Wang Han, Miao Dongtian, Yu Yongjiang, Zhang Zhihan, Zhu Youlong, Wang Qing
Department of Toxicology, School of Public Health, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Sun Yat-sen University, Guangzhou 510080, China.
PCFM Lab, School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China.
iScience. 2023 Dec 15;27(1):108737. doi: 10.1016/j.isci.2023.108737. eCollection 2024 Jan 19.
Lead (Pb(II)) contamination is common in liquid foods and can result from Pb(II) being present in the raw materials or during handling processes. However, due to the complexity of food matrices, there is limited data available concerning Pb(II) ion removal from food sources. This study focused on fabricating a PVA/PAA/DMTD electrospun nanofibrous membrane (ENFM) to efficiently and selectively remove Pb(II) ions from liquid foods. The PVA/PAA/DMTD ENFM had a maximum adsorption capacity of 138.3 mg/g for Pb(II) ions and demonstrated high selectivity toward the removal of Pb(II) ions. Negative values of the Gibbs free energy (Δ°) showed that the spontaneous nature of the adsorption process was feasible at different temperatures. Moreover, it successfully removed Pb(II) ions from selected samples of commercially available drinks. Therefore, this adsorbent exhibits significant potential for removing Pb(II) ions from liquid food products, thereby reducing daily dietary exposure to Pb(II).
铅（Pb(II)）污染在液态食品中很常见，可能源于原材料中存在Pb(II)或在处理过程中产生。然而，由于食品基质的复杂性，关于从食物来源中去除Pb(II)离子的数据有限。本研究重点在于制备一种聚乙烯醇/聚丙烯酸/二甲基硫代氨基甲酸盐电纺纳米纤维膜（ENFM），以高效且选择性地从液态食品中去除Pb(II)离子。PVA/PAA/DMTD ENFM对Pb(II)离子的最大吸附容量为138.3 mg/g，并对去除Pb(II)离子表现出高选择性。吉布斯自由能（Δ°）的负值表明吸附过程的自发性在不同温度下是可行的。此外，它成功地从市售饮料的选定样品中去除了Pb(II)离子。因此，这种吸附剂在从液态食品产品中去除Pb(II)离子方面具有显著潜力，从而减少日常饮食中对Pb(II)的暴露。
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