Journal of Environmental Sciences-china最新文献_第2页

Binding of Sb(V) to organic-mineral complexes: Implications for Sb mobility and fate in soils Sb(V)与有机矿物配合物的结合：对Sb在土壤中的迁移和命运的影响

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-07-29 DOI: 10.1016/j.jes.2025.07.057

Wanyu Li , Jianwei Zhou , Peng Liu , Xingjie Wang , Weiqing Zhou , Xiaocen Jia , Ying Li , Y. Zou Finfrock , Chunguang Wang

The mobility and fate of antimony (Sb) in soil and aquatic environments are primarily gocerned its adsorption onto iron oxides (hydroxides), a process markedly influenced by natural organic matter (NOM). In this study, batch experiments (kinetic studies, isotherm analyses, and pH effect evaluations) were conducted to examine Sb(V) adsorption onto Hematite-Humic complexes (Hem-HA complexes) as representative organic-inorganic hybrid materials. HA treatment did not modify the crystal structure of Hem. However, the resulting Hem-HA complexes exhibited reduced surface area, porosity, and pore diameter compared to unmodified Hem. The adsorption of Sb(V) was significantly affected by HA concentration and pH. The maximum adsorption capacity of Hem-HA complexes was lower than that of Hem and gradually decreased as the HA treatment concentration increased. The incorporation of HA onto Hem surfaces reduced the number of reactive adsorption sites, increasing the mobility risk of Sb(V). Sb(V) adsorption was favored under acidic conditions, with Hem-HA₄ showing a decrease in maximum adsorption capacity from 4.24 to 2.05 mg/g as pH rose from 3 to 9. The adsorption process followed pseudo-second-order kinetics and was well described by both the Langmuir and Freundlich models, indicating a monolayer adsorption mechanism. Spectroscopic analyses (Fourier transform infrared and X-ray absorption spectroscopy) confirmed the formation of Fe-O-Sb monodentate, mononuclear edge-sharing inner-sphere complexes via electron sharing or transfer. Direct complexation between organic functional groups and Sb(V) was also observed. These findings enhance our understanding of Sb biogeochemical cycling and offer valuable insights for Sb remediation in complex environmental systems.

锑（Sb）在土壤和水生环境中的迁移和命运主要取决于其在氧化铁（氢氧化物）上的吸附，这一过程受到天然有机质（NOM）的显著影响。本研究通过批量实验（动力学研究、等温线分析和pH效应评价）考察了Sb(V)在赤铁矿-腐殖质配合物（Hem-HA配合物）上的吸附。透明质酸处理没有改变Hem的晶体结构。然而，与未经修饰的Hem相比，Hem- ha复合物的表面积、孔隙率和孔径都有所减少。对Sb(V)的吸附受HA浓度和ph的显著影响，Hem-HA配合物的最大吸附量低于Hem，并随着HA处理浓度的增加而逐渐降低。HA在Hem表面的掺入减少了反应性吸附位点的数量，增加了Sb(V)的迁移风险。在酸性条件下有利于吸附Sb(V)，当pH值从3增加到9时，Hem-HA4的最大吸附量从4.24 mg/g下降到2.05 mg/g。吸附过程遵循准二级动力学，Langmuir和Freundlich模型均能很好地描述吸附过程，表明吸附机理为单层吸附。光谱分析（傅里叶变换红外和x射线吸收光谱）证实了Fe-O-Sb单齿、单核边共享球内配合物是通过电子共享或转移形成的。还观察到有机官能团与Sb(V)之间的直接络合作用。这些发现增强了我们对锑生物地球化学循环的认识，并为复杂环境系统中锑的修复提供了有价值的见解。

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引用次数: 0

Impacts of non-steroidal anti-inflammatory drugs on Phragmites australis root exudation throughout plant life cycle: Defense responses and phytoremediation potential 非甾体抗炎药对芦苇根系分泌物的影响：防御反应和植物修复潜力

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-06-05 DOI: 10.1016/j.jes.2025.05.076

