Mercury drop trend in urban soils in Beijing, China, since 1987

doi:10.1016/j.gexplo.2012.09.007

	Mercury drop trend in urban soils in Beijing, China, since 1987
	Cheng, Hangxin 6; Zhao, Chuandong ; Liu, Fei ; Yang, Ke ; Liu, Yinghan ; Li, Min 1; Peng, Min ; Li, Kuo ; Nie, Haifeng ; Zhang, Qin
刊名	JOURNAL OF GEOCHEMICAL EXPLORATION
	2013
卷号	124 页码:195-202
关键词	Drop trend Soil Hg Beijing China
ISSN号	0375-6742
DOI	10.1016/j.gexplo.2012.09.007
英文摘要	Mercury (Hg) concentration and its change trend in soils was investigated at different periods in Beijing. An Hg-enriched area with 1000 ng.g(-1) Hg concentration was delineated within the Third Ring Road of the city, where the capital of the Ming Dynasty was situated approximately 500 years ago. The Hg concentration was attributed to the historical use of Hg and coal burning. The geometric mean of Hg concentration in Beijing was 714 ng.g(-1) in 1987, 375 ng.g(-1) in 2000, 294 ng.g(-1) in 2005, and 251 ng.g(-1) in 2009, indicating a drop in Hg concentration in the soil since 1987. The results show that the environmental quality of the soil Hg in Beijing had been significantly improving since 1987. The average topsoil Hg density (0 cm to 20 cm) decreased from 411 mg.m(-2) in 1987 to 178.0 mg.m(-2) in 2005, with an annual decrease of 4661 kg and an annual average drop rate of 3.15%. The sharp decrease in soil Hg content is attributed to tight emission controls implemented by the Beijing Government since 2000 and Hg emission from topsoil. However, the amount of Hg emission from urban soils is comparable with the value of Hg emission from fuel coal, oil, and natural gas in Beijing, implying that natural Hg emissions from the soil are another important atmospheric Hg source expected for emissions from fuel combustion. (c) 2012 Elsevier B.V. All rights reserved.
学科主题	环境地质学
WOS关键词	STANDARD REFERENCE SAMPLES ; HEAVY-METALS ; ATMOSPHERIC MERCURY ; MINING ; DISTRICT ; EMISSIONS ; EXCHANGE ; NEVADA ; CITY ; GEOCHEMISTRY ; TESTS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000313930300017
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40224]
专题	中国地质科学院
作者单位	1.Chinese Acad Geol Sci, Inst Geophys & Geochem Explorat, Key Lab Geochem Cycling Carbon & Mercury Earths C, Langfang 065000, Peoples R China. 2.China Geol Survey, Beijing 100037, Peoples R China. 3.Univ Sci & Technol Beijing, Tianjing Coll, Tianjin 301830, Peoples R China. 4.Coll Geol Explorat Prospecting Tech Beijing, Beijing 102818, Peoples R China. 5.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China. 6.中国地质科学院地球物理地球化学勘查研究所
推荐引用方式 GB/T 7714	Cheng, Hangxin,Zhao, Chuandong,Liu, Fei,et al. Mercury drop trend in urban soils in Beijing, China, since 1987[J]. JOURNAL OF GEOCHEMICAL EXPLORATION,2013,124:195-202.
APA	Cheng, Hangxin.,Zhao, Chuandong.,Liu, Fei.,Yang, Ke.,Liu, Yinghan.,...&Huo, Xihe.(2013).Mercury drop trend in urban soils in Beijing, China, since 1987.JOURNAL OF GEOCHEMICAL EXPLORATION,124,195-202.
MLA	Cheng, Hangxin,et al."Mercury drop trend in urban soils in Beijing, China, since 1987".JOURNAL OF GEOCHEMICAL EXPLORATION 124(2013):195-202.