Environmental Technology & Innovation最新文献_第7页

Adsorption of sodium dodecyl benzene sulfonate surfactant from aqueous solutions using magnetic graphene oxide nanocomposite functionalized with chitosan 壳聚糖功能化磁性氧化石墨烯纳米复合材料对十二烷基苯磺酸钠表面活性剂的吸附研究

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2026-03-01 Epub Date: 2026-01-26 DOI: 10.1016/j.eti.2026.104776

Azin Peyravian , Mozhgan Emtyazjoo , Mahnaz sadat Sadeghi , Raziyeh Najafloo

This study investigated the removal of sodium dodecyl benzene sulfonate (SDBS) from aqueous solutions using a chitosan-functionalized magnetic graphene oxide nanocomposite. Graphene was initially synthesized from lignocellulose waste, followed by oxidation and magnetization. The material was subsequently functionalized with chitosan extracted from shrimp shells. The structural properties of the synthesized nanoparticles were characterized using FE-SEM, VSM, AFM, and Raman spectroscopy, which confirmed successful synthesis and functionalization. Batch adsorption experiments were conducted to evaluate the effects of pH, adsorbent dosage, contact time, and temperature. The results showed a maximum experimental adsorption capacity of approximately 65 mg/g. The adsorption isotherm was best described by the Langmuir model, indicating monolayer adsorption on a homogeneous surface. Kinetic studies revealed that the adsorption process followed the pseudo-second-order model. Thermodynamic analysis confirmed that the adsorption of SDBS was endothermic and spontaneous. The synthesized nanocomposite demonstrated a relatively high adsorption capacity for SDBS, suggesting its potential for economic recovery and reuse in wastewater treatment systems. The adsorption mechanism was found to be governed by a combination of electrostatic interactions and surface complexation, indicating a mixed physical–chemical adsorption process.

本研究研究了壳聚糖功能化磁性氧化石墨烯纳米复合材料对水溶液中十二烷基苯磺酸钠（SDBS）的去除效果。石墨烯最初是由木质纤维素废料合成的，然后进行氧化和磁化。随后用虾壳提取的壳聚糖对该材料进行功能化处理。利用FE-SEM、VSM、AFM和拉曼光谱对合成的纳米颗粒进行了结构表征，证实了纳米颗粒的成功合成和功能化。通过批量吸附实验，考察了pH、吸附剂用量、接触时间和温度对吸附效果的影响。实验结果表明，其最大吸附量约为65 mg/g。Langmuir模型最能描述吸附等温线，表明在均匀表面上的单层吸附。动力学研究表明，吸附过程符合准二阶模型。热力学分析证实了SDBS的吸附是吸热自发的。合成的纳米复合材料对SDBS具有较高的吸附能力，表明其在废水处理系统中具有经济回收和再利用的潜力。吸附机理是静电相互作用和表面络合作用共同作用的结果，是一个物理-化学混合吸附过程。

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引用次数: 0

Coffee pulp and husk-derived hydrochars and biochars adsorb polyphenols and pesticides from wastewater 咖啡浆和壳衍生的水炭和生物炭吸附废水中的多酚和农药

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2026-03-01 Epub Date: 2026-01-09 DOI: 10.1016/j.eti.2025.104739

Brigitte Mukarunyana , Cecilia Sundberg , Christoffer Boman , Telesphore Kabera , Jerker Fick

Coffee processing generates significant amounts of wastewater rich in organic compounds and sometimes also pesticides. This poses environmental challenges for producing regions. This study aimed to assist coffee producers by providing local waste management solutions by examining the adsorption efficiency of hydrochars and biochars derived from coffee pulps (CP) and coffee husks (CH) in removing polyphenols and pesticides from coffee processing wastewater (CPWW). These materials were tested for the adsorption of selected polyphenols and pesticides from CPWW. Hydrochars exhibited high removal efficiencies for polyphenols (up to 100 %), primarily via hydrogen bonding, while biochars effectively adsorbed hydrophobic pesticides (removal efficiencies up to ∼75 %) through hydrophobic interactions. Adsorption data fitted the Freundlich isotherm, indicating multilayer adsorption, and kinetic analyses suggested complex mechanisms involving both physisorption and chemisorption. These findings demonstrate the potential of coffee waste-derived chars to serve as sustainable adsorbents for mitigating pollution from CPWW, offering a promising local waste management strategy in coffee-producing countries

