6Lavicoli I, Fontana L, Bergamaschi A. The effect of metals as endocrine disruptors [ J ]. J Toxicol Environ Health B Crit Rev , 2009, 12 (3) : 206.
7Zhang Manyin, Cui Lijuan, Sheng Lianxi, et al. Distribution and enrichment of heavy metals among sediments, water body and plants in Hengshuihu Wetland of Northern China[J]. Ecological Engineering, 2009(35): 563-569.
8Khan S, Cao Q, Zheng Y M, et al. Health risks of heavy metals in contaminated soils and food crops irrigated with wastewater in Beijing, China[ J]. Environ Pollution, 2008, 152: 686-692.