Accumulation of Heavy Metals in Tea Leaves and Potential Health Risk Assessment: A Case Study from Puan County, Guizhou Province, China

International Journal of Environmental Research and Public Health
Jian ZhangLei Gao

Abstract

This study features a survey of the concentrations of aluminum (Al) and heavy metals (Mn, Pb, Cd, Hg, As, Cr, Ni, Cu, and Zn) in tea leaves and the corresponding cultivation soils (0-30 cm), carried out in Puan County (Guizhou Province, China). The average concentrations of Al, Mn, Pb, Cd, Hg, As, Cr, Ni, Cu, and Zn in the soil were 106 × 10³, 214, 20.9, 0.09, 0.12, 17.5, 121, 27.8, 131.2, and 64 mg·kg-1, respectively. The heavy metals' pollution indexes in the soil can be ranked as follows: Cu > Cr > Hg > As > Ni > Zn > Pb > Mn > Cd. The soil was moderately polluted by Cu because of the high geochemical background value of Cu in the area. The potential environment risk index (RI) showed that 7.69% out of the total sample sites were within the moderate level. Moreover, the ranges of Al, Mn, Pb, Cd, Hg, As, Cr, Ni, Cu, and Zn concentrations in young tea leaves were 250-660, 194-1130, 0.107-0.400, 0.012-0.092, 0.014-0.085, 0.073-0.456, 0.33-1.26, 6.33-14.90, 14.90-26.10, and 35.8-50.3 mg·kg-1, respectively. While in mature tea leaves, they were 4300-10,400, 536-4610, 0.560-1.265, 0.040-0.087, 0.043-0.089, 0.189-0.453, 0.69-2.91, 3.43-14.20, 6.17-16.25, and 9.1-20.0 mg·kg-1, respectively. Furthermore, the concentrations of Pb, Cu,...Continue Reading

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Citations

Dec 11, 2019·International Journal of Molecular Sciences·Guo-Yi TangHua-Bin Li
Jan 1, 2020·Food Science & Nutrition·Fatemeh PourramezaniElham Khalili Sadrabad
Nov 21, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Jian ZhangChunlin Liu
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May 1, 2021·Biological Trace Element Research·Nayara Caroline Majewski UlbrichMartin R Broadley
Jun 3, 2021·International Journal of Environmental Research and Public Health·Grażyna Kowalska
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Jan 29, 2022·Bulletin of Environmental Contamination and Toxicology·Xiaomei XuDali Sun
Jan 16, 2022·The Science of the Total Environment·Mei YangZongmao Chen

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