Yifei Li , Yu’e Zhang , Xiaolin Liao , Hua Zou , Soon Keat Tan

Non-steroidal anti-inflammatory drugs (NSAIDs) are emerging contaminants of high-priority risks in surface waters, imposing pseudo-persistent stress on aquatic plants. Understanding these plants’ root exudation responses and regulatory mechanisms is crucial for preserving their ecological functions and advancing phytoremediation strategies. This study investigated the root exudate profiles of Phragmites australis across its life cycle under exposure to an environmental-level mixture of NSAIDs (diclofenac, ibuprofen, indomethacin, ketoprofen, and naproxen; 100 ng/L each). NSAID accumulation, oxidative stress, and antioxidant activity in plants were also analyzed to elucidate defense-related exudation mechanisms. The results revealed that NSAID stress significantly suppressed amino acid secretion in root exudates, particularly during the seedling to heading stages (30 % to 90 % of control levels), while markedly stimulating organic acid release, with pronounced increases (1.2- to 2.6-fold relative to controls) at the bolting, heading, and mature stages. NSAID accumulation in roots, stems, and leaves rose with plant development (up to 148, 65, and 34 ng/g dw, respectively), impairing photosynthesis and intensifying oxidative stress, which triggered stronger antioxidant defenses. The decline in root-exudated amino acids, such as glutamate, glutamine, proline, γ-aminobutyric acid, serine, threonine, valine, glycine, and isoleucine, suggests their increased utilization within plants to counteract NSAIDs-induced oxidative stress. Conversely, the enhanced secretion of organic acids, including quinate, tartrate, citrate, propanoate, malonate, malate, and oxalate, likely reduces root uptake of NSAIDs by increasing root-pollutant repulsion mediated by these compounds and recruiting bacteria capable of NSAID degradation via quinate co-metabolism.

非甾体抗炎药（NSAIDs）是地表水中新兴的高优先级风险污染物，对水生植物造成伪持续性胁迫。了解这些植物的根系分泌物响应及其调控机制对保护其生态功能和制定植物修复策略至关重要。本研究调查了芦苇（Phragmites australis）暴露于非甾体抗炎药（双氯芬酸、布洛芬、吲哚美辛、酮洛芬和萘普生，各100 ng/L）混合环境下整个生命周期的根分泌物分布。研究人员还分析了植物体内非甾体抗炎药的积累、氧化应激和抗氧化活性，以阐明与防御相关的分泌机制。结果表明，NSAID胁迫显著抑制了根分泌物中氨基酸的分泌，特别是在苗期至抽穗期（为对照水平的30% ~ 90%），同时显著刺激有机酸的释放，在抽苔期、抽穗期和成熟期显著增加（相对于对照增加1.2 ~ 2.6倍）。NSAID在根、茎和叶中的积累量随着植物发育而增加（分别达到148、65和34 ng/g dw），损害光合作用并加剧氧化应激，从而引发更强的抗氧化防御。根部分泌的氨基酸，如谷氨酸、谷氨酰胺、脯氨酸、γ-氨基丁酸、丝氨酸、苏氨酸、缬氨酸、甘氨酸和异亮氨酸的减少，表明它们在植物体内的利用增加，以对抗非甾体抗炎药引起的氧化应激。相反，有机酸的分泌增强，包括喹酸盐、酒石酸盐、柠檬酸盐、丙酸盐、丙酸盐、苹果酸盐和草酸盐，可能通过增加由这些化合物介导的根污染物排斥和招募能够通过喹酸盐共代谢降解非甾体抗炎药的细菌来减少根对非甾体抗炎药的吸收。

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引用次数: 0

Distribution characteristics, source apportionment and risk assessment of heavy metal pollution in typical redevelopment sites in Jinshan District, Shanghai, China 上海市金山区典型再开发用地重金属污染分布特征、来源解析及风险评价

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-12-25 DOI: 10.1016/j.jes.2025.12.062

Cheng Shen , Chenyan Sha , Tianhao He , Zhongchun Yan , Xiurong Chen , Kuangfei Lin , Haichao Chen , Jian Wu , Ye Li , Min Liu

