseous pollutants, and it causes diseases like cancer, respiratory problems, and breathing difficulties. The pollutant adsorption is one of the effective purification techniques using transition metal oxides or carbonic compounds. The biochar has been derived from Cannabis sativa (Hemp) stems, which have been pyrolyzed at 400 ℃. Prepared biochar has been incorporated with 10–80 wt% modified laterite rock nanocomposite to enhance its ability to adsorb NO2. Precipitation of mixed metal oxyhydroxides from the leached solution onto biochar at a pH of 6 to 7 produces a modified laterite-biochar (MLBC) composite, which is an organometallic compound. The modification of the biochar causes an increase in NO2 adsorption capacity from 0.079 mg/g to 14.65 mg/g of MLBC composite at a 500 ppb inlet concentration of NO2 in air, with the added benefit of no nitrogen monoxide (NO) generation during adsorption on MLBC composite. In contrast, pristine biochar generates NO during the adsorption of NO2. The column study was done at different inlet concentrations of NO2 and inlet air flow rates, with varying fixed-bed heights of the adsorbent. Fresh and spent adsorbents were characterized using XRD, SEM, BET, FTIR, XPS, EDS, and EPR. The adsorbent was regenerated by washing it in 0.1 M NaOH and then rinsing it with water, though, after five cycles, the adsorption affinity had decreased by 50 %. XPS and FTIR analyses were used to understand the NO2 adsorption mechanism on the composite adsorbent surface, which suggested that NO2 has been adsorbed as Fe N /Fe on the surface of the metal oxyhydroxide. The composite adsorbent shows much superior NO2 than its individual counterparts.
180. 题目: Lead and cadmium adsorption by Phanerochaete chrysosporium under the protection of phosphorus-containing biochar: effects and mechanisms 文章编号: N25053009 期刊: Journal of Environmental Chemical Engineering 作者: Yayuan Liu, Liang Hu, Ni He, Zuopei Jiang, Jingyi Gong, Chunyangzi Jiang, Hongbo Zhao 更新时间: 2025-05-30 摘要: Microbial induced phosphate precipitation (MIPP) is an effective method to the remediation of heavy metals pollution. With the development of China's smelting and processing industry, lead and cadmium have caused cumulative pollution in many areas. In this study, biochar prepared by co-pyrolysis of hydroxyapatite and activated sludge was self-assembled with Phanerochaete chrysosporium (PC) to form mycelial spheres for adsorption of Pb2+ and Cd2+ in aqueous solution. The removal rates reached 79.37% and 73.73% in 300 mg/L Pb2+ and 80 mg/L Cd2+ solution, respectively, which were significantly improved 51%－355% compared to microorganisms and biochar alone, and Pb2+ was preferentially removed over Cd2+ in the mixed solution. Biochar promoted the production of oxalic acid by PC to dissolve phosphates, which combined with Pb2+ and Cd2+ to produce substances such as lead oxalate (PbC2O4), lead hydroxyphosphate (Pb5(PO4)3OH), and potassium cadmium phosphate (K2CdP2O7). The study confirmed that the composite mycelium spheres efficiently removed Pb2+ and Cd2+ through the mechanisms of surface adsorption, functional group complexation, and coprecipitation reaction, and provided a new method to simultaneously reuse activated sludge and remediate heavy metal pollution.
