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A review of enhancement of chlorophenol bioremediation using synergistic effects between zero-valent iron and microorganisms

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Biodegradation 2025年第3期36卷 47页

作者： Hao Liu Deli Wu Weishi Wang State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science & Engineering Key Laboratory of Urban Water Supply Water Saving and Water Environment Governance in the Yangtze River Delta of Ministry of Water Resources Shanghai Institute of Pollution Control and Ecological Security Tongji University Shanghai 200092 China. Shanghai Jianke Environmental Technology Co. Ltd Shanghai 200032 China. State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science & Engineering Key Laboratory of Urban Water Supply Water Saving and Water Environment Governance in the Yangtze River Delta of Ministry of Water Resources Shanghai Institute of Pollution Control and Ecological Security Tongji University Shanghai 200092 China. wudeli@***. Department of Civil and Environmental Engineering Colorado School of Mines 1500 Illinois St. Golden CO 80401 USA.

Chlorophenols (CPs) are a class of synthetic organic chemicals that are widely distributed in soil and groundwater, posing significant risks to human health and the environment due to persistence, acute toxicity, and potential carcinogenicity. Zero-valent iron (ZVI) has emerged as a promising remediation technique for CPs, but its efficacy is often hindered by surface passivation, non-target competition, and limited mobility in the subsurface. While CPs are inherently biodegradable, their high toxicity and the lack of functional enzymes in indigenous microbial systems restrict the effectiveness of bioremediation. Recently, a hybrid system integrating ZVI with microbial degradation draws increasingly research interests, paving out a new path for sustainable degradation of CPs. These systems leverage the synergistic interactions between ZVI and microorganisms to enhance CP biodegradation. This review provides a comprehensive analysis of the advancement. key topics include the enhancement of electron transfer, alterations to microbial communities, mitigation of toxicity, and the interplay between other processes. Operation modes, ZVI dosage, and interactions with naturally occurring iron minerals, are also discussed in the context of applications in soil and groundwater remediation. Despite research efforts and successful implementations, critical knowledge gaps remain, particularly in regard to the characterization of microbial processes in natural systems, highlighting the need for future research.

关键词： Chlorophenol degradation Hybrid treatment Microorganisms Remediation Zero-Valent Iron

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Achieving partial nitrification and denitrification coupled with simultaneous partial nitrification, anammox, and denitrification (PND-SNAD) by the inhibition of sulfide to accomplish stabilized nitrogen removal

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environmental Research 2025年 278卷

作者： Bian, Yihao Fu, Kunming Xu, Ruotong Guan, Teng Huo, Aotong Zhang, Ruibao Li, Xueqin Qiu, Fuguo Zhang, Yongji State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China Key Laboratory of Urban Storm Water System and Water Environment Ministry of Education Beijing University of Civil Engineering and Architecture Beijing100044 China

The simultaneous partial nitrification, anammox, and denitrification (SNAD) process is widely applied for treating high-ammonia wastewater, but its application to low-ammonia organic wastewater has been scarcely explored. In this study, a partial nitrification and denitrification coupled with simultaneous partial nitrification, anammox, and denitrification (PND-SNAD) system was established to treat organic wastewater with low ammonia concentration. Experimental results revealed that sulfide at 5 mg/L selectively inhibited nitrite-oxidizing bacteria (NOB) but had little effect on ammonium-oxidizing bacteria (AOB). Finally, NOB was suppressed in PND system by intermittently adding sulfide to the PND system. The PND system provided nitrite and activated sludge enriched with AOB to the SNAD system during stable operation. The SNAD system demonstrated chemical oxygen demand (COD) and nitrogen removal efficiencies of 89.86 % and 86.45 %. Candidatus Brocadia and Nitrosomonas were the main ammonium oxidizing bacteria (AnAOB) and AOB. The contribution of AOB and denitrifying bacteria (DNB) to nitrogen transformation was 67.15 % and 25.33 % in the PND system. In the SNAD system, the contributions of AnAOB, AOB, and DNB were 34.40 %, 33.59 %, and 27.56 %, respectively. Overall, this study provided a new sustainable strategy for treating organic wastewater with low ammonia concentration. © 2025 Elsevier Inc.

