| 城市河流沉积物镉污染的潜在生态风险评价——以重庆市清水溪为例 |
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| 引用本文： | 宋仕川,刘存东,庄红娟.城市河流沉积物镉污染的潜在生态风险评价——以重庆市清水溪为例[J].环境科学与管理,2009,34(7):18-21. |
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| 作者姓名： | 宋仕川 刘存东 庄红娟 |
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| 作者单位： | 1. 重庆市上桥中学,重庆,400030
2. 重庆师范大学,地理科学学院,重庆,400471 |
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| 基金项目： | 重庆市软科学计划项目(CSTC2008CE9095);;重庆市教委科技资助项目(KJ080803) |
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| 摘 要： | 针对目前河流污染问题的严重性，采用Hakanson潜在生态风险指数法，通过分析清水溪流域18个采样点沉积物中典型重金属污染物镉的含量，定量确定了清水溪沉积物中重金属镉的污染程度和潜在生态风险程度。结果表明：清水溪流域镉污染非常严重，上游比下游污染严重，而且在新桥到高滩岩段受到重金属镉的高强度污染，对周围环境存在着极高的镉生态风险。在清水溪干流采样点沉积物中镉的质量浓度范围在0．38～1．48mg·kg^-1之间，平均值0．85mg·kg^-1，各支流沉积物中镉的质量浓度范围为0．51～1．08mg·kg^-1。对于清水溪各支流镉的污染程度与潜在生态风险程度由高到低的排序为杨家沟〉金竹沟〉芭蕉沟〉关井沟〉石碾盘沟。
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| 关 键 词： | 河流沉积物 镉污染 生态风险 |
Pollution of Heavy Metals - Cadmium in the Sediments from Qingshui Stream and its Potential Ecological Risk Assessment |
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| Song Shichuang,Liu Cundong,Zhuang Hongjuan.Pollution of Heavy Metals - Cadmium in the Sediments from Qingshui Stream and its Potential Ecological Risk Assessment[J].Environmental Science and Management,2009,34(7):18-21. |
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| Authors: | Song Shichuang Liu Cundong Zhuang Hongjuan |
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| Institution: | 1.Shangqiao middle school of Chongqing;Chongqing 400030;China;2.Geography Science College of Chongqing Normal University;Chongqing 400471;China |
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| Abstract: | By using the Hakanson potential ecological risk index,pinpoint at the present rivers seriously polluted,anaylsed the heavy metal material-Cadmium in the dediments of 18 samples collected from streams and rivers.The results showed that Cadmium pollution is very serious in stream and rivers.The pollutants are more serious in the upstream than in the downstream.The section of Xinqiao to Gaotanyan received heavy metal cadmium,which has the extremely high ecology risk to the environment.The sample collected from... |
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| Keywords: | rivers sediment cadmium pollution ecology risk |
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