| 卢香,黄安香,柏文恋,张智琦,李丹,杨守禄,周华.贵州核桃仁矿质元素迁移特征及营养和健康风险评价[J].农业环境科学学报,2025,44(12):3070-3081. |
| 贵州核桃仁矿质元素迁移特征及营养和健康风险评价 |
| Translocation and nutrition/health risks assessment of mineral elements in walnut kernel growing in Guizhou |
| 投稿时间：2025-02-17 |
| DOI：10.11654/jaes.2025-0142 |
| 中文关键词: 核桃仁 矿质元素 迁移特征 营养评价 健康风险评价 |
| 英文关键词: walnut kernel mineral elements translocation characteristics nutritional evaluation health risk assessment |
| 基金项目:贵州省特色林业产业研究项目（XHTC-FW-2024-1380）；贵州省林业科研项目（黔林科合〔2025〕19号）；贵州省科技支撑计划项目（黔科合支撑〔2021〕一般130号）；贵州省高层次创新型人才项目（黔科合平台人才-GCC〔2023〕066） |
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| 中文摘要: |
| 为了解矿质营养元素和重金属在土壤-核桃仁系统中的迁移特征，以及核桃仁矿质元素的营养和健康风险状况，本研究测定了贵州全省 20个县区的 176对核桃仁及其土壤样品中矿质元素的含量，解析了贵州产核桃仁的矿质元素迁移特征、营养价值和健康风险。结果表明：核桃仁样品中矿质营养元素Fe、Mn、Cu、Zn、Se的含量均值依次为41.1、81.4、22.4、32.5、0.17 mg·kg-1，迁移能力大小依次为Cu>Zn>Mn>Se>Fe。核桃仁样品存在重金属Pb超过《食品安全国家标准 食品中污染物限量》（GB 2762—2022）中坚果及籽类安全限值（0.2 mg·kg-1）的情况，超标率为0.6%，但该核桃仁样品与其对应土壤样品中Pb无明显相关性。土壤样品中重金属 Pb、Cd、As、Cr、Hg超过风险筛选值的占比依次为 0、56.8%、18.2%、14.8%、1.1%，Cd和 As超过风险管制值的占比分别为10.8%和2.3%，迁移能力大小依次为Cd>Hg>Cr>Pb>As。核桃仁提供Cu和Mn的营养指数（INQ）均值大于2，单一重金属目标危害系数（THQ）和多种重金属元素危害指数（HI）均小于 1。研究表明，贵州核桃仁中矿质营养元素含量较高，可作为人体摄入 Cu和Mn的一种潜在膳食来源，且不会引起明显的重金属暴露风险。 |
| 英文摘要: |
| To investigate the migration characteristics of mineral nutrients and heavy metals in the soil-walnut kernel system, as well as the nutritional value and health risks of mineral elements in walnut kernels, this study determined the contents of mineral elements in 176 pairs of walnut kernels and their corresponding soil samples collected from 20 counties in Guizhou Province. The enrichment characteristics, nutritional value, and health risks of mineral elements in Guizhou walnut kernels were analyzed. Results showed that the average contents of Fe, Mn, Cu, Zn, Se in walnut kernels were 41.1, 81.4, 22.4, 32.5, 0.17 mg·kg-1, respectively, with migration capacities ordered as Cu> Zn>Mn>Se>Fe. Some walnut kernel samples exceeded the national standard the National Food Safety Standard—Maximum Levels of Contaminants in Foods（GB 2762—2022）safety limit for Pb in nuts and seeds（0.2 mg·kg-1）, with an over standard rate of 0.6%. However, no significant correlation was observed between Pb content in these walnut kernels and their corresponding soils. Among soil samples, the percentages exceeding risk screening values for Pb, Cd, As, Cr, Hg were 0, 56.8%, 18.2%, 14.8%, 1.1%, respectively. The proportions exceeding risk control values for Cd and As were 10.8% and 2.3%, with migration capacities ordered as Cd>Hg>Cr>Pb>As. The average nutritional index（INQ）values for Cu and Mn in walnut kernels exceeded 2, while both single-element target hazard quotients（THQ）and multi-element hazard indices（HI）for heavy metals were below 1. The study indicates that walnut kernels from Guizhou contain abundant mineral nutrients and can serve as a potential dietary source for human intake of Cu and Mn, without posing significant heavy metal exposure risks. |
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