Heavy metals content in tea and associated production soils in Eastern Hubei, China
In order to provide a scientific basis for converting conventional tea plantations to organic plantations in eastern Hubei, China, seven heavy metals contents were investigated by sampling and analyses for: Cd, Hg, As, Pb, Cr, Cu and Zn in tea plantation soils, as well as Cu, Pb and Zn in tea. Results showed that the content of five elements, including Cd, Hg, As, Pb and Cr, conformed to a Grade I Standard for soil environmental quality. Values higher than standard for Cu and Zn, respectively, accounted for 66.7％ and 100％.Analysis for the comprehensive pollution index indicated that heavy metals in the soil for 90％ of the sampling points reached a low-grade pollution level. Values for Cu and Zn in soils reached an overbalance level but do not impact the safety of tea. Zn content in the tea is not above its critical value in the plant, the content Cu and Pb in tea were between 7.65-14.4 mg kg-1 and 0.146-0.320 mg kg-1, respectively. These values for Cu and Pb are below the safety threshold for the organic tea.
X.Y.Hu D.L.Chen
School of Environmental Studies, China University of Geosciences, Wuhan, China
国际会议
第十二届水-岩相互作用国际研讨会(P0roceedings of the 12th International Symposium on Water-Rock Interaction)
昆明
英文
871-874
2007-07-31（万方平台首次上网日期，不代表论文的发表时间）