北京市房山区土壤重金属元素分布、富集特征及来源解析

韩冰, 黄勇, 李欢, 安永龙

Distributions, enrichment characteristics, and sources of heavy metals in soils in Fangshan District, Beijing

HAN Bing, HUANG Yong, LI Huan, AN Yong-Long

图7 Cd(a)和Hg(b)富集系数空间分布

Fig.7 Spatial distribution of enrichment coefficient of Cd (a) and Hg (b)