As urban renewal accelerates, heavy metals (HMs) pollution resulting from industrial activities in urban areas must be considered. This study examines 36 representative redevelopment industrial sites in the Jinshan District of Shanghai, where the concentrations of eight HMs in the soil were assessed. Based on this data, the characteristics of heavy metal concentrations and their sources in the region were investigated, followed by a risk assessment of HMs pollution. The results indicate that the soil in the study area exhibits low levels of pollution, with moderate ecological risks. Using Pearson correlation analysis and the Absolute Principal Component Score-Multiple Linear Regression (APCS-MLR) source apportionment model, the HMs were categorized into several sources: An industrial source dominated by Cu (74.84 %), a traffic source dominated by Zn (67.51 %), a natural source dominated by Cr and As (66.50 % and 64.98 %, respectively), and a mixed source. A probabilistic risk assessment was conducted using Monte Carlo simulation, which incorporates the probability distributions of various assessment parameters, thereby reducing uncertainty in the results. The findings show that the non-carcinogenic risk for all populations in the study area (children, adult females, and adult males) remains within acceptable limits. However, the carcinogenic risk proportional probabilities for these populations were found to be 48.13 %, 32.49 %, and 11.41 %, respectively, indicating a notable risk level. Uncertainty analysis results suggest that the heavy metals Cd and As exhibit high sensitivity in the model. This study provides theoretical support for the prevention and control of soil pollution during urban renewal.

随着城市更新的加速，必须考虑城市地区工业活动造成的重金属污染。本研究以上海市金山区36个具有代表性的再开发工业用地为研究对象，对土壤中8种HMs的浓度进行了测定。在此基础上，调查了该地区重金属浓度特征及其来源，并进行了HMs污染风险评估。结果表明：研究区土壤污染程度低，生态风险中等；利用Pearson相关分析和绝对主成分评分-多元线性回归（APCS-MLR）源分配模型，将污染源划分为以Cu为主的工业源（74.84%）、以Zn为主的交通源（67.51%）、以Cr和As为主的自然源（66.50%和64.98%）和混合源。采用蒙特卡罗模拟方法进行概率风险评估，该方法综合了各种评估参数的概率分布，降低了评估结果的不确定性。研究结果表明，研究区域内所有人群（儿童、成年女性和成年男性）的非致癌风险仍在可接受范围内。然而，这些人群的致癌风险比例概率分别为48.13%、32.49%和11.41%，表明存在显著的风险水平。不确定度分析结果表明，重金属Cd和As在模型中表现出较高的灵敏度。本研究为城市更新过程中土壤污染的防治提供理论支持。

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引用次数: 0

Liquid mulching film mitigates cationic heavy metals migration via enhancing soil organic matter and cation exchange capacity 液体地膜通过提高土壤有机质和阳离子交换能力来减缓阳离子重金属的迁移

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-09-01 DOI: 10.1016/j.jes.2025.09.001

Lijuan Cha , Zhiyun Zhang , Ruiyao Shi , Fangfang Li , Gang Chu , Lincai Peng , Jing Zhao , Jing Li , Minghao Cheng , Min Wu

Liquid biodegradable mulching film (LBMFs) technology, an innovative agricultural technology, shows dual potential in plastic pollution reduction and heavy metal contamination control. Although their agronomic benefits are recognized, the underlying mechanisms of LBMFs in regulating heavy metal biogeochemical cycles remain inadequately understood. This study demonstrates the effectiveness of lignin-based (JH) and chitosan-based (LB) LBMFs in modifying heavy metal speciation and minimizing their uptake by crops. The results indicated that JH and LB significantly enhanced soil organic matter (SOM) by 14.29 %-27.01 % and cation exchange capacity (CEC) by 20.65 %-247.17 %, compared to soil blank control, primarily due to the enrichment of colloids derived from lignin/chitosan and the stimulation of microbial activity. Both films reduced the bioavailability of Cd and Pb by promoting their transition from mobile acid soluble/reducible (F1/F2) fractions to stable oxidizable/residual (F3/F4) fractions. In contrast, Cu and Zn speciation remained stable due to strong mineral interactions. The LBMFs also inhibited the transfer of heavy metals to edible crops. Crop-specific translocation factor (TF) variations were observed, with JH reducing pak choi TF by 32.62 %-76.09 % but increasing radish TF by 33.47 %-437.55 %, linked to lignin’s root chelation and chitosan’s phloem transport dynamics. Additionally, Mantel analysis confirmed bioconcentration factor (BCF)/TF reductions correlated strongly with elevated SOM (r = 0.82/0.73) and CEC (r = 0.80/0.77), governed by organo-mineral complexation and competitive cation displacement. This work positions LBMFs as valuable tools for enhancing soil health and reducing dietary risks associated with heavy metals in contaminated agricultural lands.