咖啡加工过程中会产生大量富含有机化合物的废水，有时还会产生杀虫剂。这给生产地区带来了环境挑战。本研究旨在通过考察从咖啡浆（CP）和咖啡壳（CH）中提取的水炭和生物炭对咖啡加工废水（CPWW）中多酚和农药的吸附效率，为咖啡生产商提供当地废物管理解决方案。测试了这些材料对CPWW中所选多酚和农药的吸附性能。水炭对多酚的去除效率很高（高达100 %），主要通过氢键，而生物炭通过疏水相互作用有效吸附疏水农药（去除效率高达75 %）。吸附数据符合Freundlich等温线，表明多层吸附，动力学分析表明复杂的吸附机制包括物理吸附和化学吸附。这些研究结果表明，咖啡废物产生的木炭有潜力作为可持续吸附剂，减轻CPWW的污染，为咖啡生产国提供了一种有前途的当地废物管理策略

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引用次数: 0

Effects of micro/nanoplastics on physicochemical properties and cadmium(II)-sorption capacity of pig-bone biochar 微/纳米塑料对猪骨生物炭理化性质及镉吸附能力的影响

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2026-03-01 Epub Date: 2026-01-15 DOI: 10.1016/j.eti.2026.104753

Yuanxiang Yang , Ying Du , Mingbiao Xiong , Shaoping Yang , Yinlong Xiao

Biochar, when introduced into the environment, has a high potential to coexist with micro/nanoplastics (MPs/NPs), yet the effects of these plastics on biochar’s properties and metal removal capacity remain unclear. This study investigated how pig-bone biochar of sizes 25–75 μm (B75) and 250–425 μm (B425) interacts with polystyrene particles of 25, 200, and 5000 nm (PS25, PS200, and PS5000, respectively). Results indicated that the surface area of B75 was significantly reduced after interacting with MPs/NPs, while the surface area of B425 tended to increase. Furthermore, the Cd(II)-sorption performance of B75 was mostly unaffected by MPs/NPs. In contrast, the Cd(II)-sorption capacity of B425 increased significantly by 18.6 %, 24.2 %, and 7.0 % following interactions with PS25, PS200, and PS5000, respectively. Kinetic and isothermal analyses revealed that, irrespective of interaction with MPs/NPs, the active sites on B75 for Cd(II)-sorption remained heterogeneous and the Cd(II)-sorption process was primarily driven by chemical forces. Conversely, after interacting with MPs/NPs, physical adsorption played a major role in the Cd(II)-sorption on B425. Using 2D-FTIR-COS analysis, we determined that COO⁻ groups on the pig-bone biochar were the most sensitive for Cd(II)-sorption. However, following interaction with MPs/NPs, the contribution of COO^- groups to the Cd(II)-sorption diminished. Additionally, after interacting with MPs/NPs, the polystyrene benzene ring skeleton and C-H bending outside the benzene ring contributed to the Cd(II)-sorption process. This study emphasizes that the effects of MPs/NPs should be considered when using biochar to remediate metal pollution in the environment.

