Article
Environmental Sciences
You Ma, Tian -Yu Li, Han Meng, Guo-Xiang Wang, Li-Min Zhang, Guo-Zheng Jia, Jie Ma, Yan Xiao, Wei-Hua Li, Wen-Ming Xie
Summary: This study investigated the adsorption of the antibiotic trimethoprim (TMP) by extracellular polymeric substances (EPS) in anaerobic activated sludge. The results showed that loosely-bound EPS had a positive effect on TMP adsorption, while tightly-bound EPS had a negative effect.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Lulu Xing, Jixian Yang, Bing-Jie Ni, Chao Yang, Chunyan Yuan, Ang Li
Summary: The generation and consumption mechanisms of TB-EPS and LB-EPS are revealed through mathematical modeling, providing a quantitative prediction for their changes. This study systematically investigates the impact of TB-EPS and LB-EPS on the flocculation and settling performance of activated sludge.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Green & Sustainable Science & Technology
Shu Wang, Nanqi Ren, Danhui Liang, Jifei Chang, Xin Wang, Jiaguo Yan, Xiang Cheng, Lili Dong, Nan Li
Summary: This study evaluated the changes of rFe, vFe, and RV after removing EPS, and found that TB-EPS played a crucial role in vivianite formation, contributing 28-51% of vivianite recovery and 34-55% of iron reduction. Electronic shuttle substances in TB-EPS enhanced the EET rate and efficiency between cells and Fe(III). Additionally, redox proteins were embedded in EPS, shortening the distance of electron hopping and accelerating vivianite recovery from wastewater.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Lulu Xing, Jixian Yang, Yueyan Zhang, Bing-Jie Ni, Chao Yang, Chunyan Yuan, Ang Li
Summary: This study systematically evaluated the influence of aeration on TB-EPS and LB-EPS through a mathematical model, and provided a method to reduce energy wastage during aeration.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Physical
Sihui Lu, Xin Li, Yanni Xi, Huinian Liu, Zhuang Zhang, Yicai Huang, Tanghuan Xie, Yanfen Liu, Bangyu Quan, Chang Zhang, Weihua Xu
Summary: This study explored the fate and mechanism of metal cations biosorption in the Desulfovibrio vulgaris system, finding that EPS (including TB-EPS and LB-EPS) played a greater role in adsorption compared to bacterial cells. The adsorption capacity of Pb2+ on EPS was greater than that of Cu2+ and Zn2+, and the adsorption process was dominated by complexation and electrostatic interaction. The findings provide valuable information on the interactions between Desulfovibrio vulgaris and its secreted EPS with metal cations.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Mengyu Fu, Xin Cheng, Jiarun Li, Shiqiang Chen, Wenwen Dou, Guangzhou Liu
Summary: The effects of soluble, loosely bound and tightly bound extracellular polymeric substances (S-EPS, LB-EPS, TB-EPS) from Desulfovibrio vulgaris on EH40 steel corrosion in 3.5 wt% NaCl solution were investigated. Results showed that the three types of EPS with different components have opposing effects on corrosion. S-EPS composed mainly of humic acids adhere to the steel surface, forming a passive film and inhibiting corrosion. However, proteins, the main components of LB-EPS and TB-EPS, accelerate corrosion. Especially for TB-EPS, the presence of active proteins promotes both anodic and cathodic reactions due to their binding and catalyzing abilities.
