Journal of Environmental Chemical Engineering最新文献_第7页

Dynamics of engineered nanomaterials in the rhizosphere: Bidirectional feedback orchestrating multiscale responses 根际中工程纳米材料的动力学：双向反馈协调多尺度响应

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-12 DOI: 10.1016/j.jece.2026.121159

Weicheng Cao , Meng Qin , Yiting Wu , Qingyan Yu , Zhangchunzi Zhao , Xiaodong Nie , Zhongwu Li

Engineered nanomaterials (ENMs) hold transformative potential for diverse applications such as precision agriculture and soil remediation. However, assessing their subsequent ecological impacts, particularly within the dynamic rhizosphere, is complicated by complex feedback interactions among abiotic soil factors and plant-microbial dynamics. This review establishes a bidirectional feedback framework to elucidate how ENMs reshape rhizosphere microhabitats and, conversely, how soil-plant-microbe crosstalk dictates ENMs fates. Within this framework, soil properties, microbial extracellular matrices and root exudate chemodynamics emerge as master regulators of ENMs transformation cascades, thereby redefining paradigms of nanoecotoxicity and the associated feedback loops. Further, this review proposes the nano-feedback threshold (NFT) hypothesis, suggesting that microbial functional redundancy, plant tolerance and the chemodiversity of soil factors jointly buffer ENMs perturbations until a threshold is crossed, triggering cascading ecosystem reorganization. Critically, interdisciplinary integration approaches integrating multi-scale and multi-dimensional perspectives are necessary for decoding the feedback loops and NFT of ENMs in the rhizosphere. This review provides a conceptual basis for innovative ENMs development and identifies key strategies for leveraging ecologically balanced nanotechnology to support the achievement of Sustainable Development Goals in a changing climate.

工程纳米材料（enm）在精准农业和土壤修复等多种应用中具有变革潜力。然而，评估它们的后续生态影响，特别是在动态根际，是非生物土壤因子和植物-微生物动力学之间复杂的反馈相互作用是复杂的。这篇综述建立了一个双向反馈框架来阐明enm如何重塑根际微生境，反过来，土壤-植物-微生物串扰如何决定enm的命运。在此框架下，土壤特性、微生物胞外基质和根分泌物化学动力学成为enm转化级联的主要调节因子，从而重新定义纳米生态毒性的范式和相关的反馈回路。此外，本文提出了纳米反馈阈值（NFT）假说，认为微生物功能冗余、植物耐受性和土壤因子的化学多样性共同缓冲ENMs扰动，直到超过阈值，触发级联生态系统重组。重要的是，跨学科的整合方法整合了多尺度和多维视角，对于解码根际enm的反馈回路和NFT是必要的。这篇综述为创新的纳米技术发展提供了概念基础，并确定了利用生态平衡的纳米技术在不断变化的气候条件下支持实现可持续发展目标的关键战略。

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引用次数: 0

The critical role of alkaline microenvironment in advanced oxidation processes: A case study of calcium carbonate polymorphs 碱性微环境在深度氧化过程中的关键作用：以碳酸钙多晶体为例

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-12 DOI: 10.1016/j.jece.2026.121182

Ziyang Chu , Haibo Liu , Tianhu Chen , Xuehua Zou , Fuwei Sun , Dong Chen

The microenvironment at the solid–liquid interface plays a pivotal role in activating peroxymonosulfate (PMS). This study quantitatively compared the alkaline microenvironments on calcite (Cal), aragonite (Ara), and vaterite (Vtr) surfaces, regarding their efficacy in activating PMS for Cu-EDTA decomplexation and Cu removal. Among these polymorphs, the Vtr/PMS system achieved the highest Cu-EDTA decomplexation (90.5 %) and Cu removal efficiency (84.6 %). Quenching tests, probe-based kinetic modeling and EPR experiments identified singlet oxygen (¹O₂) as the dominant reactive species across all systems, with the Vtr/PMS system generating the highest ¹O₂ exposure (1.21 ×10⁻⁸ M·s). Moreover, in-situ analysis of the interfacial microenvironment revealed that the Vtr/PMS system created a significantly more alkaline microenvironment (pH = 9.87), characterized by a rapid diffusion velocity of 34 μm/s. This pronounced alkaline microenvironment exhibited a strong positive correlation with the accelerated production of ¹O₂, thereby promoting Cu-EDTA decomplexation. Furthermore, the Cu removal mechanism in the Vtr/PMS system involved a synergistic process combining adsorption, coprecipitation, and structural incorporation of Cu²⁺ during the transformation of Vtr into calcite. This work highlights the critical role of the alkaline microenvironment in carbonate mineral-based catalysis.

