Mercury in urban soils with various types of land use in Beijing, China
Mercury in urban soils with various types of land use in Beijing, China
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中国北京不同土地利用类型城市土壤中的汞
DOI：
10.1016/j.envpol.2009.08.028
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发表时间：
2010-01-01
影响因子：
8.9
通讯作者：
Guo, Xuejun
中科院分区：
文献类型：
--
作者：
Chen, Xi;Xia, Xinghui;Guo, Xuejun
采集了北京市商业区、古典园林、文教区、公共绿色空间、居住区和道路旁127个土壤样品，分析了土壤中汞的含量。北京市汞浓度中位数为0.26 mg/kg。CG土地利用类型的土壤汞含量值远高于其他5种土地利用类型，这与历史上汞的利用有关。根据中国、英国、加拿大和美国环保局的指导值，超过87%的样品未受到污染。空间分布图显示，汞浓度从中心城区向郊区呈递减趋势，随着城区年龄的增长，汞浓度逐渐升高。北京市城区汞污染具有明显的非点源特征，与人类活动有关，是城市汞污染的共同特征。(C)2009爱思唯尔有限公司保留所有权利。
Mercury (Hg) concentration was investigated for 127 urban soil samples collected from business area (BA), classical garden (CG), culture and education area (CEA), public green space (PGS), residential area (RA) and roadside area (RSA) in Beijing. The median of Hg concentration in Beijing was 0.26 mg/kg. The value in CG was much higher than the other 5 types of land use, which was due to the historical use of Hg. More than 87% of the samples were not contaminated according to the guideline values of China, UK, Canada, and USEPA. Spatial distribution map revealed that Hg concentration showed a decreasing trend from the center to the suburb, it increased with the age of the urban area. Hg contamination in urban area of Beijing is marked by features of non-point sources associated with human activities, and it is most likely to be the common characteristics of Hg contamination in cities. (C) 2009 Elsevier Ltd. All rights reserved.