Occurrence, distribution a and human exposure of several endocrine disrupting chemicals in indoor dust: A nationwide study


Parabens, triclosan (TCS), triclocarban (TCC), and bisphenol A and its analogues (BPs) are used in various industrial and consumer products and typical endocrine disrupting chemicals (EDCs). In this study, six parabens, TCS, TCC, and eight BPs were determined in 289 indoor dusts collected from different geographical regions, China. Ten of 16 target compounds were found in >50% samples. Concentrations of ∑6parabens, ∑(TCS+TCC), and ∑8BPs in indoor dust ranged from 8.66-21,500 (median: 288), 19.6-8,940 (104), and 8.80-37,400 (377) ng/g dw, respectively. The ∑(TCS+TCC) concentrations in dust from Northeast China were higher than those from Central South China (p <0.05). The concentrations of ∑8BPs found in dust from Eastern China were approximately 2 times higher than those found for North China (p <0.05), whereas there was no significant spatial difference in concentrations of parabens among different geographical regions (p >0.05). Human exposure to these EDCs through indoor dust ingestion and dermal absorption was evaluated. The median and 95th percentile estimated daily intakes of ∑16EDCs ranged from 0.439 (adults)-4.57 (infants) and 6.26 (adults)-62.1 (infants) ng/kg bw/day, respectively, generally decreasing with increasing age. This nationwide survey establishes a baseline concentration for parabens in the indoor environment in China.

Authors: Qingqing Zhu, Mei Wang, Jiabao Jia, Yu Hu, Xin Wang, Chunyang Liao, Guibin Jiang
; Full Source: Environmental science & technology 2020 Aug 17. doi: 10.1021/acs.est.0c04299.