固液界面微环境对过氧单硫酸盐（PMS）的活化起关键作用。本研究定量比较了方解石（Cal）、文石（Ara）和水晶石（Vtr）表面的碱性微环境对激活PMS进行Cu- edta解解和Cu去除的效果。在这些多态性中，Vtr/PMS体系具有最高的Cu- edta解解率（90.5 %）和Cu去除率（84.6 %）。淬火试验、基于探针的动力学建模和EPR实验表明，单线态氧（1O2）是所有体系中的主要反应物质，其中Vtr/PMS体系产生的1O2暴露量最高（1.21 ×10−8 M·s）。此外，现场微环境分析表明，Vtr/PMS系统创造了一个碱性更强的微环境（pH = 9.87），其扩散速度为34 μm/s。这种明显的碱性微环境与1O2的加速产生，从而促进Cu-EDTA的分解具有很强的正相关。此外，在Vtr/PMS体系中，Cu的去除机制涉及到Vtr转化为方解石过程中Cu2+的吸附、共沉淀和结构结合的协同过程。这项工作强调了碱性微环境在碳酸盐矿物基催化中的关键作用。

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引用次数: 0

Enhancing Li+ exchange efficiency of lithium slag via alkaline adjustment: Investigation into the multi-cation systems and insights for waste recycling 通过碱性调节提高锂渣的Li+交换效率：多阳离子体系的研究及对废物回收利用的启示

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-12 DOI: 10.1016/j.jece.2026.121194

Na Wang , Jieyu Zhao , Hankun Zhang , Tianlei Wang , Jixue Shen , Qian Kang , Longfeng Tao , Xi Yue , Chuncheng Yang , Hongchao Li , Changjiang Liu

The growing demand for lithium batteries promotes the generation of a large amount of spodumene leached residue (SLR) in the lithium extraction industry, which leads to potential environmental challenges. To seek a proper treatment strategy for SLR, its ion-exchange behaviors were investigated systematically in solutions containing Li⁺, Na⁺, K⁺, Ca²⁺, and Mg²⁺. The results indicated that the SLR exhibited a pronounced positive selective response toward Li⁺, resulting in a Li₂O content of 0.74 %-1.86 % after ion-exchange in the mixed-cation system. Moreover, a proper adjustment of solution alkalinity can further enhance H⁺/Li⁺ ion-exchange, significantly improving the exchange efficiency to a maximum Li₂O content of 8.44 %. Repeated experiments as well as industrial SLR indicated good re-utilization potential. The present work provides a novel pathway for the resource utilization of SLR and offers a feasible new approach for lithium recovery from complex ion systems.

锂电池需求的增长促进了锂提取行业产生大量锂辉石浸出渣（SLR），这导致了潜在的环境挑战。为了寻找合适的SLR处理策略，系统地研究了SLR在Li+、Na+、K+、Ca2+和Mg2+溶液中的离子交换行为。结果表明，SLR对Li+表现出明显的正选择性响应，混合阳离子体系中离子交换后Li2O含量为0.74 %-1.86 %。适当调整溶液碱度可进一步促进H+/Li+离子交换，显著提高交换效率，Li2O含量最高可达8.44 %。重复实验和工业单反显示了良好的再利用潜力。本研究为SLR的资源化利用提供了一条新的途径，为复杂离子体系中锂的回收提供了一条可行的新途径。

