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121. 题目: 9.5 years of whole-soil warming had minor effects on composition of subsoil mineral-associated organic matter
文章编号: N26090216
期刊: Soil Biology and Biochemistry
作者: Binyan Sun, Margaret S Torn, Guido L B Wiesenberg
更新时间: 2026-09-02
摘要: Soil depth and climate shape the amount, sources, and composition of soil organic carbon (SOC), thereby governing its persistence and turnover. However, little is known about how these characteristics respond to changes in climate or plant inputs. SOC is primarily composed of two physicochemical fractions: Free particulate organic matter (fPOM) and mineral-associated organic matter (MAOM). Approximately half of total SOC is stored in subsoils (>30 cm), where MAOM contributes substantially to total SOC. The relative persistence and predominance of MAOM suggest that this pool may be particularly important in constraining warming-induced SOC loss in subsoils. Nevertheless, empirical evidence for its response to long-term warming remains limited.

122. 题目: Divergent molecular transformation networks converge on enhanced halogenated DOM formation in lakes under anthropogenic pressure: Insights across China and the United States
文章编号: N26090215
期刊: Water Research
作者: Chao Zhang, Junyu Zhu, Wenjie Mai, Yue Xie, Huan Chen, Harald Horn, Haijun He, Zhe Zhang, Mingzhi Huang, Fengchang Wu
更新时间: 2026-09-02
摘要: Halogenated dissolved organic matter (HDOM) is considered one of the most toxic fractions of DOM, as it potentially contributes to the formation of disinfection byproducts, which are documented to pose serious risks to water safety. Previous studies mainly focused on bulk DOM transformation and characterized its molecular diversity, while less attention has been given to the formation mechanisms and environmental drivers of HDOM that plays a key role in toxicity outcomes, particularly in lake systems relied upon as human water sources. Here, we elucidated molecular HDOM transformation dynamics in selected lakes in China and the U.S. using FT-ICR MS, interpretable machine learning, and PageRank molecular transformation networks. Results suggest that DOM halogenation in selected lakes from both countries is consistently dominated by oxidation-mediated pathways, enhancing the pool of halogenated precursors relevant to potential disinfection byproducts formation. Molecular networks reveal that dehalogenation and halogenation in U.S. lakes exhibit selective localized transformations, while Chinese lakes follow interconnected pathways, revealing region-specific biogeochemical behaviors of HDOM under anthropogenic pressures and molecular diversity. However, despite divergent molecular networks and pathways, lakes subjected to inevitably intense anthropogenic pressures in both countries exhibit a consistent tendency toward enhanced halogenation (increased toxicity) and accelerated carbon cycling. DOM structure (aromaticity, aliphaticity, and unsaturation) strongly regulates halogenation reactivity in lakes. Specifically, iodination preferentially targets electron-rich aromatic functional groups, whereas chlorination and bromination exhibit broader reactivity across both aromatic and aliphatic structures. This study provides cross-regional insights into how anthropogenic pressures regulate molecular pathways underlying HDOM transformation.

123. 题目: Chlorination-driven leaching and characterization of dissolved organic matter from PVC microplastics
文章编号: N26090214
期刊: Science of the Total Environment
作者: Shimaa M Kteeba, Samantha J Krueger, Laodong Guo
更新时间: 2026-09-02
摘要: Polyvinyl chloride (PVC) is one of the most widely used plastic polymers in drinking-water distribution systems. Despite its prevalence, the synergistic influence of chlorine disinfectants and environmental stressors on PVC degradation and the chlorination-driven release of dissolved organic matter (DOM) remains poorly quantified. Leaching experiments using PVC-microplastics (PVC-MPs) were conducted in both ultrapure-water and river-water media with various chlorine concentrations under water, thermal, and UV irradiation conditions to characterize chlorine- and leaching condition-dependent shifts in dissolved organic carbon (DOC), chromophoric DOM (CDOM), fluorescence excitation–emission matrices (EEMs), and other surface and optical properties, including size, Zeta-potential, spectral slope (S275–295), specific-UV-absorbance at 254 nm (SUVA₂₅₄), and PARAFAC-derived fluorescent components. Significant morphological alterations on PVC-MPs surfaces were observed under all leaching conditions, demonstrating the susceptibility of PVC to oxidative and photolytic aging. Distinct patterns emerged across leaching conditions: water leaching consistently yielded the highest DOM release in both CDOM and DOC, particularly during early stages, characterized by higher molecular weight and greater aromaticity relative to thermally and UV-induced leaching. Fluorescence EEM spectra were dominated by protein-like and humic-like components, with fluorescence intensities increasing systematically with both chlorine concentration and leaching duration. Higher chlorine levels generally maintained DOM at nano-sizes below 400 nm. By integrating controlled chlorine exposure, multiple environmental stressors, natural water matrices, and advanced optical–fluorescence characterization, this study provides new insights into PVC-MPs degradation pathways and their implications for drinking-water disinfection practices, distribution system performance, and aquatic environmental quality.

