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

doi:10.1016/j.jwpe.2020.101559

	New insight into the effect of short-term exposure to polystyrene nanoparticles on activated sludge performance
	Li, Hanxiang 1; Xu, Shanshan 1; Wang, Shuai 1; Yang, Jixiang 1,2; Yan, Peng 1; Chen, Youpeng 1; Guo, Jinsong 1; Fang, Fang 1
刊名	JOURNAL OF WATER PROCESS ENGINEERING
	2020-12-01
卷号	38 页码:9
关键词	Nanoparticle Activated sludge Activity Sedimentation
ISSN号	2214-7144
DOI	10.1016/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
出版者	ELSEVIER
WOS记录号	WOS:000598142400011
内容类型	期刊论文
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.