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New insights into autochthonous fungal bioaugmentation mechanisms for recalcitrant petroleum hydrocarbon components using stable isotope probing

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Science of the Total environment 2025年 958卷 178082页

作者： Huang, Qihui Dai, Yeliang Yang, Guiqin Zhuang, Li Luo, Chunling Li, Jibing Zhang, Gan Guangdong Key Laboratory of Environmental Pollution and Health College of Environment and Climate Jinan University Guangzhou511443 China State Key Laboratory of Organic Geochemistry and Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou510640 China University of Chinese Academy of Sciences Beijing100039 China Ningbo Research Institute of Ecological and Environmental Sciences Ningbo315000 China

Autochthonous fungal bioaugmentation (AFB) is a promising strategy for the microbial remediation of petroleum hydrocarbon (PH)-contaminated soils. However, the mechanisms underlying AFB, particularly for degrading recalcitrant PH components, are not fully understood. This study employed stable isotope probing (SIP) and high-throughput sequencing to investigate the AFB mechanisms of two hydrocarbon-degrading fungi, Fusarium solani LJD-11 and Aspergillus fumigatus LJD-29, focusing on three challenging PH components: n-Hexadecane (n-Hex), Benzo[a]pyrene (BaP), and Dibenzothiophene (DBT). Our findings indicate that both fungal strains significantly enhanced pollutant removal rates, with combined application yielding optimal results. AFB treatment reduced the microbial diversity index and altered the soil microbial community, especially affecting fungal populations. A significant correlation between the microbial diversity index and degradation efficiency suggests that greater diversity enhances pollutant removal. SIP analysis showed that LJD-11 and LJD-29 could directly assimilate n-Hex and DBT, but not BaP. Correlation analyses between functional microorganisms and other biological indicators suggest that the removal of pollutants is also attributable to indigenous functional bacteria. Additionally, non-inoculated functional fungi present in the soil play a crucial role in BaP degradation. These findings reveal distinct degradation pathways for the three pollutants. The addition of carrier substrate reduced the complexity of the network, while AFB treatment restored it. In addition, the combined fungal treatment resulted in higher network parameters, leading to a more complex and stable network structure. These results provide insights into the mechanisms of AFB for degrading recalcitrant PH components, underscoring its potential for in situ bioremediation of petroleum-contaminated soils. © 2024 Elsevier B.V.

关键词： Soil pollution

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Janus Photoelectrocatalytic Filter for Sustainable Water Decontamination

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SSRN 2023年

作者： Jin, Limin Sun, Meng Yang, Jianping Huang, Yingping Liu, Yanbiao College of Environmental Science and Engineering Textile Pollution Controlling Engineering Center The Ministry of Ecology and Environment Donghua University Shanghai201620 China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai201620 China Yichang443002 China Shanghai Institute of Pollution Control and Ecological Security 1239 Siping Road Shanghai200092 China

Herein, we conceive a Janus photoelectrocatalytic filter (Sb-Fe/MXene) by depositing Sb single-atoms (Sb-SA) and Fe nanoclusters (Fe-NC) decorated MXene mixture on either side of Ni-foam substrate, respectively, which realized sustainable and efficient generation of hydrogen peroxide (H2O2) and hydroxy radical (•OH) without any chemical input. Photocatalytic-side ensures that the accumulated holes at Ti vacancies neighboring the Sb-SA promote the 4e− water oxidation reactions to produce O2, while the Sb-SA sites collect electrons forming reducing centers for non-sacrificial H2O2 production via the 2e− oxygen reduction reaction. Electrocatalytic-side guarantees the circulation of ≡Fe(III)/≡Fe(II) by continuously exposing"fresh" reactive sites by dissociating H2O2 on the ≡Fe(II). This further prohibits iron sludge accumulation with an enhanced remedy of micropollutants, even under neutral conditions for wastewater. The collaborative effect between photochemistry and electrochemistry establishes a strategy for energy conversion and environmental remediation using a Janus photoelectrocatalytic filtration system. © 2023, The Authors. All rights reserved.