生物炭在引入环境后，具有与微/纳米塑料（MPs/NPs）共存的巨大潜力，但这些塑料对生物炭性能和金属去除能力的影响尚不清楚。本研究研究了尺寸为25 - 75 μm （B75）和250-425 μm （B425）的猪骨生物炭与25、200和5000 nm的聚苯乙烯颗粒（PS25、PS200和PS5000）的相互作用。结果表明，与MPs/NPs相互作用后，B75的比表面积显著减小，而B425的比表面积有增大的趋势。此外，B75的Cd（II）吸附性能基本不受MPs/NPs的影响。相比之下，B425对Cd（II）的吸附量在与PS25、PS200和PS5000相互作用后分别显著增加了18.6 %、24.2 %和7.0 %。动力学和等温分析表明，无论与MPs/NPs的相互作用如何，B75吸附Cd（II）的活性位点都是不均匀的，Cd（II）的吸附过程主要由化学力驱动。相反，在与MPs/NPs相互作用后，物理吸附在B425对Cd（II）的吸附中起主要作用。通过2D-FTIR-COS分析，我们确定猪骨生物炭上的COO毒枭对Cd（II）的吸附最敏感。然而，在与MPs/NPs相互作用后，COO-基团对Cd（II）吸附的贡献减弱。此外，与MPs/NPs相互作用后，聚苯乙烯苯环骨架和苯环外的C-H弯曲有助于Cd（II）的吸附过程。本研究强调利用生物炭修复环境中的金属污染应考虑MPs/NPs的影响。

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引用次数: 0

Enhancing tetracycline degradation prediction with hybrid DBO-XGBoost on g-C₃N₄ photocatalysts DBO-XGBoost在g-C₃N₄光催化剂上增强四环素降解预测

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2026-03-01 Epub Date: 2025-12-25 DOI: 10.1016/j.eti.2025.104711

Liuyan Wang , Yinggang Wang , Yun Wang

Antibiotic contamination from tetracyclines (TC) poses significant ecological and public health risks, necessitating effective remediation strategies. Current methods for predicting photocatalytic degradation efficiency often overlook complex, nonlinear interactions in dynamic environmental systems. To address this, we developed a Decision-Based Optimization-enhanced XGBoost (DBO-XGBoost) model tailored to predict and optimize TC degradation using graphitic carbon nitride (g-C₃N₄) photocatalysts. By integrating DBO for targeted hyperparameter tuning within the XGBoost framework, the model effectively captures nonlinear dependencies, achieving superior predictive accuracy (R² = 0.95, RMSE = 0.11). Utilizing a robust dataset of 157 experimental data points, we evaluated eight machine learning models, including traditional (SVR, ANN), advanced (CatBoost, LightGBM), and hybrid (GWO-XGBoost) algorithms. DBO-XGBoost outperformed all models in both performance and robustness. Correlation analysis identified specific surface area and light wavelength as critical factors influencing photocatalytic efficiency, aligning with kinetic principles and providing actionable insights for material and process optimization. Additionally, a theoretical analysis assessed the economic and environmental benefits of g-C₃N₄ photocatalysis, demonstrating its cost-effectiveness and reduced environmental impact compared to traditional methods. This study establishes DBO-XGBoost as a powerful predictive and optimization tool and presents a novel framework for advancing photocatalytic systems to effectively mitigate antibiotic pollution in aquatic environments.

Synopsis

This study developed a machine learning-optimized photocatalytic system for TC degradation, advancing sustainable solutions in environmental remediation.

四环素类抗生素污染造成严重的生态和公共卫生风险，需要有效的修复策略。目前预测光催化降解效率的方法往往忽略了动态环境系统中复杂的非线性相互作用。为了解决这个问题，我们开发了一个基于决策的优化增强XGBoost （DBO-XGBoost）模型，该模型专门用于预测和优化石墨碳氮化碳（g-C₃N₄）光催化剂对TC的降解。通过在XGBoost框架中集成DBO进行目标超参数调优，该模型有效地捕获了非线性依赖关系，实现了卓越的预测精度（R²= 0.95,RMSE = 0.11）。利用157个实验数据点的强大数据集，我们评估了8种机器学习模型，包括传统（SVR， ANN），先进（CatBoost, LightGBM）和混合（GWO-XGBoost）算法。DBO-XGBoost在性能和鲁棒性方面都优于所有模型。相关性分析发现，比表面积和光波长是影响光催化效率的关键因素，与动力学原理一致，为材料和工艺优化提供了可行的见解。此外，理论分析评估了g-C₃N₄光催化的经济和环境效益，证明了与传统方法相比，它具有成本效益和减少了对环境的影响。本研究建立了DBO-XGBoost作为一个强大的预测和优化工具，并为推进光催化系统有效减轻水生环境中的抗生素污染提供了一个新的框架。本研究开发了一种机器学习优化的TC降解光催化系统，为环境修复提供了可持续的解决方案。

