State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Life Science, Shanxi University, Taiyuan, Shanxi 030006, China.
Sci Total Environ. 2019 Mar 15;656:862-869. doi: 10.1016/j.scitotenv.2018.11.458. Epub 2018 Nov 30.
The occurrence and fate of nine phthalate esters (PAEs), including dimethyl phthalate (DMP), diethyl phthalate (DEP), di‑n‑butyl phthalate (DBP), di-isobutyl phthalate (DIBP), benzyl butyl phthalate (BzBP), di (2‑ethylhexyl) phthalate (DEHP), di‑n‑hexyl phthalate (DNHP), dicyclohexyl phthalate (DCHP), and di‑n‑octyl phthalate (DNOP), in sludges collected from 46 wastewater treatment plants (WWTPs) from 22 Chinese provinces were investigated. The nine PAEs were detected in almost all the sludge samples. DEHP was the most abundant congener in all sludge samples, followed by DBP and DIBP. The DEHP concentrations in sludge were in the range of 0.326-67.8 (mean: 14.7) μg/g dry weight (dw), which were at the lower bound or middle of the concentration range of DEHP in sludge globally (0.0200-3514 μg/g dw). Spatial distribution and mass loading of PAEs in WWTPs were investigated. The concentrations of ΣPAEs in sludges from different provinces were in the order as follows: Jilin (40.2 μg/g dw) > Liaoning (38.9 μg/g dw) > Beijing (30.7 μg/g dw), while the mass loading of ∑PAEs in sludges were Guangdong (10.1 tons/yr) > Liaoning (9.97 tons/yr) > Shandong (5.59 tons/yr). Our study showed that the geographical distribution of PAEs in sludges was similar to that in indoor dusts found in earlier study, suggesting the existence of a common source for these chemicals in both matrices. Based on the concentrations measured, human exposure to PAEs through sludge application in soil was evaluated and the exposure dose is minor.
研究了来自中国 22 个省份的 46 家污水处理厂（WWTP）采集的污泥中 9 种邻苯二甲酸酯（PAEs）的含量和归宿。几乎所有的污泥样本中都检测到了这 9 种 PAEs。在所有污泥样本中，DEHP 是最丰富的同系物，其次是 DBP 和 DIBP。污泥中 DEHP 的浓度范围为 0.326-67.8（平均值：14.7）μg/g 干重（dw），处于全球污泥中 DEHP 浓度范围的低端或中端（0.0200-3514μg/g dw）。研究了 WWTP 中 PAEs 的空间分布和质量负荷。不同省份污泥中 ΣPAEs 的浓度顺序为：吉林（40.2μg/g dw）>辽宁（38.9μg/g dw）>北京（30.7μg/g dw），而污泥中 ΣPAEs 的质量负荷为：广东（10.1 吨/年）>辽宁（9.97 吨/年）>山东（5.59 吨/年）。我们的研究表明，污泥中 PAEs 的地理分布与早期研究中室内灰尘中的分布相似，表明这两种基质中这些化学物质存在共同的来源。基于所测量的浓度，评估了通过将污泥应用于土壤中人类接触 PAEs 的情况，结果表明暴露剂量很小。
