Fractionation and Bioavailability of Trace Elements in Wuyi Rock Tea Garden Soil
Hongmeng Ye1, 2, Guoping Li1, Xuyin Yuan1, 2, Maozhong Zheng1
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1Fujian Provincial Key Laboratory of Eco-Industrial Green Technology, College of Ecology and Resource Engineering,
Wuyi University, Wuyishan, Fujian 354300, P.R. China
2Key Laboratory for Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education,
College of the Environment, Hohai University, Nanjing, Jiangsu 210098, P.R. China
Submission date: 2017-05-25
Final revision date: 2017-07-07
Acceptance date: 2017-07-10
Online publication date: 2017-12-01
Publication date: 2018-01-02
Pol. J. Environ. Stud. 2018;27(1):421–430
The chemical fraction of elements has been widely employed in the study of soil chemistry, plant nutrition, and environmental science. For this study we conducted a comprehensive survey on trace elements (Hg, As, Cd, Cr, Pb, Cu, Zn, Mn, Se, Mo, Co, etc.) from the rock tea gardens in Wuyishan, southeastern China. Our results demonstrate that:
1) The contents of heavy metals such as Hg, Pb, As, and Cd in the soil meet the environmental requirements for the growing area of tea (NY/T 853-2004), and the soil in the studied area contains sufficient Mn, Mo, and Se for tea plant growth, with a slight lack of Co.
2) The exchangeable fraction is determined to be the dominant fraction of Cd, which originates from an anthropogenic source and possesses high bioavailability from elemental speciation analysis.
3) The heavy metal contents in all the tea leaf samples are within the safe range, and the average values of the element enrichment coefficients of the tea leaves decrease in the order: Mn > Cu > Hg > Zn > Se > Cd > Mo > Co > As > Pb > Cr.