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引用次数: 0

Electrospun g-C3N4/Ti3C2Tx/Cu2O Z-scheme heterojunction nanofibers for efficient visible-light photocatalytic degradation of dyes and PPCPs with robust reusability 电纺丝g-C3N4/Ti3C2Tx/Cu2O Z-scheme异质结纳米纤维用于染料和ppcp的可见光催化降解，具有强大的可重复使用性

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2026-03-01 Epub Date: 2025-11-24 DOI: 10.1016/j.eti.2025.104633

Zilin Chen , Dan Liao , Madiha Rafiq, Changkun Liu

A novel reusable Z-scheme g-C₃N₄/Ti₃C₂T_X/Cu₂O nanofiber membrane (CTC-NFs) was innovatively fabricated via electrospinning, effectively overcoming recyclability and stability issues common to traditional photocatalysts in wastewater treatment. Incorporation of Ti₃C₂T_X and Cu₂O into g-C₃N₄ expanded visible-light absorption and significantly improved electron-hole separation efficiency. Under visible illumination, CTC-NFs exhibited remarkable degradation efficiencies for methyl orange (95.2 %), methylene blue (98.4 %), and rhodamine B (95.9 %), substantially outperforming pure g-C₃N₄ (46.2 %), g-C₃N₄/Ti₃C₂T_X (76.0 %), g-C₃N₄/Cu₂O (78.7 %), and Cu₂O alone (84.2 %). It also effectively degraded pharmaceutical pollutants, including ibuprofen (89.0 %), doxycycline hydrochloride (83.7 %), tributyl phosphate (97.8 %), and levofloxacin (91.3 %). Notably, performance remained consistently high (95.6–93.9 %) after five reuse cycles, confirming superior stability and practical reusability. Enhanced activity was attributed to Ti₃C₂T_X exceptional conductivity, facilitating rapid electron transport and reducing electron-hole recombination, while ESR confirmed robust reactive oxygen species generation. This ternary Z-scheme nanofiber membrane thus represents a scalable, high-performance platform for visible-light-driven environmental remediation.

采用静电纺丝技术制备了一种新型可重复使用的Z-scheme g-C3N4/Ti3C2TX/Cu2O纳米纤维膜（CTC-NFs），有效克服了传统光催化剂在废水处理中存在的可回收性和稳定性问题。在g-C3N4中掺入Ti3C2TX和Cu2O，扩大了g-C3N4的可见光吸收，显著提高了电子空穴分离效率。在可见光下，CTC-NFs对甲基橙（95.2% %）、亚甲基蓝（98.4% %）和罗丹明B（95.9% %）的降解效率显著，显著优于纯g-C3N4（46.2% %）、g-C3N4/Ti3C2TX（76.0 %）、g-C3N4/Cu2O（78.7% %）和单独Cu2O（84.2 %）。对布洛芬（89.0 %）、盐酸强力霉素（83.7 %）、磷酸三丁酯（97.8% %）、左氧氟沙星（91.3 %）等药物污染物也有较好的降解效果。值得注意的是，在五个重用周期后，性能始终保持在较高水平（95.6-93.9 %），证实了卓越的稳定性和实际的可重用性。增强的活性归因于Ti3C2TX优异的导电性，促进快速电子传递和减少电子空穴复合，而ESR证实了活性氧的强劲生成。因此，这种三元z型纳米纤维膜代表了一种可扩展的高性能平台，用于可见光驱动的环境修复。

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引用次数: 0

Nutrient dynamics and recovery efficiencies in a decentralised faecal sludge and food waste treatment system 分散的粪便污泥和食物垃圾处理系统的营养动态和回收效率