124. 题目: Soil organic carbon mineralization in Liaohe wetland water-nitrogen responses and driving mechanisms under contrasting inundation histories
文章编号: N26090213
期刊: Catena
作者: Liaoyuan Qu, Yanru Sun, Dongmei Zheng, Xiaojun Yang, Jingyi Lv, Xinru Yang, Xingming Wang
更新时间: 2026-09-02
摘要: The inundation history experienced by soils during their long-term formation profoundly affects soil organic carbon (SOC) mineralization through hydrological legacy effects. However, previous studies have largely focused on the single-factor effects of water or nitrogen, obscuring differences in water‑nitrogen interaction mechanisms across soils with distinct flooding histories. In this study, non-flooded soils (Q1) (meadow soil, CD; maize soil, YM) and flooded soils (Q2) (marsh soil, ZZ; paddy soil, SD) from the Qixing Wetland in the Liaohe River Basin were subjected to a two-factor laboratory incubation with three moisture levels (30%, 60%, and 100% field capacity) and three nitrogen addition rates (10, 15, and 30 mg N·kg−1). The results showed that: (1) Inundation history was the core factor reshaping the mineralization response pattern. (2) Saturated moisture (100% FC) consistently inhibited mineralization across all four soil types, while nitrogen exhibited dose-dependent and moisture-dependent effects (water × nitrogen interaction, p < 0.01). (3) The causal pathways driving mineralization by water and nitrogen differed markedly between the two soil groups. In non-flooded soils, moisture indirectly inhibited mineralization primarily by reducing carbon fraction availability (indirect effect β = −0.381), DOC was positively correlated with mineralization (r = 0.334), and pH was the strongest direct positive factor (β = 0.698). In flooded soils, the dominant effect of moisture shifted to direct physicochemical inhibition of mineralization (β = −0.428), the indirect pathways through carbon and nitrogen fractions were no longer significant, and sucrase emerged as an important direct driver (β = 0.284, r = 0.410). This study reveals the influence of inundation history on SOC mineralization under coupled water‑nitrogen conditions, providing experimental evidence for future assessment of wetland carbon pool stability.

125. 题目: Hydrological inundation legacy restructures depth-dependent stabilization of particulate and mineral-associated organic carbon under vegetation restoration in reservoir riparian soils
文章编号: N26090212
期刊: Catena
作者: Kai Zhu, Guoxin Chu, Yupeng Wang, Jiaqing Liu, Wenliu Zhang, Ming Lu, Shengjun Wu, Kang Dan, Yulin Wang, Ping Huang
更新时间: 2026-09-02
摘要: Hydrological inundation legacy (HIL) plays an important role in regulating soil carbon dynamics in reservoir riparian zones, yet its influence on the depth-dependent stabilization of particulate and mineral-associated organic carbon (MAOC) under vegetation restoration (VR) remains insufficiently understood. In this study, we investigated vertical patterns of soil carbon fractions along an elevation gradient in the riparian zone of the Three Gorges Reservoir. Carbon fractionation, variance partitioning, interaction analysis, and partial least squares path modeling were applied across five soil layers (0–100 cm). Soil depth was the dominant factor structuring carbon distribution, uniquely explaining 57.85%, 54.93%, and 40.53% of the variation in SOC, POC, and MAOC, respectively, whereas HIL and VR accounted for smaller unique fractions. Residual variation was 25.29%, 29.95%, and 42.23% for SOC, POC, and MAOC, respectively. The concentrations of POC and MAOC both declined with depth, but POC declined more rapidly, resulting in an increasing proportional contribution of MAOC to SOC along the soil profile. Exploratory PLS-PM showed negative conditional associations of HIL with surface (0–40 cm) and subsoil (40–100 cm) POC (−0.481 and − 0.748, respectively) and MAOC (−0.727 and − 0.444, respectively). Vegetation restoration effects were strongly dependent on elevation and soil depth. At 173 m, surface SOC under passive restoration reached 17–18 g kg−1, compared with 9–10 g kg−1 under active restoration. The exploratory association of VR with subsoil POC was negative (−0.517). Overall, soil depth was the dominant control of soil carbon fractions, whereas HIL and VR showed carbon-pool- and depth-dependent effects. These findings highlight the need to consider contrasting responses of surface and subsoil carbon pools when developing carbon management and ecological restoration strategies in riparian zones.