液体生物可降解地膜技术是一项创新的农业技术，在减少塑料污染和控制重金属污染方面具有双重潜力。虽然它们的农艺学效益已得到认可，但LBMFs调节重金属生物地球化学循环的潜在机制仍未得到充分了解。本研究证明了木质素基（JH）和壳聚糖基（LB） LBMFs在改变重金属形态和减少作物对重金属的吸收方面的有效性。结果表明，与空白对照相比，JH和LB显著提高了土壤有机质（SOM） 14.29% ~ 27.01%，阳离子交换容量（CEC） 20.65% ~ 247.17%，这主要是由于木质素/壳聚糖衍生物胶体的富集和微生物活性的刺激。两种膜通过促进Cd和Pb从可移动的酸溶/可还原（F1/F2）组分向稳定的可氧化/残留（F3/F4）组分转变，降低了Cd和Pb的生物利用度。相比之下，Cu和Zn的形态由于强烈的矿物相互作用而保持稳定。LBMFs还抑制了重金属向食用作物的转移。作物特异性转运因子（TF）的变化与木质素的根螯合作用和壳聚糖的韧皮部运输动力学有关，JH使白菜的TF降低了32.62% ~ 76.09%，而使萝卜的TF增加了33.47% ~ 437.55%。此外，Mantel分析证实，生物浓度因子(BCF)/TF降低与SOM升高（r = 0.82/0.73）和CEC升高（r = 0.80/0.77）密切相关，受有机-矿物络合作用和竞争性阳离子位移控制。这项工作将LBMFs定位为加强土壤健康和减少受污染农田中与重金属相关的饮食风险的宝贵工具。

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引用次数: 0

Sustainable antibiotic degradation in a pH-adaptable heterogeneous electro-Fenton system: Insights into cross-scale mechanism validation 可持续抗生素降解在ph适应性异质电fenton系统：洞察跨尺度机制验证

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-05-23 DOI: 10.1016/j.jes.2025.05.041

Meiyi Tang, Tao Hou, Hongli Lu, Yutong Xue, Meiqi Ren, Dan Cui

Fenton-based advanced oxidation processes had shown significant potential for antibiotics remediation, yet their application remained constrained by challenges including the dependence on continuous H₂O₂ supplementation, limited catalyst reusability, and insufficient mechanistic understanding of antibiotic degradation. This study developed a pH-universal heterogeneous electro-Fenton system using an in-situ synthesized Fe@Fe₂O₃/active carbon fiber (ACF) composite cathode for sulfadiazine (SDZ) removal from wastewater. Under optimal conditions (pH of 2–3, current density of 20 mA/cm², aeration rate of 0.6 L/min, and electrolyte concentration of 0.05 mol/L Na₂SO₄), the removal efficiency of SDZ achieved 90.0 % ± 0.6 % and the corresponding removal rate was as high as 22.4 ± 0.1 g/(m³·h). Notably, the Fe@Fe₂O₃/ACF composite cathode demonstrated exceptional stability with minimal iron leaching of 18.2 ± 0.6 μg/L in each cycle. Cross-scale mechanism validation, which integrated radical scavenging experiments, electron spin resonance spectroscopy, density functional theory, and intermediates analysis, revealed that hydroxyl radicals (·OH) was the exclusive reactive species driving SDZ degradation and that the preferential substitution of the free amino group and cleavage of the pyrimidine ring were critical steps in intermediate formation. This work advanced the mechanistic understanding of Fenton-based antibiotic degradation while providing a sustainable strategy for stable catalytic system design.

