| 罗明科,田学达,余辉,杨超,牛远,刘鹏,牛勇.长江中游湖泊柱状沉积物的垂直污染特征[J].农业环境科学学报,2016,35(5):955-962. |
| 长江中游湖泊柱状沉积物的垂直污染特征 |
| Vertical pollution characteristics of sediments from lakes in middle reaches of Yangtze River |
| 投稿时间：2015-10-22 |
| DOI：10.11654/jaes.2016.05.020 |
| 中文关键词: 柱状沉积物 TOC TN 重金属 相关分析 主成分分析 |
| 英文关键词: core sediment TOC TN heavy metal correlation analysis principal component analysis |
| 基金项目:国家水体污染控制与治理科技重大项目(2012ZX07101-001) |
| 作者 | 单位 | E-mail | | 罗明科 | 湘潭大学化工学院, 湖南 湘潭 411105
中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012 | | | 田学达 | 湘潭大学化工学院, 湖南 湘潭 411105 | | | 余辉 | 中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012 | yuhui@craes.org.cn | | 杨超 | 环境保护部环境与经济政策研究中心, 北京 100029 | | | 牛远 | 中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012 | | | 刘鹏 | 湘潭大学化工学院, 湖南 湘潭 411105
中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012 | | | 牛勇 | 中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012 | |
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| 中文摘要: |
| 为研究长江中游湖泊沉积物污染的变化规律和主要来源,采集了武汉东湖、黄石海口湖、钟祥南湖3个不同类型湖泊的柱状沉积物,研究总有机碳(TOC)、总氮(TN)和重金属(Zn、Cu、Ni、Cr、Pb)的垂直分布特征。结果表明:3个湖泊沉积物TOC、TN含量从底层到表层总体呈增加趋势,30~10 cm增加速度较大,与各湖泊环境演变时间一致,其中TOC含量最大的是黄石海口湖,TN含量最大的是武汉东湖。研究区Zn、Cu、Pb受人为影响较大,Cr主要来自土壤环境,5种金属污染程度为武汉东湖>黄石海口湖>钟祥南湖。主成分分析和相关性分析表明,三个湖泊污染人为贡献率大于自然贡献率,营养盐和重金属Pb是共有的污染问题,重金属的污染来源受多种因素控制。 |
| 英文摘要: |
| Sediment vertical pollution characteristics are important for understanding the history of lake pollution. Here sediments from Lake Donghu in Wuhan, Lake Haikou in Huangshi, and Lake Nanhu in Zhongxiang in the middle reaches of the Yangtze River were collected to reveal the variation patterns and the main pollution sources of pollutants. The vertical distributions of total organic carbon(TOC), total nitrogen(TN), and heavy metals(Zn, Cu, Ni, Cr, Pb) were examined. Results showed that:concentrations of TOC and TN increased rapidly from 10 to 30 cm depth of sediment, which was consistent with the environmental changes around the lakes. The maximum value of TOC concentrations appeared in Lake Haikou, while that of TN concentrations occurred in Lake Donghu. Zn, Cu and Pb were mainly influenced by human activities, while Cr was primarily derived from natural sources. The pollution of heavy metals decreased in order of Lake Donghu>Lake Haikou>Lake Nanhu. Correlation analysis and principal component analysis showed that pollution contributed by human activities was greater than that by natural sources in these three lakes. Nutrients and Pb were the common pollutants. Heavy metal pollution in the sediments of these three lakes was affected by multiple factors. These results would provide useful information for controlling lake pollution in this area. |
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