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中国某些地区不同类型茶叶中有毒金属的检测：空间污染特征和潜在健康风险评

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2024-12-16 15:04

中国某些地区不同类型茶叶中有毒金属的检测：空间污染特征和潜在健康风险评估

摘要

茶是世界上最受欢迎的饮料之一，但茶中的有毒金属可能威胁人体健康。在全国范围内，茶叶中有毒金属的污染状况尚不清楚。在这里，我们检测了中国22个省收集的茶叶中的镉(Cd)和砷(As)浓度。主要结论如下:(1)中国茶叶样品中Cd和As的平均浓度分别为1.163和0.485 mg/kg;镉含量超过中华人民共和国农业部规定的标准(NY 659-2003)，但砷含量未超过标准。Cd和As的平均浓度南部和西部地区分别为5.730、0.071和0.510、0.580 mg/kg，东部和北部地区分别为0.203、0.040和0.455、0.463。Cd在苦鼎茶中含量最高，为21.98 mg/kg; As在茉莉花茶中含量最高，为0.76 mg/kg。(2)健康风险评价结果显示，镉和砷的目标危害商分别为0.1989和0.1432。总危害指数为0.3421，患癌风险为8.949 × 10-4。(3)主成分分析表明，西部和南部地区Cd污染较高，可能与矿区开采活动有关。这是中国首次在全国范围内对茶叶中的有毒金属镉和砷进行调查。我们的研究结果为确保茶叶生产的质量和安全提供了有益的参考，并建议需要对茶叶中的有毒金属进行持续监测，以限制超过允许限度的风险。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

摘要图片

Toxic Metal Detection in Various Types of Tea from Certain Regions of China: Spatial Pollution Characteristics and Potential Health Risk Assessment

Tea is one of the most popular beverages in the world, but toxic metals in tea could threaten human health. The toxic metal pollution status of tea in China at a national level remains unclear. Here, we detected the cadmium (Cd) and arsenic (As) concentrations of tea collected from 22 provinces in China. The major points are the following: (1) average concentrations of Cd and As of tea samples in China were 1.163 and 0.485 mg/kg, respectively; the Cd but not As levels exceeded the standards from the Ministry of Agriculture of the People’s Republic of China (NY 659-2003). Cd and As average concentrations were higher in the Southern and Western regions at 5.730, 0.071 and 0.510, 0.580 mg/kg, respectively, compared with the Eastern and Northern regions at 0.203, 0.040 and 0.455, 0.463, respectively. The concentration of Cd was highest in kuding tea at 21.98 mg/kg, whereas the As concentration was highest in jasmine tea at 0.76 mg/kg. (2) The health risk assessment yielded target hazard quotients for Cd and As of 0.1989 and 0.1432, respectively. The total hazard index was 0.3421, and the cancer risk was 8.949 × 10–4. (3) The principal component analysis revealed higher Cd pollution in the Western and Southern areas, which may be related to mining activities. This is the first national-scale investigation of the toxic metals Cd and As in tea across China. Our findings provide a useful reference for ensuring the quality and safety of tea production and suggest the need for constant monitoring of toxic metals in tea to limit the risk of exceeding permitted limits.

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来源期刊

ACS Earth and Space Chemistry

期刊介绍： The scope of ACS Earth and Space Chemistry includes the application of analytical, experimental and theoretical chemistry to investigate research questions relevant to the Earth and Space. The journal encompasses the highly interdisciplinary nature of research in this area, while emphasizing chemistry and chemical research tools as the unifying theme. The journal publishes broadly in the domains of high- and low-temperature geochemistry, atmospheric chemistry, marine chemistry, planetary chemistry, astrochemistry, and analytical geochemistry. ACS Earth and Space Chemistry publishes Articles, Letters, Reviews, and Features to provide flexible formats to readily communicate all aspects of research in these fields.

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