126. 题目: Electric-field-assisted low-temperature catalytic oxidation of toluene over Co3O4-modified biochar
文章编号: N26090211
期刊: Journal of Environmental Chemical Engineering
作者: Shuang Wang, Yue Lyu, Jingying Xu
更新时间: 2026-09-02
摘要: The catalytic oxidation of volatile organic compounds (VOCs) is often hindered by high reaction temperatures and substantial energy consumption. Herein, we investigate the electric-field-assisted low-temperature catalytic oxidation of toluene over Co3O4-modified biochar to elucidate its performance and underlying mechanisms. The optimized catalyst (AC-6-Co3O4, ~18 wt% loading) exhibited exceptional performance under a 10 W input power, achieving 94.5% toluene conversion and 85.8% CO2 selectivity. Notably, the temperature required for 90% conversion (T90) was significantly reduced by 73.2 °C compared to conventional thermal catalysis. Structural characterizations revealed that the electric-field-assisted reaction beneficially modulated the catalyst, increasing its specific surface area and enriching both chemisorbed oxygen and surface Co3+ species. Furthermore, density functional theory (DFT) calculations demonstrated that the external electric field regulates interfacial charge distribution, strengthens the adsorption of toluene and O2, and significantly lowers the activation barriers for key steps, including methyl C–H dehydrogenation and benzoate decarboxylation. This work provides critical mechanistic insights into the energy-efficient, electric-field-driven catalytic removal of aromatic VOCs.

127. 题目: Catalytic ozonation with N, S co-doped sludge biochar for decontamination: Performance and mechanistic insights
文章编号: N26090210
期刊: Journal of Environmental Chemical Engineering
作者: Xinyi Tao, Weiwei Chen, Xuehong Fan, Rui Hu, Xuejian Wang, Shiquan Sun, Yu-Hong Cui, Zheng-Qian Liu
更新时间: 2026-09-02
摘要: Waste-derived biochar catalysts are widely used in catalytic ozonation. However, biochar is often constrained by insufficient surface active sites and low interfacial electron transfer efficiency. In this work, nitrogen (N) and sulfur (S) co-doped sediment-derived biochar (C-N1S2-600) was prepared by one-step pyrolysis using a mixed compost of black-odorous sediment, reed straw, and food waste as precursors, with melamine and thiourea using as the N and S sources, respectively. The optimized C-N1S2-600 has a well-developed mesoporous structure, abundant structural defects, and numerous reactive sites originating from N/S–C coordination. Ozonation with C-N1S2-600 achieved 62.8% Deethylatrazine degradation, which was significantly higher than that of ozonation alone (13.9%) and ozonation with pristine biochar (33.1%). C-N1S2-600 also exhibited excellent reusability over five consecutive cycles and maintained high performance in secondary effluent. Reactive species identification confirmed that C-N1S2-600 facilitated the conversion of O3 into •OH. Theoretical calculations further revealed that N, S co-doping induced a more non-uniform surface charge distribution and narrowed the orbital energy gap, providing electronic-level insights into enhanced O3 adsorption, interfacial electron transfer, and reactive oxygen species generation. C-N1S2-600 exhibited good operational stability and tolerance to matrix interference under the tested conditions. This study provides a feasible strategy for converting solid-waste-derived biochar into efficient carbonaceous catalysts for advanced wastewater treatment, and offers a promising strategy for micropollutant abatement and wastewater purification by catalytic ozonation with high-performance biochar catalyst.

