State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Sci Total Environ. 2016 Feb 15;544:143-9. doi: 10.1016/j.scitotenv.2015.11.094. Epub 2015 Dec 3.
The occurrence and distribution of 14 organophosphate (OP) triesters and 5 diesters were investigated in sludge from eight sewage treatment plants (STPs) in Beijing, China, during 2008-2014. Tri(2-ethylhexyl) phosphate (TEHP) and tri-m-cresyl phosphate (TCrP) were the predominant triesters with the average concentration of 233-137 μg/kg, respectively. Also, the polar and hydrophilic trimethyl phosphate (TMP) and triethyl phosphate (TEP) were detected in 19% and 74% of sludge samples, respectively. Three of five diesters were detected in sludge samples, and di(2-ethylhexyl) phosphate (DEHP) revealed the highest average concentration of 96.0 μg/kg, followed by diphenyl phosphate (DPhP, 18.0 μg/kg). The levels of OP triesters in sludge varied with the compositions of the sewage and treatment capacity of STPs, as well as the adjacent sources. In comparison with that in the former years, relatively higher concentration of total OP triesters in sludge was observed in 2014, which is consistent with the rapid growth in consumption of these chemicals in China. Finally, environmental risk assessment indicated potential harmful effects of OP triesters on soil microorganisms after sludge landfill or fertilization.
2008-2014 年期间，研究人员调查了中国北京 8 家污水处理厂（STP）的污泥中 14 种有机磷酸酯（OP）三酯和 5 种二酯的出现和分布情况。三（2-乙基己基）磷酸酯（TEHP）和三邻甲苯基磷酸酯（TCrP）是主要的三酯，平均浓度分别为 233-137μg/kg。此外，极性和亲水性磷酸三甲酯（TMP）和磷酸三乙酯（TEP）分别在 19%和 74%的污泥样品中被检出。5 种二酯中有 3 种在污泥样品中被检出，其中二（2-乙基己基）磷酸酯（DEHP）的平均浓度最高，为 96.0μg/kg，其次是磷酸二苯酯（DPhP，18.0μg/kg）。污泥中 OP 三酯的水平随污水成分、STP 处理能力以及邻近污染源的不同而变化。与前些年相比，2014 年污泥中总 OP 三酯的浓度相对较高，这与中国这些化学品消费的快速增长是一致的。最后，环境风险评估表明，OP 三酯在污泥填埋或施肥后对土壤微生物可能产生有害影响。