关键词： Hydrogen peroxide

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The effects of phosphorus on the fate and transformation of sediment-associated cadmium from river sediments

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Science of the Total environment 2024年 957卷 177812页

作者： Xu, Fen Liao, Yuhui Bai, Shihao Yang, Rui Li, Yaoming Yuan, Jianfei State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu610059 China College of Ecology and Environment Chengdu University of Technology Chengdu610059 China State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution Chengdu University of Technology Chengdu610059 China Chengdu610218 China

The coexistence of phosphorus (P) and cadmium (Cd) in river sediments poses a significant challenge for remediating these contaminants in aquatic environments, given the ongoing debates regarding their interactions. This study aimed to elucidate the impact of water-soluble phosphorus (PO43−) on the fate and transformation of sediment-associated Cd under varying conditions. The findings revealed that the impact of PO43− on the release of sediment-associated Cd depends on the presence or absence of cations such as Ca2+ and Mg2+, with Ca2+ exerting a more pronounced effect than Mg2+. In the absence of Ca2+ and Mg2+, PO43− effectively inhibits the release of sediment-associated Cd by facilitating the formation of more stable precipitates, including (Cd)3(PO4)2. Conversely, when Ca2+ and Mg2+ are present, they compete with Cd for PO43− binding sites, reducing the formation of (Cd)3(PO4)2 and indirectly enhancing the release of sediment-associated Cd. Furthermore, redox conditions play a significant role in Cd release from sediments depending on its fractions. However, this influence may be less prominent compared to that caused by PO43−. Notably, increasing sediment ageing time diminishes the enhancing effect exerted by PO43−, likely attributed to the conversion of Cd into a more stable residual fraction. This study offers further insights into the impact of PO43− on the fate and transformation of sediment-associated Cd within river sediments, necessitating simultaneous consideration of multiple variables such as cations, redox conditions, and sediment ageing. © 2024

关键词： Rivers

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Effect of Nh4+-N and Ammonia-Oxidizing Bacteria on Atenolol Removal During Simulated Riverbank Filtration

SSRN

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SSRN 2022年

作者： Zhao, Jian Fang, Shangbiao Qi, Weixiao Liu, Huijuan Qu, Jiuhui Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Beijing Laboratory of Environmental Frontier Technologies School of Environment Tsinghua University Beijing100084 China

Riverbank filtration (RBF) is used worldwide for drinking water production and has been proven to remove organic micro-pollutants (OMPs) mainly by adsorption and biodegradation. Since NH4+-N is a common contaminant in surface water, its effect on ammonia-oxidizing bacteria (AOB) and the further role of AOB co-metabolism on OMPs degradation during RBF is unknown. Here, we selected atenolol as a typical OMP to explore the effect of NH4+-N concentration on atenolol removal and the role of AOB in atenolol biodegradation. The results showed that RBF is an effective barrier for atenolol mainly by biodegradation and adsorption. The ratio of biodegradation and adsorption to atenolol removal was related to atenolol ***, low concentration (500 ng/L) is almost completely removed by adsorption, while higher concentration (100 μg/L) is removed by biodegradation (51.7%) and adsorption (30.8%). Therefore, long-term difference in influent NH4+-N concentrations showed insignificant impact on atenolol (500 ng/L) removal as adsorption was the dominated removal mechanism. Besides, AOB enhanced the removal of atenolol (100 μg/L) as biodegradation played a more crucial role in removing atenolol under this concentration. Both AOB and heterotrophic bacteria can degrade atenolol during RBF, but the degree of AOB contribution is probably related to the concentration of atenolol exposure. The main reactions occurred during atenolol biodegradation possibly included primary amide hydrolysis, hydroxylation and secondary amine depropylation. About 90% of the bio-transformed atenolol was produced to atenolol acid. AOB could transform atenolol to atenolol acid by inducing primary amide hydrolysis but failed to degrade atenolol acid further under the conditions of this paper. This study provides novel insights regarding the roles played by AOB in OMPs biotransformation during RBF. © 2022, The Authors. All rights reserved.

关键词： Biodegradation

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Revisiting the Scale Design of Electrical Confinement Interfaces in Water Purification Applications

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environmental science & technology 2025年第23期59卷 2025 Jun 3页

作者： Min Chen Guihua Yu Jiuhui Qu Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 P. R. China. Materials Science and Engineering Program and Walker Department of Mechanical Engineering The University of Texas at Austin Austin Texas 78712 United States. Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 P. R. China.