128. 题目: Labile carbon input suppresses Q10 of soil organic carbon decomposition by dynamically lowering microbial activation energy mediated by a shift in microbial metabolic strategy
文章编号: N26090209
期刊: Geoderma
作者: Chaoyang Liu, Ziquan Wang, Haixia Tian, Xinhua He, Mallavarapu Megharaj, Minggang Xu, Wenxiang He
更新时间: 2026-09-02
摘要: Understanding the temperature sensitivity (Q10) of soil organic carbon (SOC) decomposition, as constrained by the activation energy (Ea) of microbial metabolism, is critical for predicting climate-carbon feedbacks. This study examined how exogenous glucose influences Q10 in farmland soils across China’s major climatic zones under controlled temperatures (20, 30, 40 °C). β-glucosidase activity, microbial biomass carbon (MBC), and CO2 flux were measured during a 59-day incubation experiment. Glucose addition significantly stimulated β-glucosidase activity, particularly at 40 °C, and increased CO2 emissions by 2.21–6.50 times relative to controls. Despite enhanced microbial activity, glucose consistently reduced apparent Q10 values (1.31–1.59 vs. 1.67–1.94 in the controls). This decrease was accompanied by lower apparent Ea values (21.2–36.7 kJ mol−1 vs. 35.3–50.9 kJ mol−1), suggesting that labile C inputs may shift microbial metabolism toward energetically favourable and rapidly mineralizable substrates, potentially reducing the relative contribution of higher-Ea decomposition processes associated with native SOC. MBC peaked between days 3 and 29 and declined by 8.31–19.35 % by day 59. Under glucose-free conditions, this decline coincided with increasing apparent Ea. This pattern may suggest a greater reliance on enzyme-mediated decomposition of relatively recalcitrant C substrates under C-limited conditions. Mantel test analysis identified mean annual temperature, precipitation, clay content, available phosphorus, and available nitrogen as the main drivers of Q10 variability, highlighting environmental regulation of the Ea–Q10 relationship. Overall, these results demonstrate that apparent Ea is dynamically regulated by substrate availability, microbial strategies, and soil properties. Consequently, Q10 reflects not only as a function of substrate chemistry, but also the thermodynamic state of microbial metabolism. By identifying apparent Ea as a mechanistic link between microbial physiology, environmental conditions, and carbon-climate feedbacks, this study provides a stronger basis for improving SOC decomposition models.

129. 题目: Novel defluorination assisted physical activation of fluorinated biochar for CO2 adsorption and supercapacitors
文章编号: N26090208
期刊: Bioresource Technology
作者: Chaehun Lim, In Woo Lee, Eunseon Chae, Sangyeop Lee, Yunhua Yu, Xiaoping Yang, Young-Seak Lee
更新时间: 2026-09-02
摘要: The low-temperature CO2 activation of biochar, assisted by fluorination-defluorination reactions, is reported for the first time. Coconut shell-based biochar was fluorinated at room temperature for 15, 30, 60 min and subsequently activated with CO2 gas to produce activated carbon. The resulting activated carbon had 2.06 times larger specific surface area than the activated carbon obtained from pristine biochar under the same activation conditions. Moreover, the fluorination pretreatment promoted carbon gasification and pore development under CO2 at lower treatment temperatures than those required for pristine biochar. The defluorination-assisted CO2 activation mechanisms are proposed based on analytical results and the reaction mechanism between CO2 gas and fluorine radicals. Moreover, the applicability of the resulting activated carbon in CO2 adsorption and supercapacitors was evaluated. The performance of the activated carbon sample in these applications was affected by its distinctive pore structure. This study provides a novel method for the physical activation of carbon materials.

130. 题目: Engineering heteroatom-enriched biochar from papermaking sludge and spent coffee grounds for tetracycline removal with experimental and DFT mechanistic investigation
文章编号: N26090207
期刊: Separation and Purification Technology
作者: Hairong Mo, Chenghong Wu, Kaiyu Yang, Keyuan Song, Xu Wei, Kangyong Lu, Yanmei Huang, Dan Zhou, Linlin Wang
更新时间: 2026-09-02
摘要: Valorizing solid wastes into functional biochar adsorbents represents a sustainable and cost-effective strategy for practical antibiotic-contaminated wastewater treatment. Here, a heteroatom-enriched biochar, CP-BC-KOH, was prepared by co-pyrolysis of papermaking sludge and spent coffee grounds with KOH activation for tetracycline (TC) removal. This strategy promoted pore development and enriched oxygen- and nitrogen-containing functional groups, yielding a specific surface area of 101.12 m2·g−1 for CP-BC-KOH, 3.3 times that of sludge-derived BC. CP-BC-KOH exhibited the highest TC adsorption capacity among the prepared biochars, reaching 384.22 mg·g−1. The adsorption kinetics and isotherms were well fitted by the pseudo-second-order and Langmuir models, respectively, while thermodynamic analysis indicated a spontaneous and endothermic process. Combined characterization and density functional theory calculations indicated that the enhanced TC adsorption originated from improved pore structure and strengthened hydrogen-bonding interactions enabled by O/N heteroatom enrichment. These findings provide mechanistic insight into the design of waste-derived biochar adsorbents for antibiotic-contaminated water treatment.

