Steam disinfection enhances bioaccessibility of metallic nanoparticles in nano-enabled silicone-rubber baby bottle teats,pacifiers,and teethers  

作　　者：Yu Su BinWang Xin Tong Shuchuan Peng Sijin Liu Baoshan Xing Rong Ji 

机构地区：[1]State Key Laboratory of Pollution Control and Resource Reuse,School of the Environment,Nanjing University,Nanjing 210023,China [2]School of Resources and Environmental Engineering,Hefei University of Technology,Hefei 230009,China [3]State Key Laboratory of Environmental Chemistry and Ecotoxicology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [4]Stockbridge School of Agriculture,University of Massachusetts,Amherst,MA 01003,USA

出　　处：《Journal of Environmental Sciences》2024年第2期161-171,共11页环境科学学报（英文版）

基　　金：supported by the Key-Area Research and Development Program of Guangdong Province (No.2020B1111380003);the National Natural Science Foundation of China (Nos.42177377 and 31861133003)。

摘　　要：Nano-enabled silicone-rubber articles for feeding or chewing could be a source of metallic nanoparticles(NPs)directly exposed to infants and young children.However,the impact of steam disinfection on release of NPs and the related potential risks to children's health are unknown.Here,we investigated contents and form of Ag and Zn in 57 nano-enabled silicone-rubber baby bottle teats,pacifiers,and teethers of seven countries and examined the impacts of steam disinfection on in vitro bioaccessibility(IVBA)of Ag and Zn in the articles.Nearly 89%articles had a mixture of Ag-and Zn-containing NPs and the teethers had relatively high Ag and Zn contents(up to 501 and 254μg/g,respectively).Steam disinfection caused rubber decomposition into micro(nano)plastics(0.54-15.7μm)and NP release from the interior of bulk rubber and micro-sized plastics,thus enhancing the IVBA of Ag and Zn by up to 5.5 times.The findings provide insights into mechanisms for NP release by steam disinfection.Though oral exposure risk assessment suggested low health concerns on individual metal release,our study points out the need to assess the potential health risks of child co-exposure to metallic NPs and micro(nano)plastics.

关 键 词：Silicone rubber Metallic nanoparticles Micro(nano)plastics BIOACCESSIBILITY Children's health 

分 类 号：X820.4[环境科学与工程—环境工程]