Relationship between 210Pbex activity and sedimentary organic carbon in sediments of 3 Chinese lakes | |
Libin Xu; Fengchang Wu; Guojiang Wan![]() | |
2011 | |
发表期刊 | Environmental Pollution
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卷号 | 159期号:12页码:3462-3467 |
摘要 | This report demonstrates that organic matter was an important factor in lake sediment 210Pbex dating. Sediment cores from lakes in central and western China with different-trophic levels were collected, and the 210Pbex activity and total organic carbon (TOC) were measured. The Rock-Eval pyrolysis technique was used to deconvolute TOC into free hydrocarbons (S1), thermally less-stable macromolecular organic matter (S2a), kerogen (S2b), and residual carbon (RC). The results show significant correlations between TOC and 210Pbex, particularly between S2a and 210Pbex, in all the sediment cores. This indicated that the algal-derived organic component S2a may play the most important role in controlling the distribution of 210Pbex. Scavenging by algal-derived organic matter may be the main mechanism. As chronology is the key to the understanding of pollution reconstruction and early diagenesis in sediments, more attention should be paid to the influence of organic matter on 210Pbex. |
关键词 | 210pbex 210pb Dating rock-eval Pyrolysis scavenging lake Sediment |
收录类别 | SCI |
语种 | 英语 |
文献类型 | 期刊论文 |
条目标识符 | http://ir.gyig.ac.cn/handle/42920512-1/9478 |
专题 | 环境地球化学国家重点实验室 |
作者单位 | 1.State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China 2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 3.Department of Plant, Soil and Insect Sciences, University of Massachusetts, USA |
推荐引用方式 GB/T 7714 | Libin Xu,Fengchang Wu,Guojiang Wan,et al. Relationship between 210Pbex activity and sedimentary organic carbon in sediments of 3 Chinese lakes[J]. Environmental Pollution,2011,159(12):3462-3467. |
APA | Libin Xu,Fengchang Wu,Guojiang Wan,Haiqing Liao,Xiaoli Zhao,&Baoshan Xing.(2011).Relationship between 210Pbex activity and sedimentary organic carbon in sediments of 3 Chinese lakes.Environmental Pollution,159(12),3462-3467. |
MLA | Libin Xu,et al."Relationship between 210Pbex activity and sedimentary organic carbon in sediments of 3 Chinese lakes".Environmental Pollution 159.12(2011):3462-3467. |
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