NDLI: Water–gas exchange of organochlorine pesticides at Lake Chaohu, a large Chinese lake

Content Provider	Springer Nature Link
Author	Ouyang, Hui Ling He, Wei Qin, Ning Kong, Xiang Zhen Liu, Wen Xiu He, Qi Shuang Yang, Chen Jiang, Yu Jiao Wang, Qing Mei Yang, Bin Xu, Fu Liu
Copyright Year	2012
Abstract	Organochlorine pesticides (OCPs), a potential threat to ecosystems and human health, are still widely residual in the environment. The residual levels of OCPs in the water and gas phase were monitored in Lake Chaohu, a large Chinese lake, from March 2010 to February 2011. Nineteen types of OCPs were detected in the water with a total concentration of 7.27 ± 3.32 ng/l. Aldrin, DDTs and HCHs were the major OCPs in the water, accounting for 38.3 %, 28.9 % and 23.6 % of the total, respectively. The highest mean concentration (12.32 ng/l) in the water was found in September, while the lowest (1.74 ng/l) was found in November. Twenty types of gaseous OCPs were detected in the atmosphere with a total concentration of 542.0 ± 636.5 pg/m$^{3}$. Endosulfan, DDTs and chlordane were the major gaseous OCPs in the atmosphere, accounting for 48.9 %, 22.5 % and 14.4 % of the total, respectively. The mean concentration of gaseous OCPs was significantly higher in summer than in winter. o,p′-DDE was the main metabolite of DDT in both the water and gas phase. Of the HCHs, 52.3 % existed as β-HCH in the water, while α-HCH (37.9 %) and γ-HCH (30.9 %) were dominant isomers in the gas phase. The average fluxes were −21.11, −3.30, −152.41, −35.50 and −1314.15 ng/(m$^{2}$ day) for α-HCH, γ-HCH, HCB, DDT and DDE, respectively. The water–gas exchanges of the five types of OCPs indicate that water was the main potential source of gaseous OCPs in the atmosphere. A sensitivity analysis indicated that the water-gas flux of α-HCH, γ-HCH and DDT is more vulnerable than that of HCB and DDE to the variation of the parameters. The possible source of the HCHs in the water was from the historical usage of lindane; however, that in the air was mainly from the recent usage of lindane. The technical DDT and dicofol might be the source of DDTs in the water and air.
Starting Page	2020
Ending Page	2032
Page Count	13
File Format	PDF
ISSN	09441344
Journal	Environmental Science and Pollution Research
Volume Number	20
Issue Number	4
e-ISSN	16147499
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-12-13
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	OCPs Water Gas phase Water–gas exchange Lake Chaohu Environment Environmental Chemistry Ecotoxicology Environmental Health Atmospheric Protection/Air Quality Control/Air Pollution Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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