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2026-03-01 Epub Date: 2025-12-31 DOI: 10.1016/j.eti.2025.104740

Eric Gbenatey Nartey , Ruben Sakrabani , Sean Tyrrel , Edna Dapaah , Noah Adamtey

Decentralised faecal sludge (FS) and food waste (FW) treatment systems like co-composting system offer more practical solutions for waste treatment and nutrient recovery in low- and middle-income countries, yet nutrient recovery and losses across this system remain poorly quantified.This study aimed to assess the flows, losses, and recovery efficiencies of nitrogen (N), phosphorus (P) & potassium (K) with the goal of recommending measures to minimize pollution to water bodies. Raw FS, FW, compost, and effluent samples were collected at each treatment stage over three treatment cycles from August 2021 – 2022 in Somanya, Ghana. A total of 108 composite samples were collected and analysed for N,P & K using standard procedures. The N, P & K losses at each stage of the treatment system were calculated using the mass balance principle and the nutrient flow diagrams were created using the Sankey diagram generator. Results show that, 59–86 % N, 8–40 % P and 49–81 % K were lost at the dewatering stages for all cycles. Losses were lumped together as either gaseous losses, adsorption to media surfaces or percolate. The overall nutrient recovery efficiency of the system was 6–17 % N, 20–37 % P & 17–24 % K in co-compost and treated effluent. Despite high removal efficiencies in the facultative ponds, the final effluent did not meet EU standards. Effluent may become a resource in geographies that have scarce water and less stringent regulations. This study recommends strategies and approaches such as biochar use, percolate/leachate recirculation and covering of compost piles to reduce nutrient losses.

分散的粪便污泥（FS）和食物垃圾（FW）处理系统，如共同堆肥系统，为低收入和中等收入国家的废物处理和养分回收提供了更实用的解决方案，但整个系统的养分回收和损失仍然缺乏量化。本研究旨在评估氮(N)、磷(P)和钾(K)的流动、损失和回收效率，以建议减少对水体污染的措施。从2021年8月至2022年8月，在加纳索马利亚的三个处理周期中，在每个处理阶段收集了粗FS、FW、堆肥和废水样本。共收集了108个复合样品，并使用标准程序分析了N，P &； K。利用质量平衡原理计算处理系统各阶段的N、P、K损失量，并使用Sankey图生成器生成养分流量表。结果表明，各循环脱水阶段氮、磷、钾分别损失59 ~ 86 %、8 ~ 40 %和49 ~ 81 %。损失被集中在一起作为气体损失，吸附到介质表面或渗透。该系统的总养分回收率为6-17 % N， 20-37 % P & 17-24 % K。尽管兼性池的去除效率很高，但最终流出物未达到欧盟标准。污水在水资源匮乏和法规不那么严格的地区可能成为一种资源。本研究建议使用生物炭、渗滤液/渗滤液循环和覆盖堆肥堆等策略和方法来减少养分损失。

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引用次数: 0

Effects of organic compost application with green tuff addition on paddy rice growth associated with soil pH elevation and microbial community shifts 有机堆肥加绿凝灰岩对水稻生长与土壤pH升高和微生物群落变化的影响

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2026-03-01 Epub Date: 2025-12-22 DOI: 10.1016/j.eti.2025.104721

Shun Tomita , Kyohei Kuroda , Hikari Kobayashi , Tatsuya Ohike , Masashi Hatamoto , Yosuke Shida , Takashi Narihiro

Green tuff, a porous volcanic ash-derived material with zeolite-like properties, is often produced as a byproduct of building stone processing in Japan. Organic compost is widely used in organic farming to improve soil fertility and stimulate microbial activity. Herein, we evaluated the effects of green tuff on paddy rice growth and soil prokaryotic communities in a 3-month pot experiment using paddy soil amended with three types of organic compost (OC1, OC2, and OC3). Green tuff application significantly increased plant height with OC1 (1.30-fold) and OC3 (1.18-fold), but not with OC2, compared to controls. It also elevated soil pH by 0.4–0.5 units across all composts tested, accompanied by shifts in microbial composition, including increased abundances of Chloroflexota and Anaeromyxobacter, taxa associated with carbon decomposition and nitrogen fixation. These findings suggest that green tuff may promote rice growth through soil pH elevation and prokaryotic community modulation.

