| 太湖表层沉积物AVS与SEM分布特征及相互关系 |
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| 引用本文： | 尹洪斌,范成新,蔡永久.太湖表层沉积物AVS与SEM分布特征及相互关系[J].湖泊科学,2008,20(5):585-590. |
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| 作者姓名： | 尹洪斌 范成新 蔡永久 |
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| 作者单位： | 1. 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京,210008;中国科学院研究生院,北京,100049
2. 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京,210008 |
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| 摘 要： | 对全太湖28点的表层沉积物中的AVS及SEM的分布特征与相关性进行研究.结果表明:表层沉积物的AVS浓度在空间分布上具有较大的波动(变异系数达100.77%),河口沉积物中赋存高浓度的AVS.结合AVS的分布特征得知:沉积速率及SO42-负荷可能是造成AVS空间差异性的原因.河口区域具有较高浓度的覵EM;太湖北部湖区沉积物覵EM浓度高于南部.应用SEM/AVS,SEM-AVS及SEM-AVS/foc这三个模型来评价太湖表层沉积物的质量(当SEM/AVS>9或SEM-AVS>2或SEM-AVS/foc>150靘ol/g(OC)时,沉积物重金属将具有毒性),结果表明:只有O#号点和6#号点超过这三个模型其中的一个和两个的阈值范围,其它采样点均在阈值范围之内.总之,除O#号点和6#号点外,太湖表层沉积物(约10cm)中重金属不会对底柄生物产生明显毒性.
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| 关 键 词： | AVS与SEM 重金属 沉积物质量 太湖 |
| 收稿时间： | 2007/7/19 0:00:00 |
| 修稿时间： | 2007/10/16 0:00:00 |
Distribution characteristic and correlation of AVS and SEM in surface sediments of Lake Taihu |
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| YIN Hong-bin,FAN Cheng-xin and CAI Yong-jiu.Distribution characteristic and correlation of AVS and SEM in surface sediments of Lake Taihu[J].Journal of Lake Science,2008,20(5):585-590. |
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| Authors: | YIN Hong-bin FAN Cheng-xin and CAI Yong-jiu |
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| Institution: | 1: State Key Laboratory of Lake Science and Environment;Nanjing Institute of Geography and Limnology;Chinese Academy of Sciences;Nanjing 210008;P.R.China;2: Graduate School of Chinese Academy of Sciences;Beijing 100049;P.R.China |
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| Abstract: | The distribution characteristic and correlation of AVS and SEM were studied in 28 surface sediments of whole Lake Taihu . The results showed that the concentration of AVS varied greatly in space (COV up to 100.77%), and high concentration of AVS were recorded in estuary of lake. Combined with the distribution characteristic of AVS, deposition rate and load of SO42- probably caused the spatial difference of AVS. The high concentration of SEM was recorded in the area of estuary, and the concentration of SEM i... |
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| Keywords: | AVS and SEM heavy metals quality of sediment Lake Taihu |
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