基于fenton的高级氧化工艺在抗生素修复方面显示出巨大的潜力，但其应用仍然受到一些挑战的限制，包括对持续补充H2O2的依赖，催化剂的可重复使用性有限，以及对抗生素降解机制的了解不足。本研究利用原位合成Fe@Fe2O3/活性炭纤维（ACF）复合阴极，开发了ph通用的非均相电fenton系统，用于废水中磺胺嘧啶（SDZ）的去除。在pH = 2 ~ 3、电流密度为20 mA/cm2、曝气率为0.6 L/min、电解液浓度为0.05 mol/L Na2SO4的最佳条件下，SDZ的去除率可达90.0%±0.6%，去除率高达22.4±0.1 g/（m3·h）。值得注意的是，Fe@Fe2O3/ACF复合阴极表现出优异的稳定性，每次循环的铁浸出量最小，为18.2±0.6 μg/L。跨尺度机理验证综合了自由基清除实验、电子自旋共振光谱、密度泛谱理论和中间体分析，结果表明羟基自由基（·OH）是驱动SDZ降解的唯一反应物质，游离氨基的优先取代和嘧啶环的裂解是中间体形成的关键步骤。这项工作促进了对fenton基抗生素降解机理的理解，同时为稳定的催化系统设计提供了可持续的策略。

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引用次数: 0

NOx-driven chemical transformation of terpene mixtures: Linking highly oxygenated organic molecules to health effects in secondary organic aerosol 氮氧化物驱动萜烯混合物的化学转化：二级有机气溶胶中高氧有机分子与健康效应的联系

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-09-09 DOI: 10.1016/j.jes.2025.09.004

Xiaowen Chen , Kun Li , Ruiyu Li , Li Fang , Haizhen Bian , Wei Jiang , Caiqing Yan , Lin Du

Biogenic volatile organic compounds (BVOCs), particularly terpenes, represent the dominant global source of secondary organic aerosols (SOA). However, the crucial investigation in terpene mixture under various nitrogen oxides (NO_x) conditions needs to be further explored. To comprehensively understand the mixed SOA composition and its associated health effects, we simulated the mixed oxidation of α-pinene and isoprene in a smog chamber under various NO_x conditions to investigate SOA formation and its related health effects. We found that increasing NO_x levels led to the formation of CHON compounds, suppressing functionalized products and oligomers. Results of the oxidative potential and total peroxides of SOA showed that mixed SOA had combined redox characteristics (isoprene SOA > mixed SOA > α-pinene SOA). The oxidative potential of isoprene SOA decreased as NO_x increased, while α-pinene SOA was slightly affected. Results from iodometry combined with mass spectrometry indicated that hydrogen peroxides (ROOH) in highly oxygenated molecules played a crucial role in SOA health effects. NO_x was found to influence the production of ROOH by interfering with the RO₂ + HO₂ and RO₂ isomerization pathways. These results indicate that the reactive intermediate components in BVOC mixture under various NO_x conditions are important factors influencing health effects of aerosol.

生物源性挥发性有机化合物（BVOCs），特别是萜烯，是全球二次有机气溶胶（SOA）的主要来源。然而，在各种氮氧化物（NOx）条件下萜烯混合物的关键研究需要进一步探索。为了全面了解混合SOA组成及其相关的健康影响，我们模拟了不同NOx条件下雾霾室内α-蒎烯和异戊二烯的混合氧化，以研究SOA的形成及其相关的健康影响。我们发现，增加氮氧化物水平导致CHON化合物的形成，抑制功能化产物和低聚物。SOA的氧化电位和总过氧化物结果表明，混合SOA具有复合氧化还原特性（异戊二烯SOA >；混合SOA >； α-蒎烯SOA）。随着NOx的增加，异戊二烯SOA的氧化电位降低，而α-蒎烯SOA的氧化电位受影响较小。碘量结合质谱分析结果表明，高氧分子中的过氧化氢（ROOH）在SOA健康效应中起着至关重要的作用。发现NOx通过干扰RO2 + HO2和RO2异构化途径影响ROOH的生成。上述结果表明，不同NOx条件下BVOC混合物中的活性中间组分是影响气溶胶健康效应的重要因素。

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引用次数: 0

Dual function of sulfur in Cd-As co-contaminated soils: Enhancing phytoremediation with mustard and ensuring rice safety under drought-flood rotation systems 硫在镉砷共污染土壤中的双重作用：加强芥菜植物修复和旱涝轮作下水稻安全保障

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-06-18 DOI: 10.1016/j.jes.2025.06.026

Fei Miao , Xin Zhang , Qingling Fu , Hongqing Hu , Md․ Shoffikul Islam , Zaibin Yuan , Xiang Wang , Lin Yang , Linchuan Fang , Jun Zhu

