Relationship between heavy metal concentrations of herbaceous plants and soils at four Pb-

Relationship between heavy metal concentrations of herbaceous plants and soils at four Pb-Zn

mining sites in Yunnan, China

Yuan LI;Yanqun ZU;Qixian FANG;Zhaohua GAO;Christian SCHVARTZ

【期刊名称】《中国高等学校学术文摘·环境科学与工程》 【年(卷),期】2009(003)003

【摘要】This paper studied the relationship between heavy metal concentrations of herbaceous plants and soils at four Pb-Zn mining sites in Yunnan, China. 50 herbaceous plant samples of 9 plant species from 4 families and 50 soil samples were collected and then analyzed for the total concentrations of Pb, Cd, and Zn.The results showed that the average concentrations of Pb,Cd, and Zn in soil samples were 3772.83, 168.81, and 5385.65 mg/kg, respectively. The average concentrations of Pb, Cd, and Zn were 395.68, 28.14, and 1664.20 mg/kg in the shoots, and 924.12, 57.25, and 1778.75 mg/kg in the roots, respectively. Heterospecific plants at the same site and conspecific plants at various sites had different average levels of Pb, Cd, and Zn, both in the shoots and the roots.Enrichment coefficients of Pb, Cd, and Zn were greater than 1 in 2, 3, and 9 herbaceous plant samples,respectively. Translocation factors of Pb, Cd, and Zn were greater than 1 in 10, 17, and 25 herbaceous plant samples, respectively. In all 50 samples, the concentrations of Pb, Cd, and Zn between the