Key Laboratory of Regional Environment and Eco-Remediation of Ministry of Education, College of Environment, Shenyang University, Shenyang, 110044, China.
Key Laboratory of Regional Environment and Eco-Remediation of Ministry of Education, College of Environment, Shenyang University, Shenyang, 110044, China.
Chemosphere. 2020 Jul;250:126297. doi: 10.1016/j.chemosphere.2020.126297. Epub 2020 Feb 21.
A total of 24 surface sediment samples were collected from Liao River, Northeast China. The concentration, spatial distribution, potential source, and ecological risk of 13 organophosphate esters (OPEs) flame retardants and plasticizers were analyzed. The total concentrations of OPEs varied considerably, ranging from 19.7 to 234 ng g dry weight (dw), with the mean concentrations of 64.2 ± 52.2 ng g dw. The OPEs pollution was increasing from upstream to downstream of Liao River. Compared with other sediments of rivers and lakes all over the world, Liao River has been seriously contaminated by OPEs, especially tributyl phosphate (TNBP) and tri-butoxyethyl phosphate (TBOEP). TNBP was the most abundant OPEs, followed by TBOEP and triphenylphosphine oxide. Their mean relative contributions were 26.3%, 12.4% and 11.6%, respectively. Positive matrix factorization indicated that OPEs in sediments from Liao River might be derived from plastic, textile, and polyurethane foam, anti-foam agent, hydraulic fluids, and coatings, indoor release, and chemical process emission. The risk of potential adverse effects of each individually OPEs on aquatic organisms were low (risk quotient less than 0.1). 2-Ethylhexyl diphenyl phosphate was the main substance causing risk.
共采集了中国东北辽河流域的 24 个表层沉积物样品。分析了 13 种有机磷酸酯（OPEs）阻燃剂和增塑剂的浓度、空间分布、潜在来源和生态风险。OPEs 的总浓度差异很大，范围为 19.7 至 234 ng/g 干重（dw），平均值为 64.2 ± 52.2 ng/g dw。OPEs 污染从辽河流域的上游到下游逐渐增加。与世界其他河流和湖泊的沉积物相比，辽河流域已受到 OPEs 的严重污染，尤其是磷酸三丁酯（TNBP）和三丁氧基乙基磷酸酯（TBOEP）。TNBP 是最丰富的 OPEs，其次是 TBOEP 和三苯基氧化膦。它们的平均相对贡献率分别为 26.3%、12.4%和 11.6%。正定矩阵因子分析表明，辽河流域沉积物中的 OPEs 可能来自塑料、纺织品和聚氨酯泡沫、消泡剂、液压油和涂料、室内排放以及化学工艺排放。每种单独的 OPEs 对水生生物产生潜在不利影响的风险较低（风险商数小于 0.1）。2-乙基己基二苯基磷酸酯是引起风险的主要物质。
