CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Department of Chemistry, University of Gujrat, Gujrat, 50700, Pakistan.
CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; University of Chinese Academy of Sciences, Beijing, 100043, China.
Chemosphere. 2018 Aug;204:170-177. doi: 10.1016/j.chemosphere.2018.04.028. Epub 2018 Apr 6.
We investigated the occurrence, removal and mass balance of 8 endocrine disrupting compounds (EDCs), including estrone (E1), estradiol (E2), estriol (E3), ethinylestradiol (EE2), triclosan (TCS), triclocarbon (TCC), 4-n-nonyl phenol (NP) and 4-n-octyl phenol (OP), along with 5 of their transformation products (TPs), including 4-hydroxy estrone (4-OH E1), 4-hydroxy estradiol (4-OH E2), methyl triclosan (MeTCS), carbanilide (NCC), dichlorocarbanilide (DCC) in a wastewater treatment plant. Generally, E3 showed the highest concentrations in wastewater with median value of 514 ng/L in influent, while TCS and TCC showed highest level in sludge and suspended solids (SS) with median value of 960 and 724 μg/kg, respectively. Spatial variations were observed along each unit of the wastewater treatment processes for dissolved analytes in wastewater and adsorbed analytes in suspended solids and sludge. Special emphasis was placed to understand the mass load of EDCs and their TPs to the wastewater treatment unit and mass loss during the wastewater treatment processes. Mass loss based on both aqueous and suspended phase concentration revealed that majority of these chemicals were significantly removed during the treatment process except for TCS, TCC, and three of their TPs (MeTCS, NCC, DCC), which were released or generated during the treatment process. Mass load results showed that 42.4 g of these EDCs and their TPs entered this wastewater treatment system daily via influent, whereas 6.15 g and 7.60 g were discharged through effluent and sludge.
我们研究了 8 种内分泌干扰化合物（EDCs），包括雌酮（E1）、雌二醇（E2）、雌三醇（E3）、乙炔雌二醇（EE2）、三氯生（TCS）、三氯卡班（TCC）、4-壬基酚（NP）和 4-辛基酚（OP），以及它们的 5 种转化产物（TPs），包括 4-羟基雌酮（4-OH E1）、4-羟基雌二醇（4-OH E2）、甲基三氯生（MeTCS）、卡巴胂（NCC）、二氯卡巴胂（DCC），在一个污水处理厂。一般来说，E3 在废水中的浓度最高，进水浓度中位数为 514ng/L，而 TCS 和 TCC 在污泥和悬浮固体（SS）中的浓度最高，中位数分别为 960μg/kg 和 724μg/kg。在污水处理过程的每个单元中，都观察到了溶解在废水中的分析物和吸附在悬浮固体和污泥中的分析物的空间变化。特别强调了了解 EDCS 及其 TP 对污水处理单元的质量负荷以及在污水处理过程中的质量损失。基于水相和悬浮相浓度的质量损失表明，除了 TCS、TCC 及其三种 TP（MeTCS、NCC、DCC）在处理过程中释放或产生外，这些化学物质大部分在处理过程中被显著去除。质量负荷结果表明，每天有 42.4g 这些 EDCs 和它们的 TPs 通过进水进入这个污水处理系统，而 6.15g 和 7.60g 通过出水和污泥排出。