131. 题目: Phosphate-engineered MOF-biochar hybrid from agricultural waste: Ultrafast strontium capture for nuclear wastewater remediation
文章编号: N26090206
期刊: Separation and Purification Technology
作者: Fangdi Huang, Guilin He, Xiang Zhu, Pengyuan Chen, Zhencheng Li, Zedong Wu, Nannan Wang, Xinpeng Wang, Yanqiu Zhu
更新时间: 2026-09-02
摘要: To efficiently treat 90Sr contamination in radioactive wastewater, this study innovatively synthesized a green and environmentally friendly, highly efficient phosphorus-adsorbing metal-organic framework/biochar composite material (SHMP-MOF-808@CMB). MOF-808 provided abundant binding sites, and CMB enhanced electrostatic attraction by enriching carboxyl groups. SHMP introduces exchangeable Na+ and highly active phosphate groups. Performance tests show that this composite material exhibits outstanding Sr2+ adsorption performance: it can reach adsorption equilibrium within 3 min and has a maximum adsorption capacity of 160.4 mg/g. It maintains a high adsorption capacity within a wide acid-base range of pH 2 to 10 (peaking at 158.53 mg/g at pH 5) and has excellent resistance to ionic interference. After five adsorption-desorption cycles, its Sr2+ removal efficiency remained at 74.95%. Application tests in actual river water and seawater substrates show that the removal rate of Sr2+ reaches 80.5% and 69.1%, respectively. Combined with XPS, sXAS, EDS, and DFT calculations, it was confirmed that the adsorption mechanism mainly involves the coordination between Sr2+ and phosphate groups and the ion exchange with Na+. This study utilized agricultural waste as the raw material to develop a new type of adsorption material with high adsorption efficiency, stability, and sustainability. By incorporating abundant cow manure biochar as a structural matrix, the reliance on expensive MOF precursors is substantially reduced, endowing the composite with significant economic advantages over pure MOF adsorbents. It provides an innovative, rapid, and sustainable waste-to-resource solution and theoretical support for the low-cost treatment of radioactive wastewater.

132. 题目: Recent advances in CO2 capture by biochar: modification strategies and triple-aspect synergy mechanism
文章编号: N26090205
期刊: Separation and Purification Technology
作者: Guanyun Yang, Chao Qu, Lefei Chen, Kexin Shi, Hanning Yang, Quanyou Guo, Qing Ye
更新时间: 2026-09-02
摘要: Biochar has emerged as a promising low-cost carbonaceous adsorbent for CO2 capture. Nevertheless, pristine biochar generally exhibits inherent drawbacks, including insufficient ultramicroporosity, limited surface chemical functionality, and poor adaptability under realistic operating conditions, which severely restrict its CO2 capture performance. This review systematically summarizes recent advances in biochar modification strategies, including activation, microwave-assisted treatment, heteroatom doping, metal functionalization, and emerging approaches. A triple-aspect synergy framework is proposed, emphasizing the cooperative roles and inherent trade-offs among ultramicropores, surface basic/polar sites, and heterointerfaces in governing CO2 capture performance. The structure–property relationships underlying different modification pathways are critically discussed, highlighting how pore structure, surface chemistry, and heterointerfacial effects collectively govern CO2 uptake, selectivity, cyclic stability, and performance under realistic operating conditions. Although significant advances have been made in laboratory-scale performance optimization, practical deployment remains hindered by limited validation under realistic conditions, inadequate engineering translation, and insufficient techno-economic and life-cycle assessments. Future research should focus on achieving balanced performance across multiple criteria, green and scalable modification methods, precise control of active sites and heterointerfaces, and humidity-tolerant adsorbent design. This review provides a unified perspective for rational biochar engineering and offers guidance for the development of application-oriented adsorbents for practical CO2 capture.

