云南省典型茶园重金属元素地球化学特征及风险性评估

doi:10.13305/j.cnki.jts.2023.04.004

摘要/Abstract

摘要： 为探明茶园地质背景与茶叶之间重金属元素含量的关系与现状,以云南省勐库茶园和景迈茶园中的岩石、土壤和茶叶为研究对象,测定10种重金属元素（Hg、Cd、Pb、Co、Cr、Cu、Mn、Ni、Zn、As）的含量,采用多元统计分析和空间分析方法对茶园重金属进行特征总结和风险评价。结果表明：（1）与地壳元素丰度相比,勐库茶园和景迈茶园岩石中的As是富集元素,勐库茶园岩石中的Hg和景迈茶园岩石中Mn元素是贫乏元素;（2）勐库茶园土壤主要以As和Cr污染为主,景迈茶园土壤主要以Cr和Cu污染为主,均为轻度污染,土壤质量良好;（3）茶叶重金属元素的平均含量顺序主要为Mn>Zn>Cu>Ni>Cr,富集能力依次是Mn>Zn>Hg>Cu>Ni,仅有勐库茶园个别茶样As含量超标,茶叶中重金属含量总体处于安全级别;（4）勐库茶园和景迈茶园茶叶中Mn非致癌风险最高,勐库茶园茶叶As致癌风险最高,景迈茶园茶叶Cr致癌风险最高,其余重金属元素处于安全范围内。

关键词: 重金属, 变异系数, 地累积指数, 富集, 健康风险

Abstract: In order to explore the relationship and the current situation between the geological background of tea garden and the content of heavy metal elements in tea, the rocks, soil and tea in Mengku tea garden and Jingmai tea garden in Yunnan Province were selected as the research objects. The contents of 10 heavy metal elements (Cd, Co, Cr, Cu, Hg, Ni, Pb, Zn, Mn, As) were determined. Multivariate statistical analysis and spatial analysis were used to summarize the characteristics and risk assessment of heavy metals in tea gardens. The results show that: (1) compared with the abundance of elements in the crust, the rocks in Mengku and Jingmai tea gardens were rich in As. While the rocks of Mengku tea garden were poor in Hg and the rocks of Jingmai tea garden were poor in Mn. (2) The soil of Mengku tea garden was mainly polluted by As and Cr. The soil of Jingmai tea garden was mainly polluted by Cr and Cu. They were all lightly polluted and had good soil quality. (3) The average contents of heavy metal elements in tea followed the order of Mn>Zn>Cu>Ni>Cr. The accumulation ability followed the order of Mn>Zn>Hg>Cu>Ni. Only a few tea samples from Mengku tea garden had As content exceeding the standard. And the heavy metal contents in tea were generally at the safe level. (4) For tea samples from Mengku and Jingmai tea gardens, Mn had the highest non-carcinogenic risk. As in Mengku tea had the highest carcinogenic risk. Cr in Jingmai tea had the highest carcinogenic risk. And other heavy metal elements were within the safe range.

Key words: heavy metals, coefficient of variation, geoaccumulation index, enrichment, health risks

中图分类号:

谢萌丽, 常河, 周晓华, 杨天福, 龙坤. 云南省典型茶园重金属元素地球化学特征及风险性评估[J]. 茶叶科学, 2023, 43(4): 501-512. doi: 10.13305/j.cnki.jts.2023.04.004.

XIE Mengli, CHANG He, ZHOU Xiaohua, YANG Tianfu, LONG Kun. Geochemical Characteristics and Risk Assessment of Heavy Metals in Typical Tea Gardens in Yunnan Province[J]. Journal of Tea Science, 2023, 43(4): 501-512. doi: 10.13305/j.cnki.jts.2023.04.004.