Sulfur regulates cadmium (Cd) and arsenic (As) bioavailability in flooded paddy field. However, its geochemical effects under alternating redox conditions in drought-flood rotation systems remain uncertain. This study investigated sulfur's dual effects in a mustard-rice rotation system and its impact on the migration and transformation of Cd and As crop production safety. The results showed that sulfur application during the upland season significantly boosted Cd and As bioavailability, enhancing the hyperaccumulator mustard's ability to extract heavy metals. Specifically, Cd and As contents increased by 31.8 %-35.5 % and 17.1 %-25.2 % in the aboveground, and by 43.0 %-44.1 % and 33.1 %-36.5 % in the underground, respectively. Additionally, mustard's antioxidant system was significantly improved, leading to a 12.6 %-14.8 % increase in biomass. In the subsequent paddy season, residual sulfur significantly reduced Cd and As bioavailability and mobility by promoting the formation of iron plaque on rice roots. Consequently, Cd and As contents in brown rice decreased by 48.4 % and 45.8 %, with Cd meeting the requirement of quality safety standards. Microcosm experiments confirmed a distinct interaction between sulfur application and water management: sulfur enhanced heavy metal mobilization under drought conditions, while drastically reducing their bioavailability under flooded conditions. To summarize, sulfur enhances heavy metal accumulation during the mustard season for “pollution remediation” and ensures “safe production” during the rice season by blocking the absorption of heavy metals. The proposed sulfur-mediated “remediation-production” mustard-rice rotation system offers a sustainable and efficient remediation strategy for Cd-As co-contaminated soils.

硫调节水稻田镉和砷的生物利用度。然而，其在旱涝轮作系统中交替氧化还原条件下的地球化学效应仍不确定。研究了硫在芥菜-水稻轮作系统中的双重效应及其对镉和砷作物安全生产的影响。结果表明，旱季施硫显著提高了镉和砷的生物利用度，增强了超积累型芥菜对重金属的提取能力。其中，地上Cd和As含量分别增加31.8% ~ 35.5%和17.1% ~ 25.2%，地下Cd和As含量分别增加43.0% ~ 44.1%和33.1% ~ 36.5%。此外，芥菜的抗氧化系统显著改善，导致生物量增加12.6% - 14.8%。在随后的水稻季节，残硫通过促进水稻根系铁膜的形成，显著降低镉和砷的生物利用度和流动性。结果表明，糙米中Cd和As含量分别下降48.4%和45.8%，Cd符合质量安全标准要求。微观实验证实了硫施用与水管理之间的明显相互作用：硫在干旱条件下增强重金属的动员，而在洪水条件下急剧降低其生物利用度。综上所述，硫促进了芥菜季节重金属的积累，以进行“污染修复”，并通过阻止重金属的吸收来保证水稻季节的“安全生产”。硫介导的芥菜-水稻“修复-生产”轮作系统为Cd-As共污染土壤提供了一种可持续、高效的修复策略。

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引用次数: 0

Crop-specific biogenic volatile organic compound emissions in China 中国作物特异性生物源性挥发性有机化合物排放

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-08-12 DOI: 10.1016/j.jes.2025.08.018

Ying Zhou , Jing Cao , Jianlei Lang , Huijuan Fan , Wanting Zhang , Xinyu Qu , Yadong Wang , Dongsheng Chen , Shuiyuan Cheng

Biogenic volatile organic compounds (BVOCs) emissions from agricultural crops significantly impact atmospheric chemistry and air quality, yet detailed crop emission remains rarely quantified, restricting understanding of agroecosystems environmental effects. This study investigates the differential BVOCs emissions of crops across China by integrating growth parameters (e.g., leaf area index, phenology) with improved emission factors. The total BVOCs emissions from crops in China (2023) is 1936.8 Gg, including maize (645.3 Gg), rice (777.0 Gg), wheat (119.5 Gg), cotton (58.9 Gg), soybeans (76.5 Gg), peanuts (58.0 Gg), rape (67.7 Gg), sesame (1.6 Gg), tubers (potatoes, sweet potatoes, cassava) (125.9 Gg), and hemp (6.5 Gg). Maize and rice have higher emission intensity (emissions per unit area) than wheat. This emission intensity for the same crop varies regionally. The growth periods with higher emissions is various for specific crop (e.g., maize and rice: growth periods; wheat: maturity period). The spatial distribution on both sides of the Heihe-Tengchong Line exhibited differentiation (the southeastern side: 43 % of the national land area, 92.8 % of the emissions). The spatial distribution of BVOCs emissions from various crops reflects their cultivation distribution characteristics. The monthly variation of emissions displayed a "single-peak" characteristic (64.1% in summer), and not all crops released BVOCs throughout the year. The timing of emissions varied both between crops and across regions for the same crop. Crop BVOCs emissions are predominantly oxygenated VOCs (82.5 %), with methanol as the main component. These results provide important basic data for assessing agricultural impact on ozone (O₃) and secondary organic aerosols (SOA).