133. 题目: Optimized design of ozone microbubble aeration reactor to enhance the removal of dissolved organic matter: A pilot-scale study on drinking water treatment
文章编号: N26090204
期刊: Journal of Environmental Management
作者: Jinmin Su, Tao Lin, Han Chen, Wei Liu, Yuchen Wang, Yimu Qiao
更新时间: 2026-09-02
摘要: The application of microbubbles (MBs) in ozone contactors improves pollutant removal efficiency. However, conventional MB generation methods significantly increase maintenance and operational costs. This study discusses the application of ceramic membranes for ozone microbubble aeration. Effluent from a sedimentation tank was used as the influent to a pilot-scale system, and the system's degradation capacity for dissolved organic matter (DOM) was compared under different aeration systems and operating conditions. Analysis of the effluent using parallel factor analysis (PARAFAC) and LC-OCD revealed that the ceramic membrane aeration system enhances DOM degradation efficiency. This study confirmed that, unlike titanium diffusers, ceramic membranes are not directly arranged at the bottom of the ozone contactor. The results indicate that appropriately increasing the height of the ceramic membrane arrangement improves the ozone mass transfer rate. The flow-guiding effect of the ceramic membranes can be utilised to improve ozone concentration uniformity. The reaction of hydroxyl groups on the ceramic membrane surface with liquid-phase ozone also generates additional •OH radicals. Through degradation experiments with atrazine (ATZ), we found that ceramic membrane aeration offers promising potential to improve organic pollutant removal in water and reduce system energy consumption. Furthermore, the additional pressure required for ceramic membrane use does not increase energy consumption. The ceramic membrane aeration method is easier to implement and more environmentally friendly than other microbubble generation methods.

134. 题目: Defend or divert: Reactive oxygen species signaling drives opposite EPS strategies in marine bacteria under nanoplastic stress
文章编号: N26090203
期刊: Journal of Hazardous Materials
作者: Yange Wang, Cun Xiong, JinXi Wang, Chengyi Hong, Hao Qiu, Yuping Qiu
更新时间: 2026-09-02
摘要: Nanoplastic pollution represents a pervasive threat to marine ecosystems, yet the molecular mechanisms governing microbial adaptation remain elusive. This study reveals how reactive oxygen species (ROS) signaling drives opposite extracellular polymeric substance (EPS) strategies in marine bacteria under NP stress. Pseudomonas aeruginosa enacts a proactive defend strategy, increasing EPS secretion by 6.66%–53.17%. Driven by a ROS surge, it allocates resources to EPS precursors and maintains transcriptional homeostasis through global fine-tuning to secure protein homeostasis and energy stability. Conversely, Bacillus subtilis undergoes a rapid metabolic divert response, causing a persistent EPS inhibition of 18.49%–27.31%. By systematically redirecting carbon and nitrogen fluxes away from EPS production through the downregulation of precursor-supplying pathways, this strain diverts energy and metabolic precursors toward emergency survival pathways such as membrane homeostasis maintenance, cellular stress protection, and sporulation. Our defend or divert framework provides a mechanistic paradigm for assessing how emerging contaminants dictate cellular resource allocation and reshape the ecological trajectory of marine microbial communities.

135. 题目: La-modified alkali-activated substrate derived from fly ash with biochar incorporation for phosphorus removal: Morphology control and La bonding mechanisms
文章编号: N26090202
期刊: Environmental Technology & Innovation
作者: Junda Quan, Sha Liang, Xinpeng Zhang, Yihang Cui, Wenbo Yu, Huabo Duan, Chenqiong Ye, Peng Cheng, Yanwen Zhang, Jie Hao, Qiulin Qin, Xuxu Zhou, Jiakuan Yang
更新时间: 2026-09-02
摘要: Developing bulk substrates with high phosphorus (P) removal efficiency remains a critical bottleneck in constructed wetlands (CWs). In this study, alkaline-activated substrates (FBG) modified by lanthanum (La) for effective P removal were synthesized from fly ash and sludge biochar utilizing over 80 wt% of industrial solid wastes. The incorporation of biochar enlarged the mesoporous structure (D = 23.66 nm) of FBG while maintaining a high compressive strength (36.16 MPa). Two La modification strategies, oscillation-assisted precipitation (O-La-FBG) and ultrasound-assisted dispersion (U-La-FBG), were systematically compared. O-La-FBG yielded La(OH)3 agglomerates favoring a higher P adsorption capacity (3.34 mg/g), whereas U-La-FBG generated well-defined La(OH)3 nanoflowers with a more exceptional La utilization efficiency (209 mg P/g La). Theoretical calculations of the bonding state of La on the substrates indicated that La(OH)3 species were significantly more reactive toward silicon-oxygen species than structurally stable aluminum-oxygen tetrahedrons. XPS and FTIR analyses revealed the P adsorption mechanism dominated by electrostatic attraction and inner-sphere ligand exchange between protonated La(OH)2+ and H2PO4-. Furthermore, a 30-day dynamic column study validated that although U-La-FBG offered higher La utilization efficiency, O-La-FBG was more suitable for long-term applications in CWs, with both consistently reducing effluent P concentration to below 0.2 mg/L. Overall, this study provides a sustainable management option for recycling solid wastes into functional materials for P removal and realizing the waste to resources strategy. The bulk La-modified substrates could mitigate the bed clogging observed in continuous-flow systems, while providing P adsorption capacity for treating micro-polluted water bodies in the actual operation of CWs.