关键词： Sulfur compounds

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High-density sampling reveals the occurrence, levels and transport flux of 15 polycyclic aromatic hydrocarbons derivatives (PAHs-d) along the Yangtze River

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Science of the Total environment 2025年 958卷 177907页

作者： Xie, Yu Guo, Jiaxun Fan, Qinya Huang, Shier Qi, Weixiao Cao, Xiaofeng Peng, Jianfeng Chen, Yufeng Chen, Min Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Yangtze Eco-Environment Engineering Research Center China Three Gorges Corporation Beijing100084 China School of Environment and Spatial Informatics China University of Mining and Technology Xuzhou221116 China

Polycyclic aromatic hydrocarbons derivatives (PAHs-d) have higher toxicity levels compared to its parent polycyclic aromatic hydrocarbons (PPAHs). Their partitioning in different media and large-scale transport patterns in rivers remain largely unknown. This study investigated the occurrence of 15 PAHs-d and 19 PPAHs in water and suspended particulate matter (SPM) of the Yangtze River between 2019 and 2020. The range of Σ15PAHs-d concentrations was 20.54 to 2010.03 ng·L−1 in water and 0.62 to 29.80 μg·g−1 in SPM. The primary PAHs-d components were 2,6-dimethylnaphthalene, 2-methylnaphthalene, and anthraquinone. The range of Σ19PPAHs concentrations in water and SPM was 34.89 to 739.53 ng·L−1 and 0.37 to 204.62 μg·g−1, respectively. And low-ring PAHs-d and PPAHs were more prevalent in water than SPM. Partitioning behaviors indicated that PAHs-d and PPAHs were more readily partitioned into water and SPM during normal and dry periods, respectively. The concentrations of PAHs-d saw significant changes in their spatial distribution, which rose in water and reduced in SPM in downstream of the Three Gorges Dam. This is due to the dam's blocking effect on sediment transport. Positive matrix factorization source analysis revealed biomass combustion upstream and vehicle emissions downstream as primary sources, shaped by the evolving energy consumption patterns of urban areas situated around the Yangtze River. The annual fluxes of PAHs-d in water and SPM of the Yangtze River were 90.40 t·yr−1 and 11.95 t·yr−1, representing 88.3 % and 11.7 % of the overall PAHs-d fluxes, respectively. The total fluxes of PAHs-d and PPAHs in water and SPM tended to increase spatially along the river, with growth rates exceeding 76 and 24 times, respectively. Interception within the Three Gorges Reservoir area has resulted in the differences in the concentration and transport distribution of PAHs-d and PPAHs upstream and downstream, which play important roles in reducing PAHs-d and PPAHs entry int

关键词： Matrix factorization

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Corrigendum to "Landscape ecological risk assessment and driving factors analysis based on optimal spatial scales in Luan River Basin, China" [Ecol. Indic. 169 (2024) 112821] (Ecological Indicators (2024) 169, (S1470160X24012780), (10.1016/***.2024.112821))

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Ecological Indicators 2025年 173卷

作者： Yang, Nijuan Zhang, Ting Li, Jianzhu Feng, Ping Yang, Nina State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation Tianjin University Tianjin300350 China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

The authors regret "the incorrect use of Figure 1 in the paper. The original figure has now been replaced with the revised figure."[Figure presented] Revised Figure 1 The authors would like to apologise for ...

