TY - JOUR
T1 - Effects of polystyrene nanoplastics on extracellular polymeric substance composition of activated sludge
T2 - The role of surface functional groups
AU - Qian, Jin
AU - He, Xixian
AU - Wang, Peifang
AU - Xu, Bin
AU - Li, Kun
AU - Lu, Bianhe
AU - Jin, Wen
AU - Tang, Sijing
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/6/15
Y1 - 2021/6/15
N2 - Here we investigated the acute effects (12 h exposure) of three polystyrene nanoplastics (PS NPs, including PS, PS−COOH and PS−NH2) on extracellular polymeric substance (EPS) composition of activated sludge. Three PS NPs exhibited the significant inhibition in total EPS and protein (PRO) production. The functional groups involved in the interactions between PS NPs and EPS were C-(C, H), and those between PS-NH2 NPs and EPS were C[dbnd]O and O–C–O. In addition, the dewaterability of activated sludge were optimized by three PS NPs, especially PS-NH2 NPs. Three PS NPs caused nonnegligible cellular oxidative stress and cell membrane damage in activated sludge (PS NPs exposure concentration: 100 mg/L). Among them, the cell membrane damage caused by PS-NH2 was the most significant. Overall, the degree of influence on EPS and cytotoxicity of activated sludge varies with the surface functional groups of PS NPs.
AB - Here we investigated the acute effects (12 h exposure) of three polystyrene nanoplastics (PS NPs, including PS, PS−COOH and PS−NH2) on extracellular polymeric substance (EPS) composition of activated sludge. Three PS NPs exhibited the significant inhibition in total EPS and protein (PRO) production. The functional groups involved in the interactions between PS NPs and EPS were C-(C, H), and those between PS-NH2 NPs and EPS were C[dbnd]O and O–C–O. In addition, the dewaterability of activated sludge were optimized by three PS NPs, especially PS-NH2 NPs. Three PS NPs caused nonnegligible cellular oxidative stress and cell membrane damage in activated sludge (PS NPs exposure concentration: 100 mg/L). Among them, the cell membrane damage caused by PS-NH2 was the most significant. Overall, the degree of influence on EPS and cytotoxicity of activated sludge varies with the surface functional groups of PS NPs.
KW - Activated sludge
KW - Extracellular polymeric substance
KW - Polystyrene nanoplastics
KW - Protein secondary structure
KW - Surface functional groups
UR - http://www.scopus.com/inward/record.url?scp=85102881245&partnerID=8YFLogxK
U2 - 10.1016/j.envpol.2021.116904
DO - 10.1016/j.envpol.2021.116904
M3 - 文章
C2 - 33765504
AN - SCOPUS:85102881245
SN - 0269-7491
VL - 279
JO - Environmental Pollution
JF - Environmental Pollution
M1 - 116904
ER -