School of Environment, Beijing Normal University/State Key Laboratory of Water Environment Simulation, Beijing 100875, China.
Environ Pollut. 2010 Jan;158(1):48-54. doi: 10.1016/j.envpol.2009.08.028. Epub 2009 Sep 17.
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.
采集了北京市商业区 (BA)、古典园林 (CG)、文化教育区 (CEA)、公共绿地 (PGS)、居民区 (RA) 和路边区 (RSA) 等 127 个城市土壤样本，研究了其中的汞 (Hg) 浓度。北京市 Hg 浓度的中位数为 0.26mg/kg。CG 区的 Hg 浓度明显高于其他 5 种土地利用类型，这是由于历史上 Hg 的使用。根据中国、英国、加拿大和美国环保署的指导值，超过 87%的样本未受到污染。空间分布图显示，Hg 浓度从市中心向郊区呈下降趋势，随着城市的发展而增加。北京市城区 Hg 污染具有与人类活动相关的非点源污染特征，很可能是城市 Hg 污染的共同特征。
