Variation characteristics of heavy metals and nutrients in the core sediments of Taihu Lake and their pollution history
文献类型：期刊论文
| 作者 | Liu Enfeng; Shen Ji; Liu Xingqi; Zhu Yuxin; Wang Sumin |
| 刊名 | SCIENCE IN CHINA SERIES D-EARTH SCIENCES
 |
| 出版日期 | 2006 |
| 卷号 | 49期号:supp页码:82-91 |
| 关键词 | sediments heavy metals nutrients human activities pollution history Taihu Lake |
| ISSN号 | 1006-9313 |
| 英文摘要 | The sedimentary environment change, trophic evolution and heavy metals pollution history of the northern Taihu Lake in the last 100 years are studied according to the sedimentary geochemical proxies of the core sediments, such as grain size, nutrients, heavy metals, diatom, etc. The nutrients in the sediments depended mainly on the lake internal circulation and the heavy metals were from natural geogenic sources before the 1920s, which were not influenced by human activities generally, and grain size was one of the key factors influencing heavy metals content in the sediments. The alternation of manner and strength of human activities in Taihu Lake catchment before and after the 1920s made the lake sediments coarser, and hence heavy metals and TP content decreased contrasted with that before the 1920s. TP content in sediments and water increased from the 1950s to late 1970s due to anthropogenic pollutants discharge, and the lake belonging to mesotrophic state. TN and TOC content and C/N ratio increased due to the increasing external pollutants into Taihu Lake by human activities, TIP content also increased obviously in water and sediments, and the diatom association was dominated by eutrophic species since the late 1970s, indicating the eutrophication state of Taihu Lake in this period. Meanwhile the increasing in heavy metals content, such as Cu, Mn, Ni, Pb and Zn, and their proportion of valid fractions in the sediments indicates that they all result from human pollutants since the late 1970s. The heavy metals in the surface sediments have certain potential biological toxicity due to the higher SEM/AVS ratio. |
| 公开日期 | 2012-03-08 |
| 源URL | [http://159.226.73.51/handle/332005/3007]  |
| 专题 | 南京地理与湖泊研究所_湖泊室 |
| 推荐引用方式 GB/T 7714 | Liu Enfeng,Shen Ji,Liu Xingqi,et al. Variation characteristics of heavy metals and nutrients in the core sediments of Taihu Lake and their pollution history[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2006,49(supp):82-91. |
| APA | Liu Enfeng,Shen Ji,Liu Xingqi,Zhu Yuxin,&Wang Sumin.(2006).Variation characteristics of heavy metals and nutrients in the core sediments of Taihu Lake and their pollution history.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,49(supp),82-91. |
| MLA | Liu Enfeng,et al."Variation characteristics of heavy metals and nutrients in the core sediments of Taihu Lake and their pollution history".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 49.supp(2006):82-91. |
入库方式： OAI收割
来源：南京地理与湖泊研究所
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