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引用次数: 0

Enhancement of nutrient removal in a novel simultaneous nitrification, denitrification and phosphorus removal system via phosphorus recovery regulation under carbon limited condition 限碳条件下磷回收调控对新型硝化反硝化除磷系统中营养物去除效果的影响

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-12 DOI: 10.1016/j.jece.2026.121112

Ge Cao , Siyuan Zhai , Dong Ni , Jinxin Song , Jiaojiao Niu , Yingxin Zhao

A key challenge in traditional biological nutrient removal is the competition for limited organic carbon, which compromises the efficiency of both denitrification and phosphorus removal when carbon is scarce. To overcome this limitation, this study focused on low C/N ratio wastewater, and sequencing batch biofilm phosphorus recovery reactors (SBBPRs) were developed and constructed. This approach integrates simultaneous nitrification, denitrification and phosphorus removal (SNDPR) with phosphorus recovery (PR), reducing carbon source competition while achieving phosphorus resource recycling. Compared with the control groups (without PR), the nitrogen and phosphorus removal efficiencies of SBBPRs were remarkably enhanced. At C/N ratios of 5.0 and 3.0, the nitrogen removal efficiencies reached 87.7 % and 69.7 %, respectively, and the phosphorus recovery efficiencies were 53.7 % and 57.0 %, respectively. Based on the analysis of carbon source distribution within the SBBPRs, it can be observed that the phosphorus recovery process enhanced the storage of carbon sources in glycogen accumulating organisms (GAOs), thereby strengthening the endogenous denitrification process and ensuring the denitrification efficiency of the system. Electron transfer capacity and enzyme activity were also enhanced. The analysis of microbial community structure revealed that Candidatus_Competibacter, a denitrifying glycogen-accumulating organism (DGAO) was enriched in 31.0 % and 21.5 % at C/N ratios of 5.0 and 3.0, respectively, which provided a guarantee for endogenous denitrification. Meanwhile, the prediction of microbial Bugbase function reflected the system's excellent metabolic ability. This study provided new insights into low-carbon, high-efficiency nitrogen and phosphorus removal from wastewater.

传统生物去除营养物的一个关键挑战是对有限有机碳的竞争，当碳稀缺时，这损害了反硝化和除磷的效率。为克服这一局限，本研究以低碳氮比废水为研究对象，开发并构建了序批式生物膜磷回收反应器（SBBPRs）。该方法将同步硝化、反硝化和除磷（SNDPR）与磷回收（PR）相结合，在减少碳源竞争的同时实现磷资源的循环利用。与对照组（不加PR）相比，SBBPRs的氮、磷去除效率显著提高。在C/N为5.0和3.0时，氮的去除率分别为87.7 %和69.7 %，磷的回收率分别为53.7 %和57.0 %。通过对SBBPRs内碳源分布的分析，可以看出，磷回收过程增强了碳源在糖原积累生物（GAOs）中的储存，从而加强了内源反硝化过程，保证了系统的反硝化效率。电子传递能力和酶活性也得到增强。微生物群落结构分析显示，在C/N为5.0和3.0时，反硝化糖原积累菌（Candidatus_Competibacter）的富集率分别为31.0 %和21.5 %，为内源反硝化提供了保障。同时，微生物菌基功能的预测也反映了该系统良好的代谢能力。本研究为污水低碳高效脱氮除磷提供了新的思路。

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引用次数: 0

The influence of skeleton structure on peroxidase-like activity of Fe-doped carbonized polymer dots and application in dyes degradation 骨架结构对掺铁碳化聚合物点过氧化物酶样活性的影响及其在染料降解中的应用

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-12 DOI: 10.1016/j.jece.2026.121199

Ziwei Liu , Yingxi Qin , Wenkai Zhang , Yu Wang , Huangzhao Wei , Liang Feng , Chenglin Sun

