干旱区生态环境知识资源中心(Arid): Removal of urban-use insecticides in a large-scale constructed wetland

Arid

DOI	10.1016/j.envpol.2020.115586
	Removal of urban-use insecticides in a large-scale constructed wetland
	Cryder, Zachary; Wolf, Douglas; Carlan, Craig; Gan, Jay
通讯作者	Cryder, Z (corresponding author), Univ Calif Riverside, Dept Environm Sci, Riverside, CA 92521 USA.
来源期刊	ENVIRONMENTAL POLLUTION
ISSN	0269-7491
EISSN	1873-6424
出版年	2021
卷号	268
英文摘要	Water treatment and reuse initiatives are essential to combat declining water supplies in a changing climate, especially in arid and semi-arid regions. Pollution of water resources intensifies the search for strategies to provide water for potable and non-potable reuse that mitigates detrimental ecological and human health effects. Fipronil and synthetic pyrethroids are common urban-use insecticides that exert aquatic toxicity at trace levels and have been often found in urban surface streams. In this study, samples were collected from the 182 ha Prado Wetlands in Southern California for seven months to assess the occurrence of fipronil and its degradation products as well as pyrethroids (bifenthrin and cyfluthrin) in water, sediment, and plants in a 4.45 ha vegetated surface flow constructed wetland (CW). Concentration-based removal values and changes in mass flux were calculated to determine the efficacy of CW treatment. Observed water concentrations were further used to calculate toxic units for the invertebrates Hyalella azteca and Chironomus dilutus. Pesticide concentrations in water, sediment, and plant samples consistently decreased during passage through the CW at all time points. Removal values for fipronil desulfinyl, fipronil sulfide, fipronil, fipronil sulfone, bifenthrin, and cyfluthrin were 100%, 99.7-100%, 57.8-88.1%, 75.6-100%, 74.7-100%, and 36.6-82.2%, respectively, and there was a general net deposition of pesticides into CW compartments. Toxic unit values decreased in every instance for both aquatic invertebrates. Settling of contaminated particles, adsorption to sediment, plant uptake or adsorption, and subsequent degradation contributed to the effective removal of these urban-use insecticides, which highlights the potential of CWs for protecting urban water quality. (C) 2020 Elsevier Ltd. All rights reserved.
英文关键词	Fipronil Pyrethroids Constructed wetland Water treatment Invertebrate toxicity
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000600553000098
WOS关键词	PYRETHROID INSECTICIDES ; WASTE-WATER ; LAMBDA-CYHALOTHRIN ; DEGRADATION-PRODUCTS ; FIPRONIL ; TOXICITY ; IDENTIFICATION ; PESTICIDES ; STRATEGIES ; RUNOFF
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/2XILL650/347864
作者单位	[Cryder, Zachary; Wolf, Douglas; Gan, Jay] Univ Calif Riverside, Dept Environm Sci, Riverside, CA 92521 USA; [Carlan, Craig] Univ Calif Riverside, Dept Neurosci, Riverside, CA 92521 USA
推荐引用方式 GB/T 7714	Cryder, Zachary,Wolf, Douglas,Carlan, Craig,et al. Removal of urban-use insecticides in a large-scale constructed wetland[J],2021,268.
APA	Cryder, Zachary,Wolf, Douglas,Carlan, Craig,&Gan, Jay.(2021).Removal of urban-use insecticides in a large-scale constructed wetland.ENVIRONMENTAL POLLUTION,268.
MLA	Cryder, Zachary,et al."Removal of urban-use insecticides in a large-scale constructed wetland".ENVIRONMENTAL POLLUTION 268(2021).