136. 题目: Quantifying surface topography helps reveal the combined effects of microplastics UV-aging and organic matter on trace metal adsorption in seawater
文章编号: N26090201
期刊: Marine Pollution Bulletin
作者: Petra Vukosav, Ana Rapljenović, Sunčana Geček, Ivan Vukosav, Vlado Cuculić
更新时间: 2026-09-02
摘要: This study explores the impact of UV-aging and organic matter (humic acid - HA) on adsorption of essential (Cu, Co, Ni) and nonessential (Cd, Pb) trace metals onto microplastics (MPs), polypropylene (PP) and polystyrene (PS), in seawater. Surface characterization using atomic force microscopy (AFM), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) revealed that UV aging significantly alters microplastic surface properties. AFM measurements show an increase in both surface roughness and surface area under UV radiation. This increase strongly correlated with enhanced metal adsorption, with uptake varying according to polymer type and aging state. Surface transformations upon prolonged MPs aging significantly altered the preferences of Cd, Co and Cu in adsorption dynamics.

137. 题目: Interpretable Machine Learning and DFT Validation of Fe-Mn/Graphene Biochar Gel for Sb(III) Adsorption and Oxidation
文章编号: N26090120
期刊: Environmental Technology & Innovation
作者: Chaojie Wang, Zheng Fang, Wenhui Lin, Hanbo Chen, Juan Liu, Chenghua Sun, Yurong Gao, Hailong Wang
更新时间: 2026-09-01
摘要: A Fe-Mn oxide and graphene co-modified biochar gel (FMBG) was successfully developed for highly efficient antimony (Sb) removal from water matrixes through coupled adsorption and partial oxidation. Compared with pristine biochar (BC), FMBG exhibited a markedly enhanced maximum adsorption capacity of 30.84mgg-1 and maintained high removal performance over a wide pH range (1-11). Furthermore, chemical regeneration (HCl/NaOH) fully restored FMBG’s capacity (~11.1–11.2mgg-1), confirming excellent reusability. Moreover, FMBG exhibited superior matrix stability and low secondary pollution risk, maintaining minimal Fe and Mn leaching (≤ 0.65mgL-1 and ≤ 0.38mgL-1, respectively) across neutral, alkaline, and secondary adsorption conditions. FTIR and XPS results revealed that Sb(III) removal was governed by inner-sphere complexation through Fe-O-Sb and Mn-O-Sb linkages, accompanied by an efficient interfacial redox conversion where Sb(V) dominated 65.31% of the surface-immobilized Sb. Explainable Artificial Intelligence (XAI) identified that the Fe-Mn loading, pH, and graphene incorporation acted as the dominant factors controlling adsorption performance. Density functional theory (DFT) calculations demonstrated that Fe-rich and Fe–O–Mn bridged oxo sites provide the most favorable configurations for initial Sb(III) capture, which subsequently undergoes interfacial oxidation to Sb(V) to achieve a thermodynamically more stable surface complex (0.48–1.16eV additional stabilization). This oxidation-driven enhancement stems from local charge redistribution across the asymmetric Fe–O–Mn bridge, higher oxygen coordination, and an expanded hydrogen-bonding and Fe/Mn–O–Sb inner-sphere network, establishing a sequential capture–oxidation–stabilization mechanism. This work establishes a pioneering framework which combined experiments, machine learning and DFT calculation for highlg efficient Sb(III) removal by FMBG, offering a novel strategy for designing multifunctional adsorbents for wastewater treatment.

138. 题目: The response of organic matter in Pennsylvanian coals in the North China Basin to rapid heating by magmatic intrusion
文章编号: N26090119
期刊: Organic Geochemistry
作者: Bangjun Liu, Jiazhong Huang, James C Hower, Achim Bechtel, Vivian A Edwards, Wenmu Guo, Zeqi Tian, Shiming Liu, Lin Xiao, Cunliang Zhao
更新时间: 2026-09-01
摘要: Changes in organic matter during conventional burial are expected to differ from those induced by rapid, high-temperature heating during magmatic events. This study investigated coal seam profiles in the southern North China Basin directly affected by magmatic intrusion, focusing on the thermal response of organic matter and the protective role of a mudstone barrier. Magma-affected coals differ markedly from the overlying unaltered high-volatile bituminous coal, and are characterized by low ash yield, ultra-low moisture and volatile matter. Samples close to the intrusion locally show abnormal increases in ash yield and volatile matter, interpreted to reflect carbonate mineral formation. The intrusion strongly altered vitrinite, producing abundant pyrolytic carbon and vitrinite-derived coarse and fine cokes, whereas most inertinite retained its original characteristics. Semifusinite shows porous textures, and coking of the vitrinite–semifusinite transition is also observed.

