Significance of antifouling paint flakes to the distribution of   dichlorodiphenyltrichloroethanes (DDTs) in estuarine sediment

doi:10.1016/j.envpol.2015.12.012

CORC > 北京大学 > 城市与环境学院

	Significance of antifouling paint flakes to the distribution of dichlorodiphenyltrichloroethanes (DDTs) in estuarine sediment
	Wu, Chen-Chou ; Sao, Lian-Jun ; Tao, Shu ; Zeng, Eddy Y.
刊名	ENVIRONMENTAL POLLUTION
	2016
关键词	Paint flake Estuarine sediment Dichlorodiphenyltrichloroethane Hot spot Desorption POLYCYCLIC AROMATIC-HYDROCARBONS ORGANIC POLLUTANTS SIZE FRACTIONS SOUTH CHINA INPUTS CONTAMINATION EQUILIBRIUM ENVIRONMENT BIOCIDES SORPTION
DOI	10.1016/j.envpol.2015.12.012
英文摘要	Recently published literature indicated that dichlorodiphenyltrichloroethane (DDT)-containing antifouling paint flakes were heterogeneously distributed within estuarine sediments. However, the significance of antifouling paint flakes in the fate and transport of DDT compounds and other organic pollutants in estuarine sediment is yet to be adequately addressed. To fill this knowledge gap, estuarine sediment and paint flakes from cabin and boat surfaces were collected from a fishery base in Guangdong Province of South China and analyzed for DDT compounds. Coarse fractioned samples collected from the vicinity of boat maintenance facilities contained appreciable amounts of colorful particles, which were identified as paint flakes by Fourier transform infrared spectroscopy. The highest concentrations of DDXs (sum of DDTs and its metabolites) occurred in the heavy-density (>1.7 g cm(-3)) fraction of coarse-size (200-2000 mu m) sediments from near the boat maintenance facilities, suggesting the importance of paint flakes in the distribution pattern of "hot spots" in estuarine sediment. Moreover, the desorption rates of DDT compounds from paint flakes and the heavy-density fraction of coarse-size sediment were both extremely slow. Apparently, unevenly distributed paint flakes in sediment can artificially inflate the sorption capacity of heavy-density sediment for DDT compounds, and therefore can substantially change the environmental fate and behavior of hydrophobic organic chemicals in estuarine sediment. Finally, commonly used source diagnostic indices of DDT compounds were mostly grain-size and density dependent in sediment, as a result of the occurrence of paint flakes, which may strongly compromise the outcome of any source diagnostics efforts. (C) 2015 Elsevier Ltd. All rights reserved.; Natural Science Foundation of Guangdong Province, China [S2012020011076]; National Natural Science Foundation of China [41390240, 21277144]; SCI(E); EI; PubMed; ARTICLE; eddyzeng@jnu.edu.cn; 253-260; 210
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/435471]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Wu, Chen-Chou,Sao, Lian-Jun,Tao, Shu,et al. Significance of antifouling paint flakes to the distribution of dichlorodiphenyltrichloroethanes (DDTs) in estuarine sediment[J]. ENVIRONMENTAL POLLUTION,2016.
APA	Wu, Chen-Chou,Sao, Lian-Jun,Tao, Shu,&Zeng, Eddy Y..(2016).Significance of antifouling paint flakes to the distribution of dichlorodiphenyltrichloroethanes (DDTs) in estuarine sediment.ENVIRONMENTAL POLLUTION.
MLA	Wu, Chen-Chou,et al."Significance of antifouling paint flakes to the distribution of dichlorodiphenyltrichloroethanes (DDTs) in estuarine sediment".ENVIRONMENTAL POLLUTION (2016).