Article
Biophysics
Xinwei Shi, Qiujie Ling, Zhiling Jiang, Fengmei Pei, Meifen Xin, Weilan Tan, Xuan Chen, Kehui Liu, Jiangming Ma, Fangming Yu, Yi Li
Summary: The contributions of different types of extracellular polymeric substances (EPSs) secreted by Enterobacter sp. to the adsorption of Cd2+ and Pb2+ ions were analyzed. Adsorption equilibrium was reached in approximately 120 minutes with pH 6.0 being the optimal condition. The mechanism of adsorption involved spontaneous chemical processes and ion exchange, and the functional groups involved were mainly polysaccharides.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Engineering, Chemical
Rui Zhang, Zhong-yue Chang, Ling-ling Wang, Wei-xin Cheng, Rong-ping Chen, Lei Yu, Xu-hai Qiu, Jian-gang Han
Summary: The study evaluated the flocculation feasibilities of tobacco wastewater and livestock and poultry wastewater by the extracellular polymeric substances of Bacillus sp. The crude EPS showed larger floc sizes and higher removal efficiencies compared to chemical flocculants. Charge neutralization was dominant in LPW flocculation, while chemical reactions with Fe(III) played a role in TBW flocculation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Environmental Sciences
Xuan Gao, Kun Yang, Daohui Lin
Summary: The presence of extracellular polymeric substance (EPS) affects the interfacial interaction between titanium dioxide nanoparticles (nTiO(2)) and algae, promoting surface accumulation of nanoparticles on algal cells while limiting their internalization. The different endocytosis pathways for anatase nTiO(2) and rutile nTiO(2) entering algal cells may be attributed to their affinities to mediating receptors. EPS removal activates mediating pathways, facilitating more nanoparticle internalization.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Tianran Ye, Ao Yang, Yulai Wang, Na Song, Ping Wang, Huacheng Xu
Summary: This study investigates the response of extracellular polymeric substances (EPS) in Microcystis aeruginosa to microplastics (MPs). The results show that MPs can inhibit the growth of Microcystis, but enhance the secretion of EPS. The organic composition in EPS varies differently in response to MP exposure, leading to changes in the dominant components and potential ecotoxicological risk. These findings contribute to our understanding of the interaction between phytoplankton and MPs in aquatic environments.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Qing-Long Fu, Chun-Jie Zhong, Ting Qing, Zi-Yan Du, Cheng-Cheng-Li, Jun-Jie Fei, Willie J. G. M. Peijnenburg
Summary: The study found that the biological impacts of metallic Ag-NPs and silver sulfide nanparticles (Ag2S-NPs) depend on their form and are highly influenced by microbial EPS. Compared to Ag-NPs, Ag2S-NPs have less impact on plants, while Bacillus subtilis EPS significantly alleviates the phytotoxicity of Ag-NPs.
Article
Geochemistry & Geophysics
Ming Zhang, Caroline L. Peacock, Peng Cai, Ke-Qing Xiao, Chenchen Qu, Yichao Wu, Qiaoyun Huang
Summary: Recent research has shown that microbially-derived compounds, particularly extracellular polymeric substances (EPS), play a significant role in the soil organic matter pool. The interaction between EPS and soil minerals affects the sorption and selective retention of EPS constituents. The study investigates the EPS association pathways with ferrihydrite and their impact on the mobility and fate of microbially-derived organic matter in soil environments.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Engineering, Environmental
Xiaoying Liu, Jie Liu, Dongkun Deng, Renjie Li, Chao Guo, Jinxia Ma, Ming Chen
Summary: The study revealed a positive correlation between EPS content and sludge granulation, with increased protein concentration facilitating microbial aggregation and sludge granulation. Environmental factors affect the properties of EPS, with different types of sludge generating varying levels of EPS and protein concentrations.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Tao He, Jing-Qiu Hua, Rong-Ping Chen, Lei Yu
Summary: This study explored the adsorption capacity of Klebsiella oxytoca, a dye-degrading and EPS-producing strain, to methylene blue. The results showed that EPS played a significant role in the adsorption of MB dye.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Agricultural Engineering
Pengfei Wan, Ying Liu, Quandi Zhang, Li Jiang, Heping Chen, Wenzhou Lv
Summary: Candida Tropicalis was used to improve the dewaterability of activated sludge (AS) by degrading EPS in AS, resulting in a decrease in protein, polysaccharide, and hydrophilic amino acids in EPS. The yeast degraded macromolecular organics into smaller molecular ones and direct addition of yeast to AS was more effective in EPS degradation. Addition of 0.75 g/L of wet yeast cells and 24 h of aeration enhanced the dewaterability of AS with a reduction in CST and MLSS. After 30 days of operation, lab-scale continuous SBRs reduced CST and MLSS of AS. FTIR spectroscopy showed a decrease in hydrophilic functional groups. This study presents a new approach for in-situ reduction of AS in wastewater treatment plants.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Fangxu Jia, Qing Yang, Xiuhong Liu, Xiyao Li, Baikun Li, Liang Zhang, Yongzhen Peng
