[1]常华进,曹广超,陈克龙.西宁火烧沟下游表层泥质沉积物中重金属含量及评价[J].水土保持研究,2013,20(05):247-250,256.
　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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西宁火烧沟下游表层泥质沉积物中重金属含量及评价

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 20 期数: 2013年05期 页码: 247-250,256 栏目: 出版日期: 2013-10-28
Title:
Concentration and Assessment of Heavy Metals in Surface Sediment in the Lower Reaches of Huoshaogou, Xi’ning City
作者:
常华进1,2, 曹广超2, 陈克龙1,2
1. 青海师范大学 生命与地理科学学院, 西宁 810008;
2. 青藏高原环境与资源教育部重点实验室, 西宁 810008
Author(s):
CHANG Hua-jin1,2, CAO Guang-chao2, CHEN Ke-long1,2
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
关键词:
重金属; 泥质沉积物; 火烧沟; 西宁市
Keywords:
heavy metals; surface sediment; Huoshaogou; Xi’ning City
分类号:
X820.4
摘要:
重金属元素是一类重要的污染物，研究其在表生环境中的含量及污染程度，对于环境保护和治理具有重要意义。利用ICP-MS测试方法对青海省西宁市火烧沟下游城区段表层泥质沉积物中As，Cd，Pb，Ti，V，Cr，Mn，Ni，Cu，Zn共10种重金属元素的含量进行了分析测定，并利用污染系数、地累积指数和潜在生态危害指数等指标评估了其污染程度。结果表明：火烧沟下游表层泥质沉积物中Cd，Cr和Zn含量（平均值分别为0.39 μg/g，183 μg/g和135 μg/g）明显高于青海省土壤平均值，As和Pb含量（平均值分别为16.0 μg/g和21.9 μg/g）接近或略高于青海省土壤平均值；Cd污染明显，达到了中等—较高生态危害风险级别，其他元素为低生态危害风险级别；多风险因子指数（119.4）显示已达到中等生态风险级别。火烧沟下游已出现较明显的重金属污染，应控制As，Pb，Cr，Zn，尤其是Cd向火烧沟中的排放。
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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备注/Memo

收稿日期:2013-01-21;改回日期:2013-03-01。
基金项目:青海师范大学科研创新计划项目；国家自然科学基金（41002011）
作者简介:常华进(1980-),男,湖北钟祥人,博士,教授,硕士生导师,研究方向为元素和同位素地球化学。E-mail:changhj@163.com

更新日期/Last Update: 1900-01-01