Sediment records of Sb and Pb stable isotopic ratios in Lake Qinghai

被引：10

作者：

Xu, Libin ^{[1
]}

Wu, Fengchang ^{[1
]}

Zheng, Jian ^{[2
]}

Xie, Qianli ^{[3
]}

Li, Huixian ^{[1
]}

Liao, Haiqing ^{[1
]}

Zhao, Xiaoli ^{[1
]}

Guo, Fei ^{[1
]}

机构：

[1] Chinese Res Inst Environm Sci, State Environm Protect Key Lab Lake Pollut Contro, Beijing 100012, Peoples R China

[2] Natl Inst Radiol Sci, Nakaminato Lab Marine Radioecol, Environm Radiat Effects Res Grp, Hitachinaka, Ibaraki 3111202, Japan

[3] Trent Univ, Worsfold Water Qual Ctr, Peterborough, ON K9H 7B8, Canada

来源：

MICROCHEMICAL JOURNAL | 2011年 / 97卷 / 01期

关键词：

Antimony; Sediment; Lake Qinghai; Pb isotopic ratios; OMBROTROPHIC PEAT BOG; ANTIMONY; LEAD; ENVIRONMENT;

D O I：

10.1016/j.microc.2010.05.012

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A sediment core in Lake Qinghai in northwest China was collected in 2006. Cs-137 and Pb-210 activities were analyzed to investigate the chronology of the sediment core. Sb and Pb concentrations, and Pb stable isotopic ratios were analyzed to study the historical atmospheric deposition records and sources of Sb over the past 15 centuries. The Sb concentration was 4.21 +/- 1.52 mu g/g in the sediments, its vertical distribution of Sb shows three large peaks in the recent two centuries, 1799, 1896 and 1944, coincided with Sb contamination from large wars, respectively. The peak in 1920 responded the large earthquake that happened in northern China, which was not far away from Lake Qinghai. The Sb/Pb ratio, Pb-206/Pb-207 and Pb-208/Pb-206 results suggest that Sb and Pb were probably from the ores in South China and coals in North China before 1965, but obviously from uses of leaded gasoline after 1965. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：25 / 29

页数：5

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