参考文献

[1] 陈雅丽, 翁莉萍, 马杰, 等. 近十年中国土壤重金属污染源解析研究进展[J]. 农业环境科学学报, 2019, 38(10): 2219-2238.
Chen Y L, Weng L P, Ma J, et al.Review on the last ten years of research on source identification of heavy metal pollution in soils[J]. Journal of Agro-Environment Science, 2019, 38(10): 2219-2238.
[2] Li Q H, Li C F, Liu L J, et al.Geochemical characteristics of heavy metals of bedrock, soil, and tea in a metamorphic rock area of Guizhou Province, China[J]. Environmental Science and Pollution Research, 2023, 30(3): 7402-7414.
[3] Zhang J, Yang R D, Li Y C, et al.Distribution, accumulation, and potential risks of heavy metals in soil and tea leaves from geologically different plantations[J]. Ecotoxicology and Environmental Safety, 2020, 195: 110475. doi: 10.1016/j.ecoenv.2020.110475.
[4] 颜明娟, 林诚, 陈子聪, 等. 福鼎白茶茶园土壤有效锌与茶叶锌含量的相关性分析[J]. 福建农业科技, 2021, 51(2): 41-45.
Yan M J, Lin C, Chen Z C, et al.Correlation analysis of the available zinc content in soil of Fuding white tea gardens and the zinc content in tea leaves[J]. Fujian Agricultural Science and Technology, 2021, 51(2): 41-45.
[5] Wen B, Li L, Duan Y, et al.Zn, Ni, Mn, Cr, Pb and Cu in soil-tea ecosystem: the concentrations, spatial relationship and potential control[J]. Chemosphere, 2018, 204: 92-100.
[6] 崔世展, 沈宝华, 杨婉秋. 云南凤庆茶园不同季节茶叶中重金属元素的含量分布特征[J]. 昆明学院学报, 2021, 43(3): 38-40.
Cui S Z, Shen B H, Yang W Q.Distribution characteristics of heavy metal content in tea leaves in different seasons from Fengqing tea plantation in Yunnan[J]. Journal of Kunming University, 2021, 43(3): 38-40.
[7] Areo O M, Njobeh P B.Risk assessment of heavy metals in rooibos (Aspalathus linearis) tea consumed in South Africa[J]. Environmental Science and Pollution Research, 2021, 28(42): 59687-59695.
[8] 石航源, 王鹏, 郑家桐, 等. 中国省域土壤重金属空间分布特征及分区管控对策[J/OL]. 环境科学, 2022: 1-17 [2023-04-30]. https://doi.org/10.13227/j.hjkx.202208160.
Shi H Y, Wang P, Zheng J T, et al. Spatial distribution of soil heavy metals and regional control strategies in China at province level [J/OL]. Environmental Science, 2022: 1-17 [2023-04-30]. https://doi.org/10.13227/j.hjkx.202208160.
[9] 和淑娟, 曾沛艺, 杨牧青, 等. 云南省农用地土壤重金属高背景值区域发展绿色食品牌的对策建议[J]. 环境科学导刊, 2022, 41(5): 42-44, 89.
He S J, Zeng P Y, Yang M Q, et al.Countermeasures and suggestions on developing green food label in high background value of heavy metals in agricultural land in Yunnan Province[J]. Introduction to Environmental Science, 2022, 41(5): 42-44, 89.
[10] 李煜, 张萍, 吴红, 等. 六盘水市六枝特区茶园茶叶与土壤中微量元素的相关性分析[J]. 现代农业科技, 2022(11): 6-10.
Li Y, Zhang P, Wu H, et al.Correlation analysis on tea and soil trace elements in tea garden of Liuzhi special district, Liupanshui City[J]. Modern Agricultural Technology, 2022(11): 6-10.
[11] Sabir M, Baltrenaite-Gediene E, Ditta A, et al.Bioaccumulation of heavy metals in a soil-plant system from an open dumpsite and the associated health risks through multiple routes[J]. Sustainability, 2022, 14(20): 13223. doi: 10.3390/su142013223.
[12] 陈文轩, 李茜, 王珍, 等. 中国农田土壤重金属空间分布特征及污染评价[J]. 环境科学, 2020, 41(6): 2822-2833.
Chen W X, Li Q, Wang Z, et al.Spatial distribution characteristics and pollution evaluation of heavy metals in arable land soil of China[J]. Environmental Science, 2020, 41(6): 2822-2833.
[13] 中国环境监测总站. 中国土壤元素背景值[M]. 北京: 中国环境科学出版社, 1990.
China Environmental Monitoring Station. Background values of soil elements in China [M]. Beijing: China Environmental Science Press, 1990.
[14] 陈航, 王颖, 王澍. 铜山矿区周边农田土壤重金属来源解析及污染评价[J]. 环境科学, 2022, 43(5): 2719-2731.
Chen H, Wang Y, Wang S.Source analysis and pollution assessment of heavy metals in farmland soil around Tongshan mining area[J]. Environmental Science, 2022, 43(5): 2719-2731.
[15] Peng C Y, Zhu X H, Hou R Y, et al.Aluminum and heavy metal accumulation in tea leaves: an interplay of environmental and plant factors and an assessment of exposure risks to consumers[J]. Journal of Food Science, 2018, 83(4): 1165-1172.
