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New insight into the effect of short-term exposure to polystyrene nanoparticles on activated sludge performance

文献类型：期刊论文

作者Li, Hanxiang1; Xu, Shanshan1; Wang, Shuai1; Yang, Jixiang1,2; Yan, Peng1; Chen, Youpeng1; Guo, Jinsong1; Fang, Fang1
刊名JOURNAL OF WATER PROCESS ENGINEERING
出版日期2020-12-01
卷号38页码:9
关键词Nanoparticle Activated sludge Activity Sedimentation
ISSN号2214-7144
DOI10.1016/j.jwpe.2020.101559
通讯作者Fang, Fang(fangfangcq@cqu.edu.cn)
英文摘要Microplastics have become a global concern because of their adverse effects on ecosystems. Although wastewater treatment plants (WWTPs) are considered a potential source of microplastics in the environment, the effect of polystyrene nanoparticles on activated sludge performance is not clear. In this study, the effect of short-term exposure to polystyrene nanoparticles (PS-NPs) on activated sludge activity and sedimentation was investigated, and the mechanism behind the effect was analysed. At 5 g/L, the PS-NPs could be adsorbed completely by activated sludge (2.8 g VSS/L) and could be transferred from the aqueous phase to the sludge phase in a short period. At a low concentration (0.1 g/L), the PS-NPs significantly inhibited the endogenous respiration in the sludge by causing bacterial death and affecting the mass transfer in the sludge. Changes in the zeta potential of the sludge surface and in the components of extracellular polymeric substance (EPS) resulted in low sludge aggregation. PS-NPs also caused sludge disintegration, so that when the PS-NP concentration reached 5 g/L, the sludge sedimentation decreased by approximately 50%. Short-term PS-NP exposure has a significant effect on the activity and sedimentation of activated sludge, which could affect the WWTP effluent quality. The findings of this study provide new insight for evaluating the potential risks posed by nanoplastics in WWTPs.
资助项目National Natural Science Foundation of China[51878091] ; National Key Research and Development Program of China[2019YFD1100501] ; Chongqing Science and Technology Commission[cstc2018jcyjAX0610]
WOS研究方向Engineering ; Water Resources
语种英语
WOS记录号WOS:000598142400011
出版者ELSEVIER
源URL[http://119.78.100.138/handle/2HOD01W0/12661]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Fang, Fang
作者单位1.Chongqing Univ, Coll Environm & Ecol, 174 Shazhengjie, Chongqing 400045, Peoples R China
2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing, Peoples R China
推荐引用方式
GB/T 7714		 Li, Hanxiang,Xu, Shanshan,Wang, Shuai,et al. New insight into the effect of short-term exposure to polystyrene nanoparticles on activated sludge performance[J]. JOURNAL OF WATER PROCESS ENGINEERING,2020,38:9.
APA Li, Hanxiang.,Xu, Shanshan.,Wang, Shuai.,Yang, Jixiang.,Yan, Peng.,...&Fang, Fang.(2020).New insight into the effect of short-term exposure to polystyrene nanoparticles on activated sludge performance.JOURNAL OF WATER PROCESS ENGINEERING,38,9.
MLA Li, Hanxiang,et al."New insight into the effect of short-term exposure to polystyrene nanoparticles on activated sludge performance".JOURNAL OF WATER PROCESS ENGINEERING 38(2020):9.

入库方式： OAI收割

来源：重庆绿色智能技术研究院

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