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A Data-Driven Analysis to Identify Research Hotspots and Trends in the Treatment of Algal Toxins in water environment

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Current pollution Reports 2025年第1期11卷 1-16页

作者： Xue, Zhao Jin, Lili Zhang, Longhao Lu, Junjie Zuo, Naiyuan Sun, Xiangzhou Huang, Hui Ren, Hongqiang State Key Laboratory of Water Pollution Control and Green Resource Recycling School of the Environment Nanjing University Nanjing People’s Republic of China Institute for the Environment and Health Nanjing University Suzhou Campus Suzhou People’s Republic of China

Over the past 2 decades, due to eutrophication and other factors, algal toxins in water bodies have become increasingly prevalent, posing a significant threat to aquatic ecosystems and human health. The complex properties of algal toxins and the potential environmental risks they pose urgently demand comprehensive research and effective solutions. Currently, the methods to address this issue mainly cover physical, chemical, and biological means. Oxidation, photocatalysis, and adsorption have emerged as the primary techniques. However, each has its own advantages and disadvantages in terms of removal efficiency, cost, and environmental impact. Previous studies were mostly small-scale laboratory explorations and failed to analyze the overall research trends of algal toxins from a macroscopic perspective. This study, by employing bibliometrics and patent analysis methods, comprehensively examines the research status and development trends of treating algal toxins in water. This study carried out a data-driven analysis of 3354 papers and 380 patents from the Web of Science Core Collection and Derwent Innovation Index databases up until 2023. The keyword co-occurrence network analysis and technology classification jointly revealed the main knowledge structure of algal toxin research, which is formed and interconnected by contaminants, treatment processes, toxicity, and degradation characteristics. Moreover, current research indicates that oxidation, photocatalysis, and adsorption are the main removal methods. Further exploration found that hot areas include the low-carbon degradation of algal toxins in eutrophic waters. In recent years, cylindrospermopsin and nodularin have become hot pollutants in algal toxin treatment. Currently, the research focuses more on the removal mechanism of algal toxins and the risk assessment under the exposure to cylindrospermopsin and nodularin. This study also summarizes the removal efficiencies and principles of physical, chem

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Assessing the Significance of Regional Transport in Ozone pollution through Machine Learning: A Case Study of Hainan Island

ACS ES&T Air

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ACS ES&T Air 2025年第3期2卷 416-425页

作者： Jun Liu Meiru Chen Biwu Chu Tianzeng Chen Qingxin Ma Yonghong Wang Peng Zhang Hao Li Bin Zhao Rongfu Xie Qing Huang Shuxiao Wang Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China；University of Chinese Academy of Sciences Beijing 100049 China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China；Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China；University of Chinese Academy of Sciences Beijing 100049 China School of Environment Tsinghua University Beijing 100084 China College of Ecology and Environment Hainan University Haikou 570228 China；Hainan Research Academy of Environmental Sciences Haikou 571126 China School of Environmental Science and Engineering Hainan University Haikou 570228 China

Regional transport of air pollutants is a serious challenge to outdoor O3pollution control. Characterizing the transport of air pollutants by traditional air quality models heavily relies on accurate precursor emission inventories, chemical reaction mechanisms, and meteorological factors. In this study, the pollutant concentrations of upwind cities were incorporated as features into a random forest regression model (Traj-RF) to investigate the contribution of regional transport to local O3pollution. Hainan island was selected as the target area in this study, due to its air quality being affected significantly by regional transport. The Traj-RF model shows good predictive performance for O3with a coefficient of determination (R2) of 0.68 on the independent test set based on only observed air pollutants concentrations and meteorological data. The results of the Traj-RF model show that direct O3transport from upwind areas contributes approximately 27.5% to the O3concentration in Hainan, effectively highlighting the substantial role of regional transport in Hainan’s O3pollution. This refined machine learning method may have the potential to assess the impact of pollutant transport on regional air quality.

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Technology pathway to decarbonisation in the building sector based on a policy review of major economies

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Advances in Climate Change Research 2025年第1期16卷 183-198页

