文献类型：期刊文献

英文题名：Evaluation of risk levels of trace elements in walnuts from China and their influence factors: Planting area and cultivar

作者：Wu, Shutian[1] Shen, Danyu[1] Wang, Ruohui[1] Han, Yongxiang[1] Zheng, Yuewen[1] Ni, Zhanglin[1] Tang, Fubin[1] Mo, Runhong[1] Liu, Yihua[1]

第一作者：Wu, Shutian

通信作者：Mo, RH[1];Liu, YH[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Peoples R China

年份：2020

卷号：203

外文期刊名：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY

收录：;Scopus(收录号：2-s2.0-85087761647);WOS:【SCI-EXPANDED(收录号:WOS:000567045500001)】；

基金：This study was supported by the Fundamental Research Funds of CAF (CAFYBB2019QD002 and CAFYBB2017QC002). The author declares that there are no conflicts of interest.

语种：英文

外文关键词：Risk level; Geographical variation; Urbanization; Food security; Variety difference

摘要：The potential health risk of trace elements in nut foods has been widely concerned. The accumulations of trace elements by plants in the environment are disturbed by multiple factors. The objective of this work was to investigate the risk levels of trace elements in walnuts and their influence factors (planting area and cultivar). A total of 228 walnut samples were collected from four major walnut producing areas of China. The contents of essential elements for Fe, Cu, Zn, Mo and Se were 35.8, 21.9, 14.8, 0.3 and 0.04 mg/kg, respectively. The contribution of Cu for dietary reference intake was as high as 82.22%. The risk levels of potential toxicological elements and toxic elements within the acceptable limits. Significantly, the hazard quotients (HQs) of Ba and Co were up to 26.14% and 25.31%, respectively. The effect of planting area on trace elements was determined from the aspects of regional distribution and urbanization. Significant differences of essential elements were found between northeast and northwest areas. The urbanization directly influenced toxic elements, which could cause variation up to 85.0% (Pb) and 42.9% (As). Finally, cultivar effect was confirmed that all walnut cultivars were divided into four categories with different trace element characteristics.