Metal-doped carbonized polymer dots (CPDs) have shown remarkable potential for serving as nanozymes to mimic the catalytic performance of natural enzymes. However, systematic strategies for constructing metal-doped CPDs nanozymes with different skeletons and revealing the role of surface functional groups that influence peroxidase-like (POD-like) catalytic activity remain limited. Herein, CPDs-Fe with three kinds of skeletons (IE-Fe, TE-Fe, and TM-Fe) were prepared to explore POD-like catalytic activity. The intrinsic POD-like activities of the three CPDs-Fe were examined by catalytic oxidation of 3, 3′, 5, 5′-tetramethylbenzidine (TMB) with hydrogen peroxide (H₂O₂). The results showed that the performances of the three CPDs-Fe were superior to those of natural horseradish peroxidase (HRP) and other mimetic peroxidases. Notably, the POD-like activity of TE-Fe was better than that of IE-Fe and TM-Fe. TE-Fe was further applied to the photocatalytic degradation of malachite green (MG) and neutral red (NR), and the removal rates of both dyes had reached over 90 %. This study provides a new strategy for constructing metal-doped CPDs nanozymes with enhanced POD-like activity and highlights their potential for environmental remediation.

金属掺杂的碳化聚合物点（CPDs）在作为纳米酶模拟天然酶的催化性能方面显示出显著的潜力。然而，构建具有不同骨架的金属掺杂CPDs纳米酶和揭示表面官能团影响过氧化物酶样（pod样）催化活性的作用的系统策略仍然有限。本文制备了三种骨架（IE-Fe、TE-Fe和TM-Fe）的CPDs-Fe，以探索类pod的催化活性。用过氧化氢（H2O2）催化氧化3,3 ',5,5 ' -四甲基联苯胺（TMB），考察了三种CPDs-Fe的内在pod样活性。结果表明，三种CPDs-Fe的性能均优于天然辣根过氧化物酶（HRP）和其他类似过氧化物酶。TE-Fe的pod样活性明显优于IE-Fe和TM-Fe。TE-Fe进一步应用于光催化降解孔雀石绿（MG）和中性红（NR），两种染料的去除率均达到90% %以上。该研究为构建具有增强pod样活性的金属掺杂CPDs纳米酶提供了一种新的策略，并强调了它们在环境修复方面的潜力。

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引用次数: 0

Characteristics of Chlorella sp.-chitosan flocs in coagulation and dissolved air flotation 小球藻-壳聚糖絮凝剂在混凝和溶气浮选中的特性

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-12 DOI: 10.1016/j.jece.2026.121089

Michaela Pappa, Sanjaya Lama, Peter Adriaensens, Wouter Marchal, Dries Vandamme

Microalgae, photosynthetic microorganisms, thrive in nutrient-rich environments such as wastewater; however, their efficient separation from water requires effective and time-efficient harvesting techniques. This study considers the dynamic nature of microalgae and describes the interplay between the chitosan coagulant dosage and the microalgae’s growth phase (cells and algal organic matter (AOM)) in coagulation and dissolved air flotation for the green freshwater microalgae Chlorella sp., focusing on floc characteristics. In the exponential phase, the absence of the AOM resulted in the growth of very large (

≫ 1000 μ m

), strong (breakage rate

\sim 80 μ m

min⁻¹), and recoverable flocs (

\sim

75%) compared to the AOM-rich scenarios and the stationary phase. In the stationary phase, the flocs were smaller (223

- 230 μ m

), also moderately strong (

\sim 100 μ m

min⁻¹), but unable to reconnect (

\leq

60%). Overdosing chitosan had different effects; overall, the flocs grew bigger, and in the presence of AOM, the flocs maintained more than 70% of their size, which eroded over time. The findings underscore the impact of both chitosan dosage and growth phase on the floc’s properties, revealing distinct behaviours in the absence and presence of the AOM. This study provides valuable insights allowing the design of effective coagulant dosing strategies for microalgae biomass separation and downstream utilization.

