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| Content and risk assessment of lead in four species of shellfish in Jiangsu coastal area |
| Received:September 08, 2015 |
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| KeyWord:Jiangsu coastal area;bivalve;lead;content;risk assessment |
| Author Name | Affiliation | E-mail | | QI Yuan-ye | College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China | | | WANG Li-bao | Jiangsu Institute of Oceanography & Marine Fisheries, Nantong 226007, China | | | WAN Xi-he | Jiangsu Institute of Oceanography & Marine Fisheries, Nantong 226007, China | wxh1708@163.com | | LING Yun | Jiangsu Institute of Oceanography & Marine Fisheries, Nantong 226007, China | | | QIAO Yi | Jiangsu Institute of Oceanography & Marine Fisheries, Nantong 226007, China | | | WANG Chang-hai | College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China | chwang@njau.edu.cn |
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| Abstract: |
| Lead(Pb) accumulation in bivalves poses a potential risk to human health. In this investigation, Meretrix meretrix, Cyclina sineusis, Ruditapes variegate and Mactra venerformis were collected from September 2012 to August 2013, and March 2015 from Jiangsu coastal area, to evaluate Pb risk to local inhabitants through food chain. Concentrations of Pb in bivalves were determined using atomic absorption spectrophotometry(AAS). Point estimate and target hazard quotient were employed to assess the health risk of Pb. The concentrations of Pb in four species of bivalves ranged from 0.05 mg·kg-1 to 0.56 mg·kg-1, with the mean concentration of 0.23 mg·kg-1, lower than the limits(1.5 mg·kg-1) of national standard(GB 2762-2012) and of industrial standard(1.0 mg·kg-1, NY 5073-2006) set in China. The highest concentrations of Pb in four species of bivalves generally occurred in summer, which was 0.77 mg·kg-1, 0.12 mg·kg-1, 0.23 mg·kg-1 and 0.61 mg·kg-1 for M. meretrix, C. sineusis, M. venerformis and R. variegata, respectively. The seasonal fluctuation of Pb concentrations was obvious in M. meretrix and M. venerformis, but not in C. sineusis and R. variegata. The Pb concentrations had spatial distribution, with high Pb(0.44 mg·kg-1) occurred in station 3, followed by station 4(0.32 mg·kg-1), and low in station 11(0.21 mg·kg-1). There was no significant difference in Pb concentrations among other stations, ranging from 0.21 mg·kg-1 to 0.30 mg·kg-1. THQ values of local economical shellfish did not exceed 1 under the normal consumption level of residents in Jiangsu coastal area. The exposure to Pb in four species of bivalves from Jiangsu coastal area would not endanger human health in normal consumption. |
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