Mercury contents and potential exposure risk of rice-containing food products  

作　　者：Xin Wang Yingjun Wang Yaqi Zhang Ziyan Liu Xiaomeng Ji Yong Cai 

机构地区：[1]Shandong Key Laboratory of Environmental Processes and Health,School of Environmental Science and Engineering,Shandong University,Qingdao 266237,China [2]Department of Chemistry&Biochemistry,Florida International University,Miami,FL 33199,USA

出　　处：《Journal of Environmental Sciences》2025年第2期683-690,共8页环境科学学报(英文版)

基　　金：supported by the Shandong Provincial Natural Science Foundation (No.ZR2022QB242);the National Natural Science Foundation of China (No.22306111 and 22306108);the Shandong Provincial Natural Science Foundation (No.ZR2020ZD20);the Chinese Postdoctoral Science Foundation (No.2023M732059).

摘　　要：Mercury(Hg),especially methylmercury(MeHg),accumulation in rice grain due to rice paddy possessing conditions conducive to Hg methylation has led to human Hg exposure through consumption of rice-based daily meals.In addition to being a food staple,rice is widely used as a raw material to produce a vast variety of processed food products.Little is known about Hg levels in snacking rice-food products and potential Hg exposure from consumption of them,besides previous studies on infant rice cereals.Aiming to provide complementary information for a more complete assessment on Hg exposure risk originated from Hgcontaining rice,this study determined total Hg(THg)and MeHg levels in 195 rice-containing and rice-free processed food products covering all major types of snack foods marketed in China and the estimated daily intake(EDI)of dietary Hg from the consumption of these foods.The results clearly showed THg and MeHg contents in rice-containing foods were significantly higher than rice-free products,suggesting the transfer of Hg and MeHg from the rice to the end products,even after manufacturing processes.Moreover,significant positive correlations were observed between THg,MeHg,or MeHg/THg ratio and rice content for samples containing multiple grains as ingredients,further indicating the deciding role of rice for Hg levels in the end food products.Although the EDI of THg and MeHg via ricebased food products were relatively low compared to the reference dose,it should be considered these snacking food products would contribute additive Hg intake outside of the daily regular meals.

关 键 词：MERCURY METHYLMERCURY Processed food products RICE Dietary exposure 

分 类 号：X505[环境科学与工程—环境工程] X820.4