微藻是一种光合微生物，在废水等营养丰富的环境中茁壮成长；然而，它们与水的有效分离需要有效和省时的收集技术。本研究考虑了微藻的动态特性，阐述了壳聚糖混凝剂用量与微藻生长阶段（细胞和藻类有机物（AOM））的相互作用，重点研究了绿色淡水微藻小球藻的絮凝和溶气浮选过程中的絮凝特性。在指数阶段，与富AOM和固定阶段相比，AOM的缺失导致了非常大（> 1000μm）、强（破碎率~ 80μm min−1）和可回收（~ 75%）的絮凝体的生长。在固定相，絮凝体较小（223 ~ 230μm），也中等强度（~ 100μm min−1），但不能重新连接（≤60%）。过量服用壳聚糖有不同的效果；总体而言，絮凝体变大，在AOM存在的情况下，絮凝体保持了70%以上的大小，随着时间的推移，絮凝体被侵蚀。研究结果强调了壳聚糖用量和生长阶段对絮凝体性能的影响，揭示了在没有和存在AOM时絮凝体的不同行为。该研究为微藻生物量分离和下游利用提供了有效的混凝剂剂量设计策略。

{"title":"Characteristics of Chlorella sp.-chitosan flocs in coagulation and dissolved air flotation","authors":"Michaela Pappa, Sanjaya Lama, Peter Adriaensens, Wouter Marchal, Dries Vandamme","doi":"10.1016/j.jece.2026.121089","DOIUrl":"10.1016/j.jece.2026.121089","url":null,"abstract":"<div><div>Microalgae, photosynthetic microorganisms, thrive in nutrient-rich environments such as wastewater; however, their efficient separation from water requires effective and time-efficient harvesting techniques. This study considers the dynamic nature of microalgae and describes the interplay between the chitosan coagulant dosage and the microalgae’s growth phase (cells and algal organic matter (AOM)) in coagulation and dissolved air flotation for the green freshwater microalgae <em>Chlorella</em> sp., focusing on floc characteristics. In the exponential phase, the absence of the AOM resulted in the growth of very large (<span><math><mrow><mo>≫</mo><mn>1000</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>), strong (breakage rate <span><math><mrow><mo>∼</mo><mn>80</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> min<sup>−1</sup>), and recoverable flocs (<span><math><mo>∼</mo></math></span>75%) compared to the AOM-rich scenarios and the stationary phase. In the stationary phase, the flocs were smaller (223<span><math><mrow><mo>−</mo><mn>230</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>), also moderately strong (<span><math><mrow><mo>∼</mo><mn>100</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> min<sup>−1</sup>), but unable to reconnect (<span><math><mo>≤</mo></math></span>60%). Overdosing chitosan had different effects; overall, the flocs grew bigger, and in the presence of AOM, the flocs maintained more than 70% of their size, which eroded over time. The findings underscore the impact of both chitosan dosage and growth phase on the floc’s properties, revealing distinct behaviours in the absence and presence of the AOM. This study provides valuable insights allowing the design of effective coagulant dosing strategies for microalgae biomass separation and downstream utilization.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"14 2","pages":"Article 121089"},"PeriodicalIF":7.2,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient and selective valorization of biomass-derived furfural to cyclopentanone via synergistic acidic PdAg/carbon dots catalysis 通过协同酸性PdAg/碳点催化高效选择性地将生物质衍生的糠醛转化为环戊酮

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-12 DOI: 10.1016/j.jece.2026.121185

Peng Gao , Li Liu , Guirong Bao , Dequan Chen , Jia Luo , Xuewu Ji , Wenyao Deng

The conversion of furfural (FF) to cyclopentanone (CPO) via selective hydrogenation-rearrangement represents a crucial route for sustainable, high-value valorization of renewable biomass feedstocks. In this study, carbon dots (CDs) were utilized as both a reducing and a dispersing agent for the one-pot green photoreduction synthesis of PdAg bimetallic catalysts supported on CDs (Pd_xAg_y/CDs) in aqueous phase. Among the catalysts with varying Pd-to-Ag molar ratios, the Pd_0.5Ag₁/CDs catalyst demonstrated exceptional performance, achieving 100 % FF conversion and 93.3 % CPO selectivity within 4 h at 200 °C. The superior activity is attributed to a synergistic effect between the acid sites on the CDs and the PdAg alloy, which facilitates the rearrangement of the intermediate furfuryl alcohol (FA). Mechanistic studies, including calculations of the free energy barriers for elementary steps from FA to 4-hydroxy-2-cyclopentenone, revealed a ring-opening pathway for the furan methyl carbocation, which dramatically reduces the reaction energy barrier to 47.1 kJ/mol from 195.8 kJ/mol of the Piancatelli pathway. This work not only presents an efficient and green catalyst for FF upgrading but also highlights the promising application of CDs in advanced catalytic systems for circular economy-driven chemical production.