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2017)
Article
Engineering, Environmental
Wei Xing, Yan Wang, Tianyu Hao, Zhenglan He, Fangxu Jia, Hong Yao
Article
Agricultural Engineering
Lijun Yang, Wei Li, Weiwei Cai, Wei Xing, Fangxu Jia, Hong Yao
BIORESOURCE TECHNOLOGY
(2020)
Article
Environmental Sciences
Weiwei Cai, Xingcheng Zhao, Hui Wang, Fangxu Jia, Hong Yao
ENVIRONMENTAL RESEARCH
(2020)
Article
Environmental Sciences
Wei Xing, Zhenglan He, Yan Wang, Weiwei Cai, Fangxu Jia, Hong Yao
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Engineering, Environmental
Lushen Zuo, Hong Yao, Hui Chen, Huayu Li, Fangxu Jia, Jianhua Guo
Summary: The addition of glycine betaine (GB) was shown to alleviate the inhibitory effects of salinity on both ammonium-oxidizing bacteria (AOB) and anammox bacteria, thereby improving nitrogen removal performance in a one-stage PN/A system. A concentration of 1 mM GB was found to be optimal in terms of both effectiveness and cost. GB addition was identified as a feasible and effective strategy to counteract the adverse effects of salinity on the PN/A process.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Environmental Sciences
Xu Zhang, Weiwei Cai, Shenlong Zhao, Xinyang Li, Fangxu Jia, Fujun Ma, Hong Yao
Summary: The study explored the use of antibiotic mycelial residues to prepare nitrogen-doped porous carbons for supercapacitor electrodes. The optimized carbons showed excellent electrochemical performance and a reduction in antibiotic resistance genes during the conversion process.
ENVIRONMENTAL RESEARCH
(2021)
Article
Environmental Sciences
Lushen Zuo, Hong Yao, Huayu Li, Fangxu Jia, Wei Wei, Yiwen Liu, Bing-Jie Ni, Xueming Chen
Summary: The addition of 1 mM GB and a SRT of 50 days are sufficient to protect AOB and anammox bacteria under high salinity conditions, reducing the time needed to recover treatment performance from salt inhibition by 35%-40%.
Article
Engineering, Environmental
Fangxu Jia, Yongzhen Peng, Jianwei Li, Xiyao Li, Hong Yao
Summary: The study utilized PICRUSt to predict metagenomic potentials and characterize the microbial community structure in anammox aggregates, revealing Candidatus Brocadia as the dominant anammox genus. It also explored the aggregation pathway of anammox bacteria, highlighting their strong motility, attachment capability, EPS synthesis, and c-di-GMP synthesis in maintaining a stable structure. These findings contribute to enhancing the stability of anammox processes through genetic-level understanding of microbial aggregation mechanism.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Environmental Sciences
Yao Chen, Fangxu Jia, Yingjie Liu, Wanrou Yu, Weiwei Cai, Xiaofan Zhang, Haodong He, Hong Yao
Summary: This study compared the effects of different Fe stress on anammox process, finding that high Fe(II) concentrations may lead to precipitate formation while continuous addition of 30 mg/L-Fe(III) can damage EPS composition. Moreover, addition of Fe(II) could induce nitrate reduction, and OM27_clade and norank_f__Burkholderiaceae may play important roles in this process.
Article
Environmental Sciences
Liru Fan, Hong Yao, Shihai Deng, Fangxu Jia, Weiwei Cai, Zhifeng Hu, Jianhua Guo, Huan Li
Summary: The SF-A/OA/O process has demonstrated superior performance in full-scale coking wastewater treatment compared to the A/O/O process, showing efficient removal of COD, NH4+-N, TN, phenols, and cyanide. The abundance and structure of the microbial community may be key factors contributing to the strong stability of the SF-A/OA/O system.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Fangxu Jia, Chenyu Liu, Xingcheng Zhao, Jiayi Chen, Ziyan Zhang, Hong Yao
Summary: The study evaluates the feasibility of using pH, conductivity, and oxidation reduction potential profiles for monitoring and controlling the anammox process in synthetic wastewater treatment. The results show that these parameter profiles have high accuracy and reproducibility in indicating the endpoint of the anammox reaction. Positive correlations are found between TN removal and Delta pH, Delta Cond, and Delta ORP. The slope of the conductivity curve is significantly linearly correlated with the specific anammox activity, making it a useful immediate feedback signal for inhibiting anammox activity.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Lushen Zuo, Hong Yao, Huayu Li, Liru Fan, Fangxu Jia
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2020)
Article
Agricultural Engineering
Wenlong Liu, Yongzhen Peng, Bin Ma, Linna Ma, Fangxu Jia, Xiyao Li
BIORESOURCE TECHNOLOGY
(2017)