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Benzotriazoles and benzothiazoles prevail in indoor dust from an E-waste dismantling area in South China: Elevated concentrations and implication for human exposure.
Science of the Total Environment ( IF 8.2 ) Pub Date : 2020-03-20 , DOI: 10.1016/j.scitotenv.2020.137979
Wenzheng Li 1 , Juan Li 1 , Man Deng 1 , Yanan Pan 1 , Lixi Zeng 1
Affiliation  

In this study, 6 BTRs and 9 BTHs were detected in indoor dust samples collected from a typical e-waste dismantling area and adjacent residential areas, as well as from a control urban area. The median ∑BTRs (the total concentrations of BTRs) in e-waste dismantling workshop dust (3830 ng/g) was up to about 21 and 17 times higher than those in the local residential house dust (180 ng/g) and the control urban residential house dust (231 ng/g), respectively. Similarly, significantly higher ∑BTHs (the total concentrations of BTHs) were also found in indoor dust from e-waste workshops (median: 2070 ng/g; range: 590-4430 ng/g) compared to the local residential houses (823 ng/g; 268-3350 ng/g) and the control urban residential houses (930 ng/g; 400-3650 ng/g). These results indicate that e-waste dismantling activities contribute to considerable residues of BTRs and BTHs in indoor dust. Benzotriazole (BTR), benzothiazole (BTH) and 2-hydroxy-benzothiazole (2-OH-BTH) were identified as the predominant compounds across three types of dust samples, cumulatively representing over 80% of ∑BTs (the sum of ∑BTRs and ∑BTHs). The different applications of BTRs and BTHs in e-products were clarified based on correlations analysis. The estimated daily intakes (EDIs) of BTRs and BTHs through dust intake for occupational workers were much higher than those for local and urban residents, implying that a potentially high risk can be posed to occupational workers.

中文翻译:

苯并三唑和苯并噻唑在华南电子废物拆解区的室内灰尘中普遍存在:浓度升高及其对人体的影响。

在这项研究中,在从典型的电子废物拆解区和邻近居民区以及从对照市区收集的室内灰尘样品中检测到6个BTR和9个BTH。电子废物拆解车间粉尘(3830 ng / g)的中位数∑BTRs(BTRs的总浓度)分别比当地住宅粉尘(180 ng / g)和对照的中位数分别高21到17倍城市居民住宅粉尘(231 ng / g)。同样,与当地居民住宅(823 ng)相比,在电子废物车间的室内灰尘中也发现明显更高的ΣBTH(BTH的总浓度)(中位数:2070 ng / g;范围:590-4430 ng / g)。 / g; 268-3350 ng / g)和对照城市居民住宅(930 ng / g; 400-3650 ng / g)。这些结果表明,电子废物的分解活动会导致室内灰尘中大量的BTR和BTH残留。苯并三唑(BTR),苯并噻唑(BTH)和2-羟基-苯并噻唑(2-OH-BTH)被确定为三种粉尘样品中的主要化合物,累计占∑BT的80%以上(∑BTR和∑BTH)。基于相关性分析,阐明了BTR和BTH在电子产品中的不同应用。估计职业工人通过粉尘摄入的BTR和BTH的每日摄入量(EDI)远远高于本地和城市居民,这意味着职业工人可能面临潜在的高风险。在三种类型的粉尘样品中,苯并噻唑(BTH)和2-羟基-苯并噻唑(2-OH-BTH)被确定为主要化合物,累计代表了超过80%的∑BT(∑BTR和∑BTH的总和)。基于相关性分析,阐明了BTR和BTH在电子产品中的不同应用。估计职业工人通过粉尘摄入的BTR和BTH的每日摄入量(EDI)远远高于本地和城市居民,这意味着职业工人可能面临潜在的高风险。在三种类型的粉尘样品中,苯并噻唑(BTH)和2-羟基-苯并噻唑(2-OH-BTH)被确定为主要化合物,累计代表了超过80%的∑BT(∑BTR和∑BTH的总和)。基于相关性分析,阐明了BTR和BTH在电子产品中的不同应用。估计职业工人通过灰尘摄入的BTR和BTH的每日摄入量(EDI)远远高于本地和城市居民,这意味着职业工人可能面临潜在的高风险。
更新日期:2020-03-20
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