Historical change of soil Pb content and Pb isotope signatures of the cultural layers in urban Nanjing
文献类型：期刊论文
| 作者 | Zhang, Gan-Lin; Yang, Feng-Gen; Zhao, Wen-Jun; Zhao, Yu-Guo; Yang, Jin-Ling; Gong, Zi-Tong |
| 刊名 | CATENA
 |
| 出版日期 | 2007-01-16 |
| 卷号 | 69期号:1页码:51-56 |
| 关键词 | urban soils cultural layer pollution heavy metals Pb isotope history |
| ISSN号 | 0341-8162 |
| DOI | 10.1016/j.catena.2006.04.013 |
| 通讯作者 | Zhang, Gan-Lin(glzhang@issas.ac.cn) |
| 英文摘要 | Soils in urban areas are often artificially formed and preserved as cultural layers in which soil materials are mixed with artifacts. The vertical change of soil properties denotes the historical change of human activities, and therefore, urban soil can be considered as a record of history of urban development. We studied a deep profile of urban soil (600 cm) in Nanjing, China, by intensively sampling at every 5 cm. Soil samples were analyzed for lead content. Charcoal from several layers was found and was dated using C-14 to recognize archaeological cultural layers that might be formed in different Chinese dynasties. Pb isotope ratios were determined by thermal ionization mass spectrometry (TIMS) technology. The study found that artificial deposition, i.e., the formation of cultural layer started about 1700 years ago and lasted until recently. All cultural layers above the original loess were heavily contaminated by Pb with total content varying from 100 mg kg(-1) to more than 2000 mg kg(-1). There were several historical periods in which Pb content peaked, indicating significant contamination by human activities, such as ancient ore smelting for various purposes and use of Pb-containing materials for handicraft manufacture. Various Pb isotope ratios of the cultural layers differed substantially from that of the original undisturbed loess in the deepest position. Pb-206/Pb-207 value decreased gradually from the bottom layer to top layer, although with occasional exceptions, indicating a long-lasting mixing of extraneous sources of Pb during the entire history since ca. 300 A.D. In comparison with the isotope ratios of lead ores of different sources and that of aerosols, it was illustrated that the source of Pb in cultural layers might come from lead ores of southern China in the earlier dynasties, while Pb from north China might have contributed to the Pb source in the more recent years, suggested by the lowering of Pb-206/Pb-207 ratio in the near-surface cultural layers. However, the impact of petrol burning on cultural layers was basically excluded, considering the relatively short history of petroleum use in this area. (c) 2006 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | HONG-KONG ; STREET DUSTS ; HEAVY-METAL ; LEAD ; CONTAMINATION ; RATIOS ; GEOCHEMISTRY ; ENVIRONMENT ; CHINA |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| WOS类目 | Geosciences, Multidisciplinary ; Soil Science ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000243744000006 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558698 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Zhang, Gan-Lin |
| 作者单位 | Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Gan-Lin,Yang, Feng-Gen,Zhao, Wen-Jun,et al. Historical change of soil Pb content and Pb isotope signatures of the cultural layers in urban Nanjing[J]. CATENA,2007,69(1):51-56. |
| APA | Zhang, Gan-Lin,Yang, Feng-Gen,Zhao, Wen-Jun,Zhao, Yu-Guo,Yang, Jin-Ling,&Gong, Zi-Tong.(2007).Historical change of soil Pb content and Pb isotope signatures of the cultural layers in urban Nanjing.CATENA,69(1),51-56. |
| MLA | Zhang, Gan-Lin,et al."Historical change of soil Pb content and Pb isotope signatures of the cultural layers in urban Nanjing".CATENA 69.1(2007):51-56. |
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来源：南京土壤研究所
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