中国科学院重庆绿色智能技术研究院机构知识库

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	Heavy metals in soils from a representative rapidly developing megacity (SW China): Levels, source identification and apportionment
	Li, Siyue1; Jia, Zhongmin2,3
	2018-04-01
摘要	Soil heavy metal pollution now is a major environmental concern in China particularly in some rapidly developing areas with intensified agricultural practices. High-spatial-resolution sampling (1664 surface (0-20 cm) and 416 deep (150-200 cm) soil samples) was undertaken in four typical agricultural Counties of Municipality Chongqing (SW China) and consequently eight priority heavy metals (HMs; As, Cd, Cr, Cu, Hg, Ni, Pb and Zn) and other elements were measured. Classic and advanced multivariate statistics and multi-linear regression with factor analysis (FA-MLR) receptor modeling were applied for characterization and sources apportionment of HMs in soils. There was notably spatial variability in eight priority HMs with the mean concentrations decreasing as follows: Zn > Cr > Ni > Pb > Cu > As > Cd > Hg. Soil contamination was enhanced by As, Cd, Cr, while obvious enrichment of Cd and Hg in surface soils in comparison with deep soils should be noted. We revealed dominant anthropogenic contributions (64%-90%) of metal - bearing industrial emission, fuel consumption and agriculture to certain HMs, while the abundant elements of Si, Al and Fe were natural in origin. Our study will be helpful for improving soil environment and strengthening the capacity of multivariate statistic techniques and models in soil pollution research.
关键词	Soil heavy metals Source quantification Multivariate analysis Anthropogenic contributions Yangtze Basin Spatial distribution
DOI	10.1016/j.catena.2017.12.035
发表期刊	CATENA
ISSN	0341-8162
卷号	163页码:414-423
收录类别	SCI
WOS记录号	WOS:000427332000035
语种	英语