Assessment of persistent organochlorine pollutants in sediments from Lake Manzala, Egypt

被引：38

作者：

Barakat, Assem O. ^{[1
]}

Mostafa, Alaa ^{[1
]}

Wade, Terry L. ^{[2
]}

Sweet, Stephen T. ^{[2
]}

El Sayed, Nadia B. ^{[1
]}

机构：

[1] Univ Alexandria, Fac Sci, Dept Environm Sci, Alexandria 21511, Egypt

[2] Texas A&M Univ, Geochem & Environm Res Grp, College Stn, TX 77845 USA

来源：

MARINE POLLUTION BULLETIN | 2012年 / 64卷 / 08期

关键词：

Lake Manzala; Sediment; Organochlorines; Ecotoxicological risk; Distribution; ADJACENT COASTAL AREAS; ORGANIC POLLUTANTS; NILE-DELTA; POLYCHLORINATED-BIPHENYLS; ENVIRONMENTAL-IMPACT; TOXIC-SUBSTANCES; DANSHUI RIVER; CONTAMINATION; PESTICIDES; ESTUARINE;

D O I：

10.1016/j.marpolbul.2012.03.022

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) were determined in surface and core sediment samples collected from Manzala Lake, the largest of the Egyptian coastal lakes. Total concentrations of OCPs and Sigma 7 PCBs (ICES) in sediments ranged from 0.63 to 31.31 ng/g and 0.26 to 31.27 ng/g, respectively. Geographical distribution indicates that levels of contaminants were significantly higher in areas which are mainly influenced by municipal discharge, indicating significant sources of these compounds in urbanised areas. The composition of DDT and its metabolites suggest old input of DDT. The levels of contaminants in Manzala Lake were similar or lower than those observed in comparable areas worldwide. The profiles of Sigma OCPs and Sigma PCBs in a core from a site heavily impacted by sewage discharge have highest concentrations in the surface core section indicating recent inputs. Assessment of ecotoxicological risk indicated that sediments in two sites were likely to pose potential biological adverse impact. (c) 2012 Elsevier Ltd. All rights reserved.

引用

页码：1713 / 1720

页数：8

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