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[1]CHANG Hua-jin,CAO Guang-chao,CHEN Ke-long.Concentration and Assessment of Heavy Metals in Surface Sediment in the Lower Reaches of Huoshaogou, Xi’ning City[J].Research of Soil and Water Conservation,2013,20(05):247-250,256.

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Concentration and Assessment of Heavy Metals in Surface Sediment in the Lower Reaches of Huoshaogou, Xi’ning City

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 20 Number of periods: 2013 05 Page number: 247-250,256 Column: Public date: 2013-10-28

Title:: Concentration and Assessment of Heavy Metals in Surface Sediment in the Lower Reaches of Huoshaogou, Xi’ning City

Author(s):: CHANG Hua-jin^1,2, CAO Guang-chao², CHEN Ke-long^1,2; 1. School of Life and Geographical Sciences, Qinghai Normal University, Xi’ning 810008, China;
2. Key Laboratory of Tibetan Plateau Environment and Resources, Ministry of Education, Xi’ning 810008, China

Keywords:: heavy metals; surface sediment; Huoshaogou; Xi’ning City

CLC:: X820.4

DOI:: -

Abstract:: Heavy metals are the important pollutants in surface environment, and it has great significance to study their concentrations and contamination levels in terms of environmental protection and control. Concentrations of heavy metals including As, Cd, Pb, Ti, V, Cr, Mn, Ni, Cu and Zn in surface sediment in the lower reaches of Huoshaogou in Xi’ning City have been analyzed using ICP-MS, and contamination evaluation has been carried out using multiple parameters including the pollution coefficient, the geoaccumulation index and the potential ecological risk. Results show that concentrations of Cd, Cr and Zn in the sediments are average 0.39 μg/g, 183 μg/g and 135 μg/g, respectively, which are significant higher than the soil average levels of Qinghai Province, and concentrations of As and Pb are average 16.0 μg/g and 21.9 μg/g, respectively, which are near or somewhat higher than the soil average levels of Qinghai Province. The potential ecological risk evaluation indicates that Cd is the most important pollutant and belongs to middle-high ecological risk, and the other elements belong to low ecological risk. The ecological risk index of the ten heavy metals reaches up to 119.4 and belongs to middle ecological risk, which indicates that Huoshaogou lower reaches is suffering from obvious contamination. The results suggest that significant heavy metal pollution exists in the surface sediment in the Huoshaogou lower reaches, and sewage discharge with As, Pb, Cr, Zn, especially Cd into the river should be restricted.

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