Soil and vegetables enrichment with heavy metals from geological sources in Gilgit, northern Pakistan

被引:316
作者
Khan, Sardar [1 ]
Rehman, Shafiqur [1 ]
Khan, Anwar Zeb [1 ]
Khan, M. Amjad [1 ]
Shah, M. Tahir [2 ]
机构
[1] Univ Peshawar, Dept Environm Sci, Peshawar 25120, Pakistan
[2] Univ Peshawar, Natl Ctr Excellence Geol, Peshawar 25120, Pakistan
关键词
Daily intake; Heavy metals; Health risk; Natural sources; Soil and vegetable contamination; Transfer factor; WASTE-WATER; HEALTH-RISKS; INDUSTRIAL-AREA; CADMIUM; LEAD; COPPER; CONTAMINATION; EXPOSURE; PB; ACCUMULATION;
D O I
10.1016/j.ecoenv.2010.08.016
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This study was conducted to investigate the concentrations of heavy metals in soil and vegetables, and human health risks through ingestion of contaminated vegetables. Soil and vegetable samples were collected from different locations in Gilgit, northern Pakistan, and analyzed for Cd, Cu, Ni, Pb and Zn. Plant transfer factors (PTF), daily intake of metals (DIM) and health risk index (HRI) were also calculated. The concentrations of Cd, Cu and Zn exceeded their respective permissible limits in soil samples. The highest concentrations of Cu, Ni, Pb and Zn were observed in the edible parts of Malva neglecta, Brassica oleracea, Mintha sylvestris and Brassica campestris, respectively. PTF values were lower for all the selected heavy metals, except for Cd. Furthermore, the HRI values were within the safe limit (<1) except for Pb; therefore, the health risks of metals through ingestion of vegetables were of great concern in the study area. (C) 2010 Elsevier Inc. All rights reserved.
引用
收藏
页码:1820 / 1827
页数:8
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