农业作物的生物源性挥发性有机化合物（BVOCs）排放显著影响大气化学和空气质量，但详细的作物排放仍然很少量化，限制了对农业生态系统环境影响的理解。本研究通过将生长参数（如叶面积指数、物候）与改善排放因子相结合，研究了中国各地作物BVOCs的差异排放。2023年中国农作物BVOCs排放总量为1936.8 Gg，包括玉米（645.3 Gg）、水稻（777.0 Gg）、小麦（119.5 Gg）、棉花（58.9 Gg）、大豆（76.5 Gg）、花生（58.0 Gg）、油菜（67.7 Gg）、芝麻（1.6 Gg）、块茎（土豆、红薯、木薯）（125.9 Gg）和大麻（6.5 Gg）。玉米和水稻的排放强度（单位面积排放量）高于小麦。同一作物的排放强度因地区而异。排放量较高的生长期因具体作物而异（例如，玉米和水稻为生长期，小麦为成熟期）。黑河—腾冲线两侧空间分布呈现分异特征（东南侧占国土面积的43%，排放量占全国总量的92.8%）。不同作物BVOCs排放的空间分布反映了其种植分布特征。排放量的月变化呈“单峰”特征（夏季为64.1%），并不是所有作物全年都释放BVOCs。对于同一种作物，不同作物之间和不同地区的排放时间各不相同。农作物挥发性有机化合物排放以含氧挥发性有机化合物为主（占82.5%），甲醇为主要成分。这些结果为评价农业对臭氧（O3）和二次有机气溶胶（SOA）的影响提供了重要的基础数据。

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引用次数: 0

Beyond ammonia-oxidizing bacteria-centric paradigms: Geobacter-assisted anodic anaerobic ammonia oxidation 超越氨氧化细菌为中心的范例：地杆菌辅助的阳极厌氧氨氧化

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-07-18 DOI: 10.1016/j.jes.2025.07.035

Decong Zheng , Daping Li , Jingting Wang

Anodic anaerobic ammonium oxidation (anodic anammox) presents a sustainable approach for nitrogen removal, yet its bioelectrochemical mechanisms remain unclear due to biofilm complexity and undefined roles of electroactive microorganisms (EAMs). This study reveals that nitrite (NO₂⁻) is the direct product of ammonia-oxidizing bacteria (AOB)-driven anodic anammox, with extracellular electron transfer (EET) mediated by indirect mechanisms via redox shuttles. Metagenomic analysis identified two ammonia oxidation pathways: (1) a novel short-range nitrification pathway (NH₄⁺ → NO₂⁻) governed by ncd2 genes, and (2) a traditional ammonia oxidation pathway (NH₄⁺ → NH₂OH) facilitated by amoABC. Intriguingly, Geobacter exhibited potential NH₂OH oxidation capability, bridging AOB activity and electrode respiration. Functional inhibition experiments demonstrated that EAMs-derived electron shuttles and reactive oxygen species (ROS) are critical for enhancing EET efficiency, with ROS serving as a key electron acceptor for AOB under anaerobic conditions. Spatial and metabolic synergy between EAMs and AOB—via substrate cross-feeding, cofactor provision, and electron transfer—was essential for maintaining biofilm stability. These findings challenge the conventional view of AOB-driven anodic anaerobic anammox mechanisms and provide new insights into sustainable nitrogen removal in engineered bioelectrochemical systems.

