干旱区生态环境知识资源中心(Arid): Effects of suspended sediment on POCIS sampling rates

Arid

DOI	10.1016/j.chemosphere.2019.124972
	Effects of suspended sediment on POCIS sampling rates
	Djomte, Valerie Toteu 1; Chen, Sunmao 2; Chambliss, C. Kevin 1
通讯作者	Chambliss, C. Kevin
来源期刊	CHEMOSPHERE
ISSN	0045-6535
EISSN	1879-1298
出版年	2020
卷号	241
英文摘要	Effects of chemical uptake onto polar organic chemical integrative samplers (POCIS) exposed to total suspended solid (TSS) sediment concentrations of 0 and 3600 ppm were investigated for 12 pesticides at constant concentration, temperature, and flow velocity. The effects of sediment exposure on POCIS uptake were negligible for compounds with polyethersulfone-water partition coefficients greater than three (i.e., log K-PESW > 3). However, significant effects were observed for 3 of 12 compounds tested, and the maximum effect was an approximate 4-fold increase in sampling rate for the sediment experiment relative to the control. Effects of sediment on the pesticide distribution between polyethersulfone (PES) membranes and Oasis HLB sorbent were also investigated. The fraction of pesticide accumulated on PES membranes was relatively low for most compounds and ranged from 0 to 33%. In contrast, four compounds with higher affinity for PES accumulated preferentially on the membranes (fraction ranging from 64 to 96%), suggesting that a sampling rate derived from the additive contribution of membrane extraction and the more typical extraction of analytes from HLB sorbent would improve the sensitivity of sampling rate estimations for these compounds. However, for these same compounds, the combined sampling rate, R-s (HLB + PES), was considerably more susceptible to a sediment effect than the traditional sampling rate determination, relying solely on extraction from HLB sorbent. (C) 2019 Elsevier Ltd. All rights reserved.
英文关键词	Passive sampler Organic contaminant Pesticides Sampling rate PES membrane Sediment
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000509791600021
WOS关键词	SETTLING VELOCITY ; PESTICIDES ; PHARMACEUTICALS ; CALIBRATION ; EXTRACTION ; MEMBRANES
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314252
作者单位	1.Baylor Univ, Dept Chemist & Biochem, Waco, TX 76798 USA; 2.Syngenta Crop Protect LLC, Greensboro, NC USA
推荐引用方式 GB/T 7714	Djomte, Valerie Toteu,Chen, Sunmao,Chambliss, C. Kevin. Effects of suspended sediment on POCIS sampling rates[J],2020,241.
APA	Djomte, Valerie Toteu,Chen, Sunmao,&Chambliss, C. Kevin.(2020).Effects of suspended sediment on POCIS sampling rates.CHEMOSPHERE,241.
MLA	Djomte, Valerie Toteu,et al."Effects of suspended sediment on POCIS sampling rates".CHEMOSPHERE 241(2020).