[1] Mostafa G A E, Alsarhani E, Alsalahi R. Assessment of heavy metals in infused tea marketed in Riyadh, Saudi Arabia, using inductively coupled plasma-mass spectrometry: human health risk assessment[J]. International Journal of Environmental Analytical Chemistry, 2022. doi: 10.1080/03067319.2022.2045284.
[16] Tao C J, Song Y X, Chen Z, et al.Geological load and health risk of heavy metals uptake by tea from soil: what are the significant influencing factors[J]. Catena, 2021, 204: 105419. doi: 10.1016/j.catena.2021.105419.
[17] Kong F J, Chen Y C, Huang L, et al.Human health risk visualization of potentially toxic elements in farmland soil: a combined method of source and probability[J]. Ecotoxicology and Environmental Safety, 2021, 211: 111922. doi: 10.1016/j.ecoenv.2021.111922.
[18] 李静, 孙载波, 黄亮, 等. 滇西勐库退变质榴辉岩的P-T-t轨迹及地质意义[J]. 岩石学报, 2017, 33(7): 2285-2301.
Li J, Sun Z B, Huang L, et al.P-T-t path and geological significance of retrograded eclogites from Mengku area in western Yunnnan Province, China[J]. Acta Petrologica Sinica, 2017, 33(7): 2285-2301.
[19] 陈楠. 云南澜沧县打马河铅锌矿区构造地球化学特征及成矿预测研究[D]. 昆明: 昆明理工大学, 2014
Chen N.Geochemical characteristics and ore prediction of the Pb-Zn polymeallic district in Damahe of Lancang County, Yunnan [D]. Kunming: Kunming University of Science and Technology, 2014.
[20] 黎彤. 化学元素的地球丰度[J]. 地球化学, 1976(3): 167-174.
Li T.Chemical element abundances in the earthand it's major shells[J]. Geochemistry, 1976(3): 167-174.
[21] 张建. 贵州茶叶主产区环境地球化学特征与产地来源示踪研究[D]. 贵阳: 贵州大学, 2020.
Zhang J.Environmentally geochemical characteristics and geographical origin authentication of tea from major tea producing areas in Guizhou province, China [D]. Guiyang: Guizhou University, 2020.
[22] 李勖之, 姜瑢, 王国庆, 等. 不同国家农用地土壤环境标准比较与启示[J]. 环境科学, 2022, 43(2): 577-585.
Li X Z, Jiang R, Wang G Q, et al.A comparative study of sol environmental standards for agricultural land among different countries and its implication for China[J]. Environmental Science, 2022, 43(2): 577-585.
[23] 曾金樱, 田秀芳, 邱星群, 等. 汕头市湖库型饮用水水源地周边土壤重金属污染评价及源解析[J]. 环境科学导刊, 2022, 41(1): 66-70.
Zeng J Y, Tian X F, Qiu X Q, et al.Pollution assessment and source interpretation of heavy metals in soils around lake and reservoir-type drinking water sources in Shantou City[J]. Introduction to Environmental Science, 2022, 41(1): 66-70.
[24] 佚名. 《食品安全国家标准食品中真菌毒素限量》(GB2761—2017)及《食品安全国家标准食品中污染物限量》(GB 2762—2017)解读[J]. 中国食品卫生杂志, 2017, 29(2): 154, 229, 237, 250.
Anonymous. Interpretation of mycotoxins limits in national food safety standard (GB2761-2017) and pollutants limits in national food safety standard (GB 2762-2017)[J]. Chinese Journal of Food Hygiene, 2017, 29(2): 154, 229, 237, 250.
[25] 黄华斌, 于瑞莲, 卞凯, 等. 铁观音茶园土壤-茶叶中稀土元素的地球化学特征[J]. 稀土, 2018, 39(2): 141-147.
Huang H B, Yu R L, Bian K, et al.Geochemical characteristics of rare earth elements in Tieguanyin tea garden soil tea[J]. Rare Earth, 2018, 39(2): 141-147.
[26] 周国华, 孙彬彬, 贺灵, 等. 安溪土壤-茶叶铅含量关系与土壤铅临界值研究[J]. 物探与化探, 2016, 40(1): 148-153.
Zhou G H, Sun B B, He L, et al.Study on the relationship between lead content in soil and tea in Anxi and the critical value of soil lead[J]. Geophysical and Chemical Exploration, 2016, 40(1): 148-153.
[27] Wu X L, Zhang D, Wang F, et al.Risk assessment of metal(loid)s in tea from seven producing provinces in China[J]. Science of the Total Environment, 2023, 856: 159140. doi: 10.1016/j.scitotenv.2022.159140.
[28] 林承奇, 王凤婷, 胡恭任, 等. 安溪铁观音茶园土壤-茶叶重金属健康风险评价[J]. 食品工业, 2021, 42(5): 492-496.
Lin C Q, Wang F T, Hu G R, et al.Health risk assessment of heavy metals in soil-tea system from Tieguanyin tea garden of Anxi County[J]. Food Industry, 2021, 42(5): 492-496.