阳极厌氧氨氧化（Anodic anammox）是一种可持续的脱氮方法，但由于生物膜的复杂性和电活性微生物（EAMs）的作用尚未明确，其生物电化学机制尚不清楚。该研究揭示了亚硝酸盐（NO₂⁻）是氨氧化菌（AOB）驱动的阳极厌氧氨氧化反应的直接产物，通过氧化还原梭介导细胞外电子转移（EET）的间接机制。宏基因组分析确定了两种氨氧化途径：(1)由ncd2基因调控的新型短程硝化途径（NH₄+→NO₂⁻）和(2)由amoABC促进的传统氨氧化途径（NH₄+→NH₂OH）。有趣的是，Geobacter表现出潜在的NH₂OH氧化能力，桥接AOB活性和电极呼吸。功能抑制实验表明，eams衍生的电子穿梭和活性氧（ROS）是提高EET效率的关键，其中ROS是厌氧条件下AOB的关键电子受体。eam和aob之间的空间和代谢协同作用——通过底物交叉喂养、辅因子提供和电子转移——对于维持生物膜的稳定性至关重要。这些发现挑战了aob驱动的阳极厌氧厌氧氨氧化机制的传统观点，并为工程生物电化学系统的可持续脱氮提供了新的见解。

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引用次数: 0

Synergistic waste-based substrates: Optimizing constructed wetland performance for rural wastewater remediation 协同废物基基质：优化人工湿地对农村污水修复的性能

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2026-05-01 Epub Date: 2025-06-17 DOI: 10.1016/j.jes.2025.06.027

Li Sun , Mengmeng Di , Shuaiwen Jia , Jinsong Liang , Panyue Zhang , Guangming Zhang

This study established four constructed wetlands (CWs) using different substrate combinations derived from local rural wastes. The aim was to investigate the influence of these waste-derived substrates on CW performance. Results showed that the CW-ZR system (zeolite: reed biochar = 2:2) exhibited the highest removal efficiencies for COD, NH₄⁺-N, and TN with average removal efficiencies of 64.39 %, 61.98 %, and 59.88 %, respectively, attributed to the abundant oxygen-containing functional groups and aromatic functional groups, porous structure, and good ion exchange capacity of reed biochar. Additionally, the CW-ZO system (zeolite: oyster shells = 2:2) exhibited the highest TP removal efficiency (49.02 %). This enhanced performance may be attributed to the alkaline oyster shells, which contain high concentrations of calcium carbonate and active calcium oxide. These components facilitate phosphate adsorption through anion exchange, effectively binding negatively charged phosphate ions to the shells. Further investigation revealed that the system with reed biochar had the best performance in promoting plant growth among the three substrate materials, which can be attributed to the synergistic effects of the substrate characteristics, high nutrient removal efficiencies, and the enriched microbial communities within the combined systems. Consequently, the addition of reed biochar elevated the relative abundances of bacterial groups associated with nitrogen and organic matter degradation, while oyster shells promoted the proliferation of phosphorus-degrading microbial communities. These studies confirm that optimizing substrates with rural waste can strengthen the comprehensive treatment performance of CWs.

本研究建立了四个人工湿地（CWs），使用来自当地农村废物的不同基质组合。目的是研究这些废物来源的底物对连续波性能的影响。结果表明：沸石：芦苇炭= 2:2的CW-ZR体系对COD、NH4+-N和TN的平均去除率分别为64.39%、61.98%和59.88%，这主要是由于芦苇炭具有丰富的含氧官能团和芳香族官能团、多孔结构和良好的离子交换能力。沸石：牡蛎壳= 2:2的CW-ZO体系对TP的去除率最高（49.02%）。这种增强的性能可能归因于碱性牡蛎壳，其中含有高浓度的碳酸钙和活性氧化钙。这些成分通过阴离子交换促进磷酸盐吸附，有效地将带负电荷的磷酸盐离子结合到壳上。进一步研究发现，在3种基质材料中，添加芦苇生物炭的体系对植物生长的促进效果最好，这可能是由于基质特性的协同作用、较高的营养物去除效率以及复合体系内丰富的微生物群落。因此，添加芦苇生物炭提高了与氮和有机物降解相关的细菌群的相对丰度，而牡蛎壳则促进了磷降解微生物群落的增殖。这些研究证实，利用农村垃圾优化基质可以增强水化水的综合处理性能。

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引用次数: 0