糠醛（FF）通过选择性加氢重排转化为环戊酮（CPO）是可再生生物质原料可持续、高价值增值的重要途径。本研究利用碳点（cd）作为还原剂和分散剂，在水相中进行了一锅绿色光还原法制备了负载在cd （PdxAgy/CDs）上的PdAg双金属催化剂。在不同pd - ag摩尔比的催化剂中，Pd0.5Ag1/CDs催化剂表现出优异的性能，在200℃下，在4 h内实现了100% %的FF转化率和93.3 %的CPO选择性。这种优异的活性是由于CDs上的酸位与PdAg合金之间的协同作用，促进了中间体糠醇（FA）的重排。机理研究，包括从FA到4-羟基-2-环戊酮的基本步骤的自由能垒计算，揭示了呋喃甲基碳正离子的开环途径，该途径将反应能垒从Piancatelli途径的195.8 kJ/mol大幅降低到47.1 kJ/mol。这项工作不仅为FF升级提供了一种高效、绿色的催化剂，而且突出了cd在循环经济驱动的化工生产的先进催化系统中的应用前景。

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引用次数: 0

Tetracycline-derived N/P co-doped porous graphene-like carbon for effective removal of tetracycline: Synergistic adsorption-degradation mechanism 四环素衍生的N/P共掺杂多孔类石墨烯碳有效去除四环素：协同吸附-降解机制

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-12 DOI: 10.1016/j.jece.2026.121174

Shiye Cai , Chuanze Ma , C. Srinivasakannan , Gang Xue , Li Wang , Yaping Wang , Xinhui Duan

Tetracycline (TC) wastewater threatens ecosystems worldwide, and the conventional carbon materials are limited by the sustainability and efficiency. In this study, we innovatively proposed a waste-to-value strategy by directly converting TC into N/P co-doped hierarchically porous graphene-like carbon (NPGC) via a two-step pyrolysis process using ammonium polyphosphate and K₂CO₃ as activators. The results show that the wrinkled structure formed on NPGC has lamellar and porous characteristics, having high degree of graphitization and high specific surface area. In comparison with undoped graphene-like carbon (GC), NPGC has superior specific surface area (2534.49 m²/g), pore volume (1.79 cm³/g) and are more abundant with active sites, which synergistically promotes adsorption and degradation of TC. Performance evaluations indicate that NPGC delivers an ultrahigh adsorption capacity (1218.56 mg/g) via multiple mechanisms, including pore filling, electrostatic attraction, hydrogen bonding, and π-π interactions. Notably, when coupled with peroxymonosulfate (PMS), NPGC achieved 97.35 % removal of high-concentration TC (1400 mg/L). Mechanism studies reveal that degradation proceeds mainly via electron transfer, assisted by singlet oxygen, with defects, CO, pyrrolic N, and P-C moieties identified as key active sites. This work enables high-value conversion of antibiotic waste and offers a sustainable approach for treating high-concentration TC wastewater.