绿色凝灰岩是一种多孔火山灰衍生材料，具有类似沸石的特性，通常是日本建筑石材加工的副产品。有机堆肥广泛应用于有机农业，以提高土壤肥力和刺激微生物活动。在3个月的盆栽试验中，利用3种有机堆肥（OC1、OC2和OC3）改良水稻土，研究了绿色凝灰岩对水稻生长和土壤原核生物群落的影响。与对照相比，施用绿色凝灰岩可显著提高OC1（1.30倍）和OC3（1.18倍）的株高，而施用OC2则无显著提高。在所有测试的堆肥中，它还将土壤pH值提高了0.4-0.5个单位，并伴随着微生物组成的变化，包括与碳分解和固氮相关的分类群氯氟菌和厌氧杆菌的丰度增加。这些结果表明，绿色凝灰岩可能通过提高土壤pH值和调节原核生物群落来促进水稻生长。

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引用次数: 0

Soil nitrate distribution and removal in a soybean–wheat system in response to groundwater level variations 大豆-小麦系统中土壤硝酸盐分布与去除对地下水位变化的响应

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2026-03-01 Epub Date: 2025-12-05 DOI: 10.1016/j.eti.2025.104683

Taohong Cao , Dongli She , Daniel Fernàndez-Garcia , Menghua Xiao , Wei Hu , Jiamin Ge , Yongchun Pan , Daming Yang , Yongqiu Xia

Nitrate (NO₃^–) contamination of groundwater caused by agricultural production processes has received considerable attention. However, the mechanisms governing NO₃⁻ migration and attenuation under varying groundwater table conditions remain unclear. Lysimeter tests provide an ideal supplement for studying such processes under controlled conditions. This study presents a lysimeter experiment that was designed for the investigation of NO₃^– transport and removal in the unsaturated zone. Experiments were conducted in soybean–wheat rotation systems from July 2022 to June 2024. Three groundwater depths (30, 60, and 90 cm) and three NO₃^–-N concentrations (0, 5, and 15 mg L⁻¹) were applied in the experiments. The results suggested that shallow water levels (30 cm) impeded NO₃^–-N accumulation in the soil profile. Under the different treatments, the upward NO₃^–-N transport flux (TF) decreased with increasing water table depth. Moreover, the NO₃^–-N removal capacity increased with increasing groundwater level, with the observed NO₃^–-N removal efficiency (RE) values ranging from 54.8 % to 87.4 % across the treatments. The optimal groundwater level for maximizing RE was 30 cm. The soil volumetric moisture content (VMC) played a crucial role in driving the generation of excess dinitrogen (N₂). When multiple related variables, including the VMC, were combined as predictive factors, the explanatory power of the regression model for denitrification increased. Our research bridges a key knowledge gap regarding the upward migration and transformation of groundwater NO₃^–-N in the unsaturated zone and provides a theoretical basis for improving soil and water pollution prevention and control measures.

农业生产过程中引起的地下水硝态氮（NO3 -）污染已引起广泛关注。然而，NO3在不同地下水位条件下的迁移和衰减机制尚不清楚。溶液计试验为在受控条件下研究这些过程提供了理想的补充。本研究提出了一种用于研究非饱和区NO3 -运输和去除的渗滤仪实验。试验于2022年7月至2024年6月在大豆-小麦轮作系统中进行。试验采用3种地下水深度（30、60和90 cm）和3种NO3——N浓度（0、5和15 mg L−1）。结果表明，浅水位（30 cm）阻碍了土壤剖面中NO3—N的积累。不同处理下，NO3——N向上输送通量（TF）随地下水位的增加而减小。NO3——N去除率随地下水位的增加而增加，各处理NO3——N去除率（RE）在54.8% % ~ 87.4% %之间。使RE最大化的最佳地下水位为30 cm。土壤体积含水量（VMC）对过量氮（N2）的产生起着至关重要的作用。当包括VMC在内的多个相关变量组合为预测因子时，回归模型对反硝化的解释能力增强。我们的研究弥补了地下水NO3—N在非饱和带向上迁移转化的关键知识空白，为完善土壤和水污染防治措施提供了理论依据。

