Direct evidence on occurrence of emerging liquid crystal monomers in human serum from E-waste dismantling workers: Implication for intake assessment

文献类型： 外文期刊

第一作者： Li, Yuhe

作者： Li, Yuhe;Cheng, Zhipeng;Yang, Ming;Zhao, Leicheng;Zhang, Shaohan;Lu, Yuan;Sun, Hongwen;Wang, Lei;Zhang, Tao;Zhang, Qianru

作者机构：

关键词： Liquid crystal monomers; Internal exposure; E -waste dismantling; Serum; Occupational workers

期刊名称：ENVIRONMENT INTERNATIONAL （ 影响因子：13.352； 五年影响因子：13.238 ）

ISSN： 0160-4120

年卷期： 2022 年 169 卷

页码：

收录情况： SCI

摘要： Liquid crystal monomers (LCMs) are widely used chemicals and ubiquitous emerging organic pollutants in the environment, some of which have persistent, bio-accumulative, and toxic potentials. Elevated levels of LCMs have been found in the e-waste dismantling associated areas. However, information on their internal exposure bio-monitoring is scarce. For the first time, occurrences of LCMs were observed in the serum samples of occu-pational workers (n = 85) from an e-waste dismantling area in South China. Twenty-nine LCMs were detected in serum samples of the workers, with a median value of 35.2 ng/mL (range: 7.78-276 ng/mL). Eight noticed LCMs were found to have relatively high detection frequencies ranging from 52.9% to 96.5%. The correlation analysis of individual LCMs indicated potential common applications and similar sources to the LCMs in occupational workers. Fluorinated LCMs were identified as the predominant monomers in the workers. Additionally, the estimated daily intake of the LCMs in the occupational workers was significantly higher than those in residents from the reference areas (p < 0.05, Mann-Whitney U Test, median values: 1.46 ng/kg bw/day versus 0.40 ng/kg bw/day), indicating a substantially higher exposure level to e-waste dismantling workers.

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