Bioavailability of heavy metals in soil of the Tieguanyin tea garden, southeastern China

• 作者: Jingwei Sun Ruilian Yu Gongren Hu Songhe Jiang Yunfeng Zhang Xiaoming Wang
• 学科: 地球科学
• 关键词: Geo-accumulation index Tieguanyin tea garden Heavy metals Bioavailability Dilute nitric acid extraction Southeastern China
• 年，卷（期）: 2022,（3）
• 页码范围: 519-524
• 页数: 5页
• 语种: 英文
• DOI: 10.1007/s11631-017-0224-9

摘要

The bioavailability of 22 heavy metals was investigated at 19 sampling sites in Tieguanyin tea garden in Anxi County, Fujian Province, southeastern China. Heavy metal concentrations were determined by inductively coupled plasma-mass spectrometry (ICP-MS) and evaluated by geo-accumulation index (Igeo). Dilute nitric acid extraction was used to evaluate biological activity. Cu, Pb, and Cd were highly bioavailable and most easily absorbed by tea trees. Heavy metal bioavailability in the surface soil was as the ratio of the effective state to the total amount. Cd had the highest Igeo values, and the respective samples and sites were classified as moderately/strongly contaminated. Cd element is considered the main factor of heavy metal pollution in the tea garden in Anxi. The other heavy metals studied were present in lower concentrations; thus, the samples were classified as uncontaminated or slightly contaminated.