State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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.
Sci Total Environ. 2022 Feb 1;806(Pt 4):150966. doi: 10.1016/j.scitotenv.2021.150966. Epub 2021 Oct 15.
A total of 96 water, soil, and sediment samples, collected from 32 sampling sites in the Yangtze River Delta (YRD) region, were analyzed for 9 phthalate esters (PAEs). The sum concentrations of 9 PAEs (∑PAEs) in the water, soil, and sediment samples were 2.23-6.30 μg L (mean: 4.11 μg L), 155-1410 μg kg (408 μg kg), and 30.1-16,000 μg kg (1200 μg kg), respectively. Among the 9 PAEs, di-n-butyl phthalate (DBP), bis(2-ethylhexyl) phthalate (DEHP), and di-isobutyl phthalate (DIBP) are the predominant congeners in the YRD region. DBP was the dominant PAE congener in water, accounting for 50.6% of the ΣPAEs, while DEHP was the predominant one in soil and sediment (accounting for 69.6% and 83.1% of the ΣPAEs, respectively). Soil and sediment samples collected from Wuxi city manifested relatively higher PAE concentrations. The partitioning of PAEs between water and sediment was attributed to the fact that low molecular weight PAEs (e.g., dimethyl phthalate (DMP) and diethyl phthalate (DEP)) were dominant in water, medium molecular weight PAEs (e.g., BzBP) were close to the equilibrium between sediment-water, and high molecular weight PAEs (e.g., DEHP) were more prevalent in sediment. The ecological risk assessment of PAEs in the surface water showed that the potential environmental risks followed the order of DEHP > DIBP > DBP > DMP > DEP. Comparatively, DEHP posed high ecological risk to sensitive algae, crustaceans and fish, while DMP and DEP exhibited low risk. In the sediment, DIBP exhibited a high risk to the sensitive fish, whereas DMP, DEP, DBP and DEHP displayed no risk.
共采集了长三角地区（YRD）32 个采样点的 96 个水、土、沉积物样品，分析了 9 种邻苯二甲酸酯（PAEs）。水、土壤和沉积物样品中 9 种邻苯二甲酸酯的总浓度（∑PAEs）分别为 2.23-6.30μg/L（平均值：4.11μg/L）、155-1410μg/kg（408μg/kg）和 30.1-16000μg/kg（1200μg/kg）。在 9 种邻苯二甲酸酯中，邻苯二甲酸二丁酯（DBP）、邻苯二甲酸二（2-乙基己基）酯（DEHP）和邻苯二甲酸二异丁酯（DIBP）是 YRD 地区的主要同系物。DBP 是水中的主要邻苯二甲酸酯同系物，占 ΣPAEs 的 50.6%，而 DEHP 是土壤和沉积物中的主要同系物（分别占 ΣPAEs 的 69.6%和 83.1%）。来自无锡市的土壤和沉积物样品显示出相对较高的 PAE 浓度。PAEs 在水和沉积物之间的分配是由于低分子量 PAEs（例如，邻苯二甲酸二甲酯（DMP）和邻苯二甲酸二乙酯（DEP））在水中占主导地位，中分子量 PAEs（例如，BzBP）在水-沉积物之间接近平衡，而高分子量 PAEs（例如，DEHP）则更普遍存在于沉积物中。对地表水 PAEs 的生态风险评估表明，潜在环境风险的顺序为 DEHP>DIBP>DBP>DMP>DEP。相对而言，DEHP 对敏感藻类、甲壳类动物和鱼类构成高生态风险，而 DMP 和 DEP 则风险较低。在沉积物中，DIBP 对敏感鱼类表现出高风险，而 DMP、DEP、DBP 和 DEHP 则没有风险。
