Concentrations, leachability, and health risks of mercury in green tea from major production areas in China
文献类型:期刊论文
作者 | Qingfeng Wang; Dan Wang; Zhonggen Li; Yuyu Wang; Yan Yang; Mengxun Liu; Dadong Li; Guangyi Sun; Boping Zeng |
刊名 | Ecotoxicology and Environmental Safety |
出版日期 | 2022 |
卷号 | 232页码:113279 |
关键词 | Mercury Tea Brewing Leaching Character Tea Infusion Exposure Risk |
DOI | 10.1016/j.ecoenv.2022.113279 |
英文摘要 | Green tea has many health benefits and is the most consumed type in China. However, the heavy metals and contaminants in tea can also pose a great risk to human health. In this study, mercury (Hg) concentration in green tea collected from 11 provinces in China was examined. The leaching characteristics of Hg during brewing and the associated exposure to drinkers were also evaluated. Results indicated a low potential of Hg accumulation in green tea. The Hg content of green tea from Wanshan District, Guizhou Province—which has the largest Hg mine in China and is severely contaminated by Hg—could be limited by controlling the harvest time of tea leaves. The average Hg content of green tea from 43 tea production sites in China was only 6.3 ± 6.4 µg/kg dry weight. The brewing experiments of green tea showed that the leaching ratio of Hg was 22.61 ± 7.58% for 40 min of a single brew, and increased to 32.83 ± 12.37% after four rounds (3 min/ round) of brewing. The leaching of Hg from tea leaves was significantly affected by leaching time, temperature, and solid-liquid ratio but not by water hardness. The risk of Hg exposure from green tea intake was found to be very low, with an average hazard quotient (HQ) value of only 1.82 ± 1.85% for a single brew in 40 min and 2.64 ± 2.68% after four rounds of brewing. However, in some highly contaminated areas, with HQ values as high as 43.12 ± 2.41%, green tea intake may still pose a high risk of Hg exposure, and this risk should not be ignored.
|
URL标识 | 查看原文 |
语种 | 英语 |
源URL | [http://ir.gyig.ac.cn/handle/42920512-1/13492] |
专题 | 地球化学研究所_环境地球化学国家重点实验室 |
作者单位 | 1.Department of Resources and Environment, Zunyi Normal College, Zunyi 563006, PR China 2.Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang 550004, PR China 3.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, PR China |
推荐引用方式 GB/T 7714 | Qingfeng Wang,Dan Wang,Zhonggen Li,et al. Concentrations, leachability, and health risks of mercury in green tea from major production areas in China[J]. Ecotoxicology and Environmental Safety,2022,232:113279. |
APA | Qingfeng Wang.,Dan Wang.,Zhonggen Li.,Yuyu Wang.,Yan Yang.,...&Boping Zeng.(2022).Concentrations, leachability, and health risks of mercury in green tea from major production areas in China.Ecotoxicology and Environmental Safety,232,113279. |
MLA | Qingfeng Wang,et al."Concentrations, leachability, and health risks of mercury in green tea from major production areas in China".Ecotoxicology and Environmental Safety 232(2022):113279. |
入库方式: OAI收割
来源:地球化学研究所
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。