RCEES OpenIR  > 环境化学与生态毒理学国家重点实验室
Aggregation kinetics of different surface-modified polystyrene nanoparticles in monovalent and divalent electrolytes
Yu, Sujuan; Shen, Mohai1; Li, Shasha; Fu, Yueju2; Zhang, Dan2; Liu, Huayi2; Liu, Jingfu
2019-12-01
Source PublicationENVIRONMENTAL POLLUTION
ISSN0269-7491
Volume255Pages:-
AbstractThe intentional production and degradation of plastic debris may result in the formation of nanoplastics. Currently, the scarce information on the environmental behaviors of nanoplastics hinders accurate assessment of their potential risks. Herein, the aggregation kinetics of different surface-modified polystyrene nanoparticles in monovalent and divalent electrolytes was investigated to shed some light on the fate of nanoplastics in the aquatic environment. Three monodisperse nanoparticles including unmodified nanoparticles (PS-Bare), carboxylated nanoparticles (PS-COON) and amino modified nanoparticles (PS-NH2), as well as one polydisperse nanoparticles that formed by laser ablation of polystyrene films (PS-Laser) were used as models to understand the effects of surface groups and morphology. Results showed that aggregation kinetics of negatively charged PS-Bare and PS-COOH obeyed the DLVO theory in NaCl and CaCl2 solutions. The presence of Suwannee river natural organic matters (SRNOM) suppressed the aggregation of PS-Bare and PS-COOH in monovalent electrolytes by steric hindrance. However, in divalent electrolytes, their stability was enhanced at low concentrations of SRNOM (below 5 mg C L-1), while became worse at high concentrations of SRNOM (above 5 mg C L-1) due to the interparticle bridging effect caused by Ca2+ and carboxyl groups of SRNOM. The cation bridging effect was also observed for PS-laser in the presence of high concentrations of divalent electrolytes and SRNOM. The adsorption of SRNOM could neutralize or even reverse surface charges of positively charged PS-NH2 at high concentrations, thus enhanced or inhibited the aggregation of PS-NH2. No synergistic effect of Ca2+ and SRNOM was observed on the aggregation of PS-NH2, probably due to the steric repulsion imparted by the surface modification. Our results highlight that surface charge and surface modification significantly influence aggregation behaviors of nanoplastics in aquatic systems. (C) 2019 Elsevier Ltd. All rights reserved.
Department环境化学与生态毒理学国家重点实验室
KeywordNanoplastics Aggregation Suwannee river natural organic matters Critical coagulation concentration Cation bridging
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/42505
Collection环境化学与生态毒理学国家重点实验室
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, POB 2871, Beijing 100085, Peoples R China
2.Henan Normal Univ, Key Lab Yellow River & Huai River Water Environm, Henan Key Lab Environm Pollut Control, Sch Environm,Minist Educ, Xinxiang 453007, Henan, Peoples R China
3.Hebei Univ, Coll Phys Sci & Technol, Hebei Prov Key Lab Optoelect Informat Mat, Baoding 071002, Hebei, Peoples R China
Recommended Citation
GB/T 7714
Yu, Sujuan,Shen, Mohai,Li, Shasha,et al. Aggregation kinetics of different surface-modified polystyrene nanoparticles in monovalent and divalent electrolytes[J]. ENVIRONMENTAL POLLUTION,2019,255:-.
APA Yu, Sujuan.,Shen, Mohai.,Li, Shasha.,Fu, Yueju.,Zhang, Dan.,...&Liu, Jingfu.(2019).Aggregation kinetics of different surface-modified polystyrene nanoparticles in monovalent and divalent electrolytes.ENVIRONMENTAL POLLUTION,255,-.
MLA Yu, Sujuan,et al."Aggregation kinetics of different surface-modified polystyrene nanoparticles in monovalent and divalent electrolytes".ENVIRONMENTAL POLLUTION 255(2019):-.
Files in This Item: Download All
File Name/Size DocType Version Access License
Aggregation kinetics(2768KB)期刊论文出版稿开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Yu, Sujuan]'s Articles
[Shen, Mohai]'s Articles
[Li, Shasha]'s Articles
Baidu academic
Similar articles in Baidu academic
[Yu, Sujuan]'s Articles
[Shen, Mohai]'s Articles
[Li, Shasha]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Yu, Sujuan]'s Articles
[Shen, Mohai]'s Articles
[Li, Shasha]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Aggregation kinetics of different surface-modified polystyrene nanoparticles in monovalent and divalent electrolytes.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.