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引用次数: 0

Optimal bioaugmentation fosters a highly integrated and efficient microbial network for rapid trichloroethene dechlorination 最佳的生物增强培养了一个高度集成和高效的微生物网络，用于快速三氯乙烯脱氯

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2026-03-01 Epub Date: 2025-12-05 DOI: 10.1016/j.eti.2025.104682

Hyunsu Kim , Jaejin Lee , Hyunsoo Lim , Kangsuk Kim , Keum Ju Yoon , Joonhong Park , Keunje Yoo

Bioaugmentation is a leading strategy for remediating groundwater contaminated with chlorinated ethenes. However, the optimized dosage to enhance synergetic interactions between consortia and electron donors remains poorly defined. This study investigated the effects of co-injecting a dechlorinating consortium (acclimated JL-1(KCTC11782BP)) at varying concentrations (0–10 % v/v) with lactate (0–1000 mM) on trichloroethene (TCE) degradation in microcosm systems over 40 days. Complete dechlorination of ethene occurred within 20 days across all treatments except 1000 mM lactate, which suppressed activity. The fastest and most robust response arose at 5.3 % acclimated JL-1 with 530 mM lactate, yielding ethene within 5 days. Quantitative PCR showed ∼10-fold enrichment of Dehalococcoides mccartyi tceA during complete TCE removal, and tceA abundance correlated positively with ethene production (p < 0.05). The presence of fermenting bacteria, including Pelosinus, Acetobacterium, and Sporomusa, was crucial for providing essential electron donors and nutrients to support the activity of organohalide-respiring bacteria, particularly Dehalococcoides. With a 5.3 % acclimated JL-1 and 530 mM lactate co-injection, dechlorination facilitated the development of a highly integrated microbial network, characterized by a low network diameter (2), a high average clustering coefficient (0.99), and a short average path length (1.045), all indicative of highly efficient and coordinated microbial interactions. These data delineate quantitative operating ranges for consortium and donor addition, identify an inhibitory upper bound for lactate, and mechanistically link community topology to dechlorination rates. This study can provide tunable, data-driven parameters for field bioaugmentation design, including initial JL-1 loading, lactate setpoints, and monitoring biomarkers.

生物强化是修复地下水中氯代乙烯污染的主要策略。然而，提高财团和电子给体之间协同作用的最佳剂量仍然不明确。本研究研究了不同浓度（0-10 % v/v）的脱氯组合（驯化的JL-1(KCTC11782BP)）与乳酸（0-1000 mM）共注射40天对微观系统中三氯乙烯（TCE）降解的影响。除1000 mM乳酸盐抑制活性外，所有处理的乙烯在20天内完全脱氯。在530 mM乳酸浓度为5.3% %时，JL-1的响应速度最快，在5天内产生乙烯。定量PCR结果显示，在完全去除TCE过程中，Dehalococcoides mccartyi的tceA丰度富集约10倍，tceA丰度与乙烯产量呈正相关（p <； 0.05）。包括Pelosinus、Acetobacterium和Sporomusa在内的发酵细菌的存在对于提供必要的电子供体和营养物质以支持有机盐呼吸细菌（特别是dehalococides）的活性至关重要。通过5.3 %驯化的JL-1和530 mM乳酸共注入，脱氯促进了高度整合的微生物网络的发展，其特点是网络直径小(2)，平均聚类系数高（0.99），平均路径长度短（1.045），所有这些都表明微生物相互作用高效协调。这些数据描述了联合体和供体添加的定量操作范围，确定了乳酸的抑制上限，并将群落拓扑结构与脱氯速率机械地联系起来。该研究可以为现场生物增强设计提供可调的数据驱动参数，包括初始JL-1加载、乳酸设定值和监测生物标志物。