作者： Jie XIONG Si-Yue GUO Xian ZHANG Run-Ming YAO Pan-Yu ZHU Xue-Ting PENG Nian YANG Ya-Ting ZHANG Mai SHI Xi LU School of Environment State Key Joint Laboratory of Environment Simulation and Pollution ControlTsinghua UniversityBeijing 100084China School of Architecture and Urban Planning Chongqing Jiaotong UniversityChongqing 400074China Institute for Energy Environmental&EconomyTsinghua UniversityBeijing 100084China The Administrative Centre for China’s Agenda 21(ACCA21) Ministry of Science and Technology(MOST)Beijing 100038China School of the Built Environment University of ReadingReading RG66DFUnited Kingdom Joint International Research Laboratory of Green Buildings and Built Environments(Ministry of Education) Chongqing UniversityChongqing 400045China Synavision GmbH Bielefeld 33602Germany Beijing Laboratory of Environmental Frontier Technologies Tsinghua UniversityBeijing 100084China Institute for Carbon Neutrality Tsinghua UniversityBeijing 100084China

Building decarbonisation is crucial to achieve the carbon neutrality *** many studies have been conducted,a gap remains in the research concerning technology development and policy *** study conducted a comprehensive review of the decarbonisation pathways proposed by the ten largest economies globally for the building sector at the national *** synthesising the relevant literature,a systemic framework of technologies applicable to the building sector is proposed,encompassing five major categories of technologies:energy efficiency,electrification and clean heating,on-site generation and flexible utilisation,green construction materials and processes,and sufficiency in operation and *** overview of each country’s emphasis on technological development,future expectations and prevailing trends in technology deployment is summarised and *** countries'policy documents address energy efficiency,electrification,and clean heating;however,the importance of flexibility and sufficiency warrants further *** balance among different technologies,the impacts of lock-in effects,and the considerations of equity and justice in renovation processes are critical concerns for the future deployment of *** study can provide a meaningful reference for the following research phase and the development of pathways to decarbonise buildings for countries worldwide.

关键词： Decarbonisation Building sector Carbon neutrality Pathway Framework of technologies

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Pre-biodrying enhanced lignin degradation to promote aromatic macromolecular humic acid formation in double-phase composting

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Waste Management 2025年 202卷 114851页

作者： Mo, Jiefei Zhao, Changxun Fang, Chenxuan Long, Yuzhou Han, Yujie Mei, Qingqing Wu, Weixiang Institute of Environment Pollution Control and Treatment College of Environmental and Resource Sciences Zhejiang University Hangzhou310058 China Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety Technology Zhejiang310058 China State Key Laboratory of Soil Pollution Control and Safety Zhejiang University Hangzhou310058 China Innovation Center of Yangtze River Delta Zhejiang University Zhejiang311400 China

A 24-h pre-biodrying phase was introduced in 10-d double-phase biodrying-enhanced composting (BEC) to accelerate the humification of kitchen waste by promoting the generation of phenolic-rich aromatic skeletons, key humic precursors for the lignin-protein and polyphenol pathways. To explore how biodrying promotes phenolic hydroxyl accumulation, macromolecule decomposition, particularly lignin, was investigated. Compared to day 9 of 15-d conventional bioaugmented mechanical composting (BMC) without pre-biodrying, BEC achieved 78.32 ± 15.96 % higher lignin degradation by day 9 (p −1). Microbial analysis further revealed that oxygen availability, improved by frequent stirring and aeration during biodrying, enriched Bacillaceae and Issatchenkia, which accelerated bioheat generation and created thermophilic conditions favorable for Bacillus and Saccharomonospora capable of lignin demethoxylation (via vanAB, ligM) and β-O-4 cleavage (via ligD, ligL, ligE, ligF, ligG). High temperatures also enhanced microbial cooperation, enabling the lignin degraders to obtain nutrients, cofactors, and detoxification agents for basal metabolism and lignin degradation from Oceanobacillus, Gracilibacillus, Sinibacillus, Georgenia, Nigrospora, and Aspergillus, thereby reducing their metabolic burden and allowing them to focus on lignin degradation. This study is the first to unveil the humification mechanism during composting from the perspective of macromolecule decomposition, especially lignin, for the generation of phenolic-rich aromatic skeletons as key humic precursors, providing theoretical support for developing simple, effective strategies to accelerate composting. © 2025 Elsevier Ltd

关键词： Aspergillus

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Ecological Mechanisms of Carbon Sequestration in Vegetated Coastal Wetland Ecosystem: Exploring the Roles of Biodiversity and environmental Changes