四环素废水威胁着全球生态系统，传统的碳材料受到可持续性和效率的限制。在这项研究中，我们创新地提出了一种废物到价值的策略，通过两步热解工艺，以聚磷酸铵和K2CO3为活化剂，将TC直接转化为N/P共掺杂的分层多孔石墨烯样碳（NPGC）。结果表明：在NPGC上形成的褶皱结构具有片状和多孔特征，石墨化程度高，比表面积高；与未掺杂的类石墨烯碳（GC）相比，NPGC具有更优越的比表面积（2534.49 m2/g）、孔隙体积（1.79 cm3/g）和更丰富的活性位点，协同促进TC的吸附和降解。性能评估表明，NPGC通过孔隙填充、静电吸引、氢键和π-π相互作用等多种机制提供了超高的吸附容量（1218.56 mg/g）。值得注意的是，当与过氧单硫酸盐（PMS）偶联时，NPGC对高浓度TC（1400 mg/L）的去除率达到97.35 %。机理研究表明，降解主要通过电子转移进行，单线态氧辅助，缺陷、CO、吡啶N和P-C是关键活性位点。这项工作使抗生素废物的高价值转化成为可能，并为处理高浓度TC废水提供了一种可持续的方法。

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引用次数: 0

Ultra-efficient recovery of radioactive Cs/Sr/Tb/Eu from wastewater via in situ co-synthesized ternary transition metal catalyzed bioelectrocatalytic reduction system 原位共合成三元过渡金属催化生物电催化还原体系超高效回收废水中的放射性Cs/Sr/Tb/Eu

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-12 DOI: 10.1016/j.jece.2026.121155

Yaqi Liu , Hui Lu , Changfei Gao , Yameng Wang , Haoran Liu , Huiqiang Ma , Bo Wang , Lifen Liu , Yihua Li , Xianbo Chang

The persistent threat posed by radioactive metal contamination necessitates the development of innovative and sustainable remediation strategies. In this study, we proposed a self-sustaining bioelectrocatalytic reduction system (BECRs) incorporating an in situ co-synthesized ternary Fe/Cu/Co@Z-CF cathode derived from zeolite imidazole salt skeleton (ZIF) -functionalized carbon felt. The engineered electrode demonstrated outstanding electrocatalytic performance, characterized by an ultrahigh exchange current density of 7.68 × 10⁻³ A cm⁻² and minimal charge transfer resistance of 0.11 Ω. These properties were attributed to the synergistic redox cycling of Fe-Cu-Co species and the enhanced exposure of active sites facilitated by the ZIF structure. Under optimized conditions at pH 11, the BECRs achieved removal efficiencies exceeding 98.28 % for targeted radionuclides (Cs⁺: 99.00 %, Sr²⁺: 98.28 %, Tb³⁺: 99.95 %, Eu³⁺: 99.97 %) while generating a stable bio-voltage of 730 mV. The removal mechanisms operated synergistically through three primary pathways: direct electroreduction of metals to elemental or metallic oxide forms at the catalytic cathode; electroflocculation mediated by in situ formation of Fe(OH)_x species and microbial adsorption by enriched pollutant-resistant microbial consortia, notably with a 16.3 % increase in Bacteroidota abundance. Density Functional Theory (DFT) calculations revealed charge complementarity among Fe/Cu/Co sites, accelerating oxygen reduction kinetics. Crucially, the electrode demonstrated negligible metal leaching across pH 3–11, confirming ecological safety. Kinetic analysed distinguish radionuclide-specific pathways: pseudo-first-order for Cs⁺/Sr²⁺ versus pseudo-second-order for Tb³⁺/Eu³⁺, informing selective recovery strategies. This work established a green, energy-positive paradigm for radioactive wastewater treatment, achieving simultaneous decontamination, resource recovery (metallic Cs/Sr/Tb/Eu) with significant potential for closed-loop nuclear effluent management.