139. 题目: Seasonal plant-microbial coupling regulates carbon transformation pathways and soil organic carbon persistence in alpine grasslands
文章编号: N26090118
期刊: Catena
作者: Na Li, Yalin Wang, Shanshan Li, Tianwei Xu, Lin Wei, Shixiao Xu, Na Zhao
更新时间: 2026-09-01
摘要: To elucidate the seasonal mechanisms underlying soil carbon cycling in alpine grasslands, we collected soil profile samples (0–50 cm) from the Qinghai-Tibet Plateau (QTP) in May, August, and November. Amino sugars and lignin phenols were used as molecular markers of microbial-derived and plant-derived carbon, respectively, and their ratio was used as a biomarker-based indicator of carbon transformation state. By integrating biomarker analysis with path modelling, we investigated the spatiotemporal patterns, controlling factors, and accumulation pathways of soil organic carbon (SOC). Our results showed that SOC remained relatively stable across seasons, whereas amino sugars, lignin phenols, and the amino sugar-to-lignin phenol ratio exhibited pronounced seasonal variation. SOC and biomarkers were generally concentrated in the topsoil (0–10 cm) and declined with depth, although amino sugars showed no significant depth-related variation in May. The ratio was highest in August (9.13 ± 0.42), compared with May (2.42 ± 0.36) and November (3.45 ± 0.13), and tended to be higher in deeper soil layers across seasons. Soil carbon transformation state was jointly associated with biotic and abiotic factors. Variance partitioning indicated that the independently explained variation in the May model was mainly associated with the unique abiotic fraction, whereas in the August and November models it was mainly associated with the unique biotic fraction. SOC accumulation followed three seasonal pathways: in May, it was primarily associated with physicochemical preservation of plant-derived carbon (path coefficient = 0.93) under constrained microbial activity; in August, enhanced carbon transformation promoted comparable plant- and microbial-derived contributions to SOC (0.45 and 0.51); and in November, SOC was more strongly linked to microbial residues (path coefficient = 0.69), suggesting a greater role of previously accumulated microbial-derived carbon. These findings provide a process-based framework for improving predictions of alpine grassland carbon sink dynamics under environmental change.

140. 题目: Level terraces enhance the vertical distribution of soil organic carbon in mixed forests: microbial mechanisms and carbon fraction dynamics on the loess plateau
文章编号: N26090117
期刊: Catena
作者: Zhe Li, Ning Zhang, Zi-ming Wang, Rui-kun Feng, Yi-qiao Chen, Zheng-hua Liu, Wen-fan Wang, Jia-bin Liu, Jian Wang
更新时间: 2026-09-01
摘要: Widespread construction of level terraces is a key strategy for soil erosion control and carbon sequestration on the Loess Plateau of China. However, the mechanism by which level terraces influence the vertical soil organic carbon (SOC) distribution remains unclear. Here, we investigated SOC and its microregulatory mechanisms across a 0–100 cm vertical soil profile by comparing level terraces with natural slopes (controls) and integrating SOC fractions, nutrient availability, and microbial characteristics. SOC (21.56%–84.21%) and its fractions were higher for level terraces than for natural slopes. However, the ratio of mineral-associated organic carbon (MAOC) to SOC was lower in level terraces, indicating more active carbon accumulation. A random forest model identified microbial properties as the primary driver of SOC variation. Level terraces modified microbial resource acquisition strategies by improving soil physical and nutrient conditions. With increasing soil depth, level terraces exhibited a transition from microbial carbon‑nitrogen limitation to nitrogen‑phosphorus limitation, characterized by alleviated carbon limitation and intensified phosphorus limitation. Microbial carbon use efficiency increased with depth, and its weak correlation with available phosphorus may stem from microbial phosphorus solubilization. Site preparation measures and soil depth directly or indirectly affected SOC by regulating the coupling of soil nutrients, extracellular enzyme activity, and microbial stoichiometry. Overall, microbial-driven mechanisms regulating SOC are central to the carbon sequestration potential of level terraces. Our findings provide important insights for evaluating the SOC pool regulation potential of level terraces and optimizing land management strategies in arid and semi-arid regions.