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Journal of Marine environmental Engineering 2025年第1期12卷 35-47页

作者： Liu, Lele Du, Ning Eller, Franziska Ye, Siyuan Li, Xiaowen Wei, Jifang Guo, Yaolin Brix, Hans Guo, Weihua Key Laboratory of Ecological Prewarning Protection and Restoration of Bohai Sea Ministry of Natural Resources School of Life Sciences Shandong University 72 Binhai Road Qingdao266237 China Department of Biology Aarhus University Ole Worms Alle 1 Aarhus8000 Denmark Key Laboratory of Coastal Wetland Biogeosciences Qingdao Institute of Marine Geology China Geological Survey Qingdao266000 China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution Control Beijing Normal University Beijing100875 China North China Sea Ecological Center of the Ministry of Natural Resources Qingdao266000 China Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary Institute of Biodiversity Science and Institute of EcoChongming School of Life Sciences Fudan University Shanghai200433 China

Vegetated coastal wetlands, also called blue carbon ecosystems, are significant carbon sinks that play a vital role in global climate change mitigation. Understanding the ecological mechanisms of carbon sequestration in these ecosystems is essential to effectively manage and conserve them. This review focuses on macroecological mechanisms of carbon transfer and microecological mechanisms of carbon stabilization in vegetated coastal wetland ecosystems. Macroecological mechanisms include the horizontal and vertical carbon transport coupled to plant ecophysiology and community diversity, while microecological mechanisms include processes related to soil organic matter dynamics, such as decomposition, stabilization, and mineralization. key scientific issues surrounding these mechanisms include transformation between carbon sink and source, stabilization mechanisms of organic carbon, and environmental effects at multiple time scales. A comprehensive research framework is also presented, which integrates spatial-temporal pattern, macroecological mechanism, microecological mechanism, and ecological engineering. Addressing these key scientific questions within the proposed framework can provide valuable insights into the significant role of biodiversity in blue carbon ecosystems, as well as significant implications for management and conservation of vegetated coastal wetlands under global climate changes. © 2025 Old City Publishing, Inc.

关键词： Ecosystems

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Fe3O4 nanoparticles promote methanogenesis in propionate acclimated system

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Bioresource Technology 2025年 431卷 132608页

作者： Wang, Fangzhou Song, Ge Zhang, Mou Zhao, Shunan Wang, Tuo Zhao, Kai Wang, Xin Liu, Ruiping Center for Water and Ecology State Key Laboratory of Regional Environment and Sustainability School of Environment Tsinghua University Beijing100084 China MOE Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Remediation and Pollution Control College of Environmental Science and Engineering Nankai University No. 38 Tongyan Road Jinnan District Tianjin300350 China Key Laboratory of Environmental Aquatic Chemistry State Key Laboratory of Regional Environment and Sustainability Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China

Propionate accumulation is common in anaerobic digestion systems, while Fe3O4 nanoparticles (Fe3O4 NPs) show potential in steering direct interspecies electron transfer (DIET) to facilitate methanogenesis from propionate. However, the effect of Fe3O4 NPs in stable microbial communities remains unclear. This study demonstrated that 1.0 g/L Fe3O4 NPs enhanced propionate degradation and methane production by 220 % and 55 % of the propionate-acclimated microbial consortia post-shock loading, as evidenced by batch-test. High propionate concentrations suppressed Geobacter, yet Fe3O4 NPs enabled electron syntrophy between alternative DIET-participants (Arcobacter, Syntrophobacter) and methanogens (Methanothrix, Methanobacterium) serving as electron conduits. Network analysis further revealed that Fe3O4 NPs activated interactions among potential electroactive microbes, highlighting the potentially ubiquitous presence of electron syntrophy. Even in propionate-stressed microbial communities, such mutualism may be rapidly activated by Fe3O4 NPs, offering a practical solution for mitigating propionate accumulation and enhance digester performance. © 2025 Elsevier Ltd

关键词： Hematite

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