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引用次数: 0

Microplastics and trace metals across the drinking water supply system of Addis Ababa, Ethiopia: A case study for low and middle-income countries 埃塞俄比亚亚的斯亚贝巴饮用水供应系统中的微塑料和微量金属：低收入和中等收入国家的案例研究

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2026-03-01 Epub Date: 2025-12-05 DOI: 10.1016/j.eti.2025.104684

Selamawit Gebremedhin Tekle , Kassaye Tolessa Sherge , Esayas Alemayehu , Maaike Vercauteren , Jana Asselman

Despite growing global concern about the potential public health impacts of microplastics and trace metals in drinking water, data from low and middle-income countries remain limited, particularly for microplastics, due to outdated and inconsistent sampling and analysis methods. Therefore, we examined microplastics and trace metals in tap water in Addis Ababa, Ethiopia, using advanced spectroscopic techniques as a case study for lower and middle-income countries. Samples were collected from randomly selected standard and slum areas of Addis Ababa during the dry and wet seasons, which included 71 samples analysed for microplastics with μFTIR spectroscopy and 48 samples analysed for dissolved trace metals with ICP-OES. Microplastics were detected in all tap water samples, with concentrations ranging from 0.004 to 1.33 MP L⁻¹ (average = 0.31 ± 0.31 MP L⁻¹), comparable to values in high-income countries. Statistically higher concentrations were measured in slum areas (0.41 ± 0.33 MPs/L) and during the wet season (0.36 ± 0.34 MPs/L). Polypropylene and polyethylene were the most common polymers, and particles sized 25–125 μm were predominant. Dissolved Ba, Zn, V, Cu, and Fe, with mean concentrations of 28.3 ± 6.5, 16.2 ± 19.7, 7.5 ± 0.5, 7.0 ± 2.6, and 5.1 ± 3.7 µg/L, respectively, were the only trace metals detected, showing no significant variation across locations or seasons and remaining below WHO and national drinking water guidelines. Estimated daily intake (EDI) and hazard index (HI) values of trace metals indicated minimal non-carcinogenic risk. No significant correlation was found between microplastic and trace metal concentrations. Overall, drinking water contamination levels were comparable to those reported in high-income countries.

尽管全球日益关注饮用水中微塑料和微量金属的潜在公共健康影响，但由于采样和分析方法过时和不一致，来自低收入和中等收入国家的数据仍然有限，特别是关于微塑料的数据。因此，我们对埃塞俄比亚亚的斯亚贝巴自来水中的微塑料和微量金属进行了检测，使用先进的光谱技术作为中低收入国家的案例研究。在干湿季节，随机选择亚的斯亚贝巴的标准区和贫民窟采集样品，其中71个样品用μFTIR光谱分析微塑料，48个样品用ICP-OES分析溶解微量金属。在所有自来水样品中都检测到微塑料，浓度范围为0.004至1.33 MP L - 1（平均= 0.31 ± 0.31 MP L - 1），与高收入国家的值相当。贫民窟和雨季的浓度分别为0.41±0.33 MPs/L和0.36±0.34 MPs/L。聚丙烯和聚乙烯是最常见的聚合物，粒径在25 ~ 125 μm之间。溶解的Ba、Zn、V、Cu和Fe的平均浓度分别为28.3±6.5、16.2±19.7、7.5±0.5、7.0±2.6和5.1±3.7 µg/L，是唯一检测到的微量金属，在不同地点或季节没有显着变化，仍低于世界卫生组织和国家饮用水指南。微量金属的估计每日摄入量（EDI）和危害指数（HI）值表明最低的非致癌风险。微塑料与微量金属浓度之间无显著相关性。总体而言，饮用水污染水平与高收入国家报告的水平相当。

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引用次数: 0