Environmental pathway and risk assessment studies of the Musi River's heavy metal contamination - A case study

被引:20
作者
Sekhar, C [1 ]
Chary, NS
Karnala, CT
Shanker
Frank, H
机构
[1] Def Res & Dev Org, Def Met Res Lab, Analyt Chem Grp, Div Analyt Chem, Hyderabad 500058, Andhra Pradesh, India
[2] Indian Inst Chem Technol, Analyt Chem & Environm Sci Div, Hyderabad 500007, Andhra Pradesh, India
[3] Univ Bayreuth, D-95440 Bayreuth, Germany
来源
HUMAN AND ECOLOGICAL RISK ASSESSMENT | 2005年 / 11卷 / 06期
关键词
Musi River; heavy metals; food chain; human exposure; remediation;
D O I
10.1080/10807030500278594
中图分类号
X176 [生物多样性保护];
学科分类号
090705 ;
摘要
The Musi River, in Hyderabad, the capital city of Andhra Pradesh state in India, is relatively dry for most of the year except for the four monsoon months when 700-800 mm of rain falls. Throughout the year, sewage, industrial, and hospital waste is released into the fiver. In the present work the Musi River from Amberpet Bridge to Nallacheruvu (8 km stretch) was assessed and monitored for heavy metal contamination attributable to sewage and industrial effluents. Twelve locations were assessed for Zn, Cr, Cu, Ni, Co, As, Hg, Cd, and Pb in soils, waters, forage grass, milk, and vegetables. A sequential extraction scheme revealed that high levels of Zn, Cr, and Cu were associated with labile fractions, making them more mobile and phytoavailable. Human risk was assessed in people exposed to pollution by analyzing metals concentrations in venous blood and urine. Results showed high amounts of Pb, Zn, Cr, and Ni compared to permissible limits, attributable to the consumption of contaminated food. Metals concentrations were monitored systematically to assess risks and support management decisions to help curtail the possible entry of metals into human food chains. An assessment was also made of a possible analysis of a remediation technology for lead-contaminated soils and water.
引用
收藏
页码:1217 / 1235
页数:19
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