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Real-Time Visualized Generator for the simulation of Wastewater Quality and Quantity Variations in the Sewer System

SSRN

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SSRN 2024年

作者： Liu, Yanchen Islam, Md Sahidul Huang, Xia Li, Bo Chen, Jiale Min, HongPing Tang, Dingding Mao, Jianhua Wang, Moran Zhang, Mingkai Shi, Hanchang State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China China Construction Third Bureau Green Industry Investment Co. Ltd Wuhan430100 China Beijing Enterprises Water Group Limited Beijing100102 China South China Institute of Environmental Science Ministry of Ecology and Environment Guangzhou510655 China

The lack of information or missing connection of sewer pipes in both combined and separated systems seriously disturbs the obtaining of real regulated operational information of the sewerage system. In order to accurately regenerate the lost actual operational data along sewer shed, a visualized generator based on real-time monitoring data was developed to simulate wastewater quantity and quality variations within different scales in sewer system. A novel instantaneous unit pollutant-hydrograph modeling associated with simple wastewater electric conductivity monitoring data was proposed in the generator. The validated generation data of flow, COD, ammonia nitrogen, and phosphate were well-fitted with the full-scale monitoring data in residential areas, pump stations, and WWTPs. This generator could be used to predict and simulate the dynamic flow and wastewater quality variations at any sewer network-wide location. The dynamic wastewater quality and quantity along the whole sewer-shed could be simulated based on the modular flow generator to support the operation and management of pump stations and WWTPs. © 2024, The Authors. All rights reserved.

关键词： Ammonia

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Synergistic Effect of Novel Co-Modified Micro/Nano Geopolymers in a Photo-Pds System

SSRN

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SSRN 2022年

作者： Yang, Xiaohuan Ji, Zehua Wang, Kemeng Pei, Yuansheng State Key Laboratory of Water Environment Simulation Ministry of Education School of Environment Beijing Normal University Beijing100875 China The Key Laboratory of Water and Sediment Sciences Ministry of Education School of Environment Beijing Normal University Beijing100875 China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

Persulfate activation is an efficient advanced oxidation process for water treatment. However, many catalyst materials make their preparation methods and raw materials very complicated and expensive while pursuing high-efficiency catalytic effects. In this research, a novel Co-modified micro/nano geopolymer (Co-MNG) material was prepared from solid waste using a mechanochemical method. The whole preparation process of Co-MNG was simple and most of its raw materials were solid waste. In addition, it had few adverse effects on the environment during preparation and use and had an excellent effect on PDS activation. ESR (electron spin resonance) tests showed that the MNG materials with a Co loading of 4%wt could generate a variety of active radicals in a photo-PDS system, such as h+, ·OH, ·O2- and SO4-. Mechanistic investigation experiments showed that the material could effectively couple visible light and Co activation of PDS in the photo-PDS activation system to achieve synergistic degradation of pollutants in water. © 2022, The Authors. All rights reserved.

关键词： Magnetic moments

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Insights into in Situ Surface Reconstruction in Cobalt Perovskite Oxides for Enhanced Catalytic Activity

SSRN

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SSRN 2024年

作者： Jin, Yanyu Cheng, Hongjun Wang, Qibao Liu, Xiaoqing Mo, Shengpeng Zhou, Bin Peng, Yue Wang, Yu Si, Wenzhe Li, Junhua School of Environmental Science and Engineering Yancheng Institute of Technology Yancheng224051 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China School of Environment and Safety Engineering North University of China Taiyuan030051 China School of Chemical & Environmental Engineering China University of Mining and Technology Beijing100084 China

An depth understanding of the fundamental interactions between surface termination and catalytic activity is crucial to prompt the properties of functional perovskite materials. The elastic energy due to size mismatch and electrostatic attraction of the charged Sr dopant by positively charged oxygen vacancies induced inert A-site surface enrichment rearrangement for perovskites . Lower temperatures could reduce A-site enrichment, but it is difficult to form perovskite crystals. La0.8Sr0.2CoO3-δ (LSCO) as a model perovskite oxide was modified with additive urea to reduce the crystallization temperature, and suppress Sr segregation. The LSCO catalysts with 600°C annealing temperature (LSCO-600) exhibited a 19.4-fold reaction reactivity of toluene oxidation than that with 800°C annealing temperature (LSCO-800). Combined surface-sensitive and depth-resolved techniques for surface and sub-surface analysis, surface Sr enrichment was effectively suppressed due to decreased oxygen vacancy concentration and smaller electrostatic driving force. DFT calculations and in-situ DRIFTS spectra well reveal that tuning the surface composition/termination affects the intrinsic reactivity. The catalyst surface with lower Sr enrichment could easily adsorb toluene, cleave, and decompose benzene rings, thus contributing to toluene degradation to CO2. This work demonstrates a green and efficient way to control surface composition and termination at the atomic scale for higher catalytic activity. © 2024, The Authors. All rights reserved.

