基于Meta分析的2000—2022年中国茶园土壤重金属污染风险评价与来源分析

doi:10.13305/j.cnki.jts.2024.01.002

摘要/Abstract

摘要： 重金属污染是影响茶园生态环境和茶叶产品安全的重要因素之一。针对我国主要茶产区（湖北、湖南、福建、云南、贵州、四川等省份）,搜集调查茶园土壤重金属Cu、Pb、As、Hg、Cd、Cr、Zn、Ni污染的相关文献,使用Meta分析方法计算单个研究的权重,从而获得各省份及全国茶园土壤重金属浓度的加权平均值,采用潜在生态风险指数法和地质积累指数法进行生态风险评估,并通过APCS-MLR模型进行来源分析。结果表明,与背景值相比,8种重金属均有一定程度的富集,其中Hg、Cd污染较为严重,Hg中度及以上风险主要分布在贵州、陕西、四川和安徽等内陆省份,Cd中度及以上风险主要分布于广东、福建、浙江、江苏、山东、海南等沿海省份,两种重金属主要表现为轻微至中度风险。与世界其他国家相比,发展中国家的茶园或农业用地重金属含量普遍较高,Cd、Hg是污染程度较为严重的元素。来源分析结果表明,第一、第二、第三、第四主成分分别为自然源、工业活动污染源、交通废气污染源、农业活动污染源,工农业活动是主要污染因素,Hg主要来自工业活动,Cd主要来自农业活动。

关键词: 茶园土壤, 重金属污染, Meta分析, 风险评价

Abstract: Heavy metal pollution is one of the important factors affecting the ecological environment of tea gardens and the safety of tea products. This study collected literature on heavy metal (Cu, Pb, As, Hg, Cd, Cr, Zn, Ni) pollutions in tea garden soils in major tea producing areas in China, including Hubei, Hunan, Fujian, Yunnan, Guizhou and Sichuan. The weight of a single study was obtained using meta-analysis method to obtain the weighted average of heavy metal concentrations in tea garden soils in each province and across the country. The potential ecological risk index method and geological accumulation index method were used for ecological risk assessment, and source analysis using the APCS-MLR model was applied. The results show that compared with the background values, all 8 heavy metals were enriched to a certain extent, with Hg and Cd pollutions being more severe. The moderate and above risks of Hg were mainly distributed in inland provinces such as Guizhou, Shaanxi, Sichuan and Anhui. The moderate and above risks of Cd were mainly distributed in coastal provinces such as Guangdong, Fujian, Zhejiang, Jiangsu, Shandong, Hainan, etc. The two heavy metals show mild to moderate risks. Compared with other countries in the world, tea gardens or agricultural land in developing countries generally have higher levels of heavy metals, with Cd and Hg being the elements with more severe pollution levels. The source analysis results show that the first, second, third, and fourth principal components are natural sources, industrial activity pollution sources, traffic exhaust pollution sources, and agricultural activity pollution sources, respectively. Industrial and agricultural activities are the main pollution factors, with Hg mainly coming from industrial activities and Cd mainly coming from agricultural activities.

Key words: tea garden soil, heavy metal pollution, meta-analysis, risk assessment

中图分类号:

杨琰琥, 陈潇涵, 张晓晴, 任大军, 张淑琴, 陈旺生. 基于Meta分析的2000—2022年中国茶园土壤重金属污染风险评价与来源分析[J]. 茶叶科学, 2024, 44(1): 37-52. doi: 10.13305/j.cnki.jts.2024.01.002.

YANG Yanhu, CHEN Xiaohan, ZHANG Xiaoqing, REN Dajun, ZHANG Shuqin, CHEN Wangsheng. Risk Assessment and Source Analysis of Heavy Metal Pollution in Chinese Tea Gardens in 2000-2022 Based on Meta-analysis[J]. Journal of Tea Science, 2024, 44(1): 37-52. doi: 10.13305/j.cnki.jts.2024.01.002.

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