Composition and distribution of organochlorine pesticide residues in surface sediments from the Wu-Shi River estuary, Taiwan

被引:178
作者
Doong, RA
Peng, CK
Sun, YC
Liao, PL
机构
[1] Natl Tsing Hua Univ, Dept Nucl Sci, Hsinchu 30013, Taiwan
[2] Natl Tsing Hua Univ, Nucl Sci & Technol Dev Ctr, Hsinchu 30013, Taiwan
关键词
organochlorine pesticides; Wu-Shi River estuary; sediments; distribution;
D O I
10.1016/S0025-326X(02)00102-9
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The contamination of organochlorine pesticides (OCPs) in sediments from the Wu-Shi River estuary was investigated to evaluate the pollution potentials and distribution of OCPs in central Taiwan. A total of 19 sediment samples were collected at five sampling stations along the River estuary. The concentrations of OCPs were in the range of 0.99-14.5 ng/g-dry weight (dw) for SigmaHCH (alpha-, beta-, gamma-, delta-HCH), 0.46-13.4 ng/g-dw for Sigmacyclodiene and 0.53-11.4 ng/g-dw for SigmaDDT (p,p'-DDD, p,p'-DDE, p,p'-DDT). The mean concentrations of SigmaHCH, Sigmacyclodiene and SigmaDDT were 3.79, 4.87 and 2.51 ng/g-dw, respectively. The total concentrations of OCPs correspond to 1.73-71.9 mug/g-OC when normalized to TOC contents. Among the organochlorine pesticides, endosulfan sulfate, betaHCH, and p,p'-DDD were the most dominant compounds in the sediments with the average concentrations of 1.97, 3.43 and 2.08 ng/g, respectively. Also, different contamination patterns among sampling seasons were observed. The measured concentrations of OCPs collected in spring were higher than those in autumn and winter. A linear relationship between sediment characteristics and OCP residues was also demonstrated. The results obtained in this study show that there still exist a variety of organochlorine pesticide residues in the sediments from the near shore of central Taiwan. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:246 / 253
页数:8
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