关键词： Perovskite

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Multivariate Optimization of Characteristic Parameters of Continuous-Flow System with a Front Buffer Tank for Industrial Reverse Osmosis Concentrate Treatment

SSRN

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SSRN 2023年

作者： Li, Shida Zeng, Fantang Zheng, Shaokui Fan, Zhongya Huang, Lu University of Waterloo Canada National Key Laboratory of Water Environmental Simulation and Pollution Control South China Institute of Environmental Sciences Ministry of Ecology and Environment No. 18 Ruihe Road Guangzhou510530 China School of Environment MOE Key Laboratory of Water and Sediment Sciences State Key Lab of Water Environment Simulation Beijing Normal University Beijing100875 China

Industrial reverse osmosis concentrate (ROC) was electrochemically oxidized using a continuous-flow system (CFS) with a front buffer tank. Multivariate optimization including Plackett-Burman design (PBD) and central composite design based on response surface method (CCD-RSM) was implemented to investigate the effects of characteristic (e.g., recirculation ratio (R value), ratio of buffer tank and electrolytic zone (RV value)) and routine (e.g., current density (i), inflow linear velocity (v) and electrode spacing (d)) parameters. R, v values and current density significantly influenced chemical oxygen demand [COD] and NH4+−N removal and effluent ACS level, while electrode spacing and RV value had negligible effects. High chloride content of industrial ROC facilitated the generation of ACS oxidants and subsequent mass transfer, low hydraulic retention time (HRT) of electrolytic cell improved the mass transfer efficiency, and high HRT of buffer tank prolonged the reaction between the pollutants and oxidants. The significance levels of COD removal, energy efficiency, effluent ACS level and toxic byproduct level CCD-RSM models were validated by statistical test results, including higher F value than critical effect value, lower P value than 0.05, low deviation between predicted and observed values, and normal distribution of calculated residuals. The highest pollutant removal was achieved at a high R value, a high current density and a low v value;the highest energy efficiency was achieved at a high R, a low current density and a high v value;the lowest effluent ACS and toxic byproduct levels were achieved at a low R value, a low current density and a high v value. Following the multivariate optimization, the optimum parameters were decided to be v = 1.2 cm h−1, i ≥ 8 mA cm−2, d ≥ 4, RV = 10−20 and R = 1 to achieve better effluent quality (i.e., lower effluent pollutant, ACS and toxic byproduct levels). © 2023, The Authors. All rights reserved.

关键词： Effluents

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Enhancing Biological Conversion of No to N2o by Utilizing Thermophiles Instead of Mesophiles

SSRN

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SSRN 2023年

作者： Li, Dan Sun, Zhuqiu Luo, Ga Lu, Lichao Zhang, Shaobo Xi, Jinying Environmental Simulation and Pollution Control State Key Joint Laboratory School of Environment Tsinghua University Beijing100084 China School of Petrochemical Engineering and Environment Zhejiang Ocean University Zhoushan316004 China Beijing Capital Sludge Disposal Technology Co. LTD Beijing100044 China

Recently, production of nitrous oxide (N2O) from biological denitrification of nitric oxide (NO) in flue gases have been reported and drawn more attention. Although the temperature of flue gas after desulfurization is usually 45-70℃, all previous studies carried out the denitrification of NO under mesophilic conditions. In this study, biological conversion of NO to N2O were performed under both mesophilic and thermophilic conditions (35–50 ℃). The results showed that temperature has a great impact on N2O production and a maximum conversion efficiency from NO to N2O of 82% was achieved at 45 ℃, which is higher than the reported conversion (24-71%). Both reductase (NOR) and nitrous oxide reductase (N2OR) activities were inhibited by increased temperature, while N2OR inhibition was more significant. The Biolog test results showed that microbial communities at 40 and 45 ℃ had greater carbon source metabolising capacities than those at 35 and 50 ℃. High-throughput sequencing showed that species richness and diversity decreased significantly with increased temperature. Additionally, redundancy analysis showed that the genus Enterococcus, Clostridium, Romboutsia, and Streptococcus were closely related to NO denitrification and N2O production. LEfSe analysis showed that Streptococcus was the key distinguished microorganism between the 45 ℃ sample and others. The results in this study demonstrated that biological production of N2O from NO in flue gas could be more efficient and promising under thermophilic condition (45 ℃). © 2023, The Authors. All rights reserved.

关键词： Nitric oxide

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