放射性金属污染造成的持续威胁需要制定创新和可持续的补救战略。在这项研究中，我们提出了一个自我维持的生物电催化还原系统（becr），该系统包含一个原位共合成的三元Fe/Cu/Co@Z-CF阴极，该阴极来自沸石咪唑盐骨架（ZIF）功能化碳毡。该电极具有优异的电催化性能，具有7.68 × 10−3 A cm−2的超高交换电流密度和0.11 Ω的最小电荷转移电阻。这些特性归因于Fe-Cu-Co的协同氧化还原循环和ZIF结构促进活性位点的增强暴露。在pH为11的优化条件下，becr对目标放射性核素（Cs+: 99.00 %,Sr2+: 98.28 %,Tb3+: 99.95 %,Eu3+: 99.97 %）的去除率超过98.28 %，同时产生730 mV的稳定生物电压。去除机制通过三个主要途径协同作用：在催化阴极将金属直接电还原为元素或金属氧化物形式；电絮凝作用由Fe(OH)x的原位形成和富集的抗污染微生物群落的微生物吸附介导，特别是拟杆菌群丰度增加16.3 %。密度泛函理论（DFT）计算揭示了Fe/Cu/Co位点之间的电荷互补性，加速了氧还原动力学。至关重要的是，电极在pH 3-11范围内的金属浸出可以忽略不计，证实了生态安全性。动力学分析区分了放射性核素特异性途径：Cs +/ Sr 2 +的伪一阶和Tb3+/Eu3+的伪二阶，为选择性恢复策略提供了信息。这项工作为放射性废水处理建立了一个绿色、能源积极的范例，实现了同时去污、资源回收（金属Cs/Sr/Tb/Eu），具有闭环核废水管理的巨大潜力。

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引用次数: 0

Advances in membrane bioreactor and IFAS-MBR systems for treatment of wastewater containing pharmaceuticals 膜生物反应器和IFAS-MBR系统处理含药废水的研究进展

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-01-12 DOI: 10.1016/j.jece.2026.121186

Ratri Rachmawati , Ibrahim Maina Idriss , Zubair Hashmi , Nova Kurnia , Indah Prihatiningtyas , Asim Laeeq Khan , Muhammad Roil Bilad

Pharmaceutical residues in wastewater constitute an emerging environmental threat due to their persistence, bioactivity, and accumulation potential in aquatic ecosystems. Membrane bioreactors (MBRs) have demonstrated high efficacy in removing these contaminants by producing superior effluent quality and retaining micropollutants. Nevertheless, membrane fouling—intensified by pharmaceutical-induced production of extracellular polymeric substances (EPS) and soluble microbial products—remains the principal limitation to large-scale application. This review critically evaluates recent advances in MBR and integrated fixed-film activated sludge membrane bioreactor (IFAS-MBR) systems for pharmaceutical wastewater treatment. Emphasis is placed on the effects of pharmaceuticals on biomass characteristics, including floc morphology and EPS composition, and on comparative fouling behaviors in conventional and hybrid systems. IFAS-MBRs exhibit enhanced biomass retention, stability, and contaminant removal, often mitigating fouling. Various fouling control strategies are reviewed, encompassing advanced oxidation processes, adsorbent incorporation (activated carbon, biochar), quorum-quenching bioaugmentation, and antifouling membrane design using nanocomposites or superhydrophilic coatings. Additionally, microbial community adaptation is examined concerning degradation performance and fouling dynamics. The review concludes by identifying operational best practices and research priorities essential for optimizing MBR and IFAS-MBR configurations toward sustainable management of pharmaceutical-laden effluents.

废水中的药物残留物由于其持久性、生物活性和在水生生态系统中的积累潜力，构成了新的环境威胁。膜生物反应器（mbr）通过产生优异的出水质量和保留微污染物，已证明在去除这些污染物方面具有很高的效率。然而，由药物诱导的细胞外聚合物质（EPS）和可溶性微生物产物加剧的膜污染仍然是大规模应用的主要限制。本文综述了MBR和集成固定膜活性污泥膜生物反应器（IFAS-MBR）系统在制药废水处理方面的最新进展。重点放在药物对生物质特性的影响，包括絮团形态和EPS组成，以及在常规和混合系统中的比较污染行为。ifas - mbr表现出增强的生物量保留，稳定性和污染物去除，通常减轻污染。综述了各种污染控制策略，包括高级氧化工艺，吸附剂（活性炭，生物炭），群体猝灭生物增强，以及使用纳米复合材料或超亲水性涂层的防污膜设计。此外，微生物群落的适应研究涉及降解性能和污染动态。最后，审查确定了优化MBR和IFAS-MBR配置以实现含药废水可持续管理所必需的最佳操作做法和研究重点。

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