Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
Sci Total Environ. 2018 Jun 1;625:1156-1163. doi: 10.1016/j.scitotenv.2017.12.346. Epub 2018 Jan 12.
This study is the first attempt to comprehensively investigate deca-BDE and alternative flame retardants in a wastewater treatment plant in such a long term in China (2009-2016). Influent, effluent and sludge samples were collected. The mean concentration of deca-BDE, ΣNBFRs and ΣDPs in influent were 311.5, 76.0 and 1.4ng/L, respectively, which were at the low end of the global range. The levels of deca-BDE, ΣNBFRs and ΣDPs in effluent were range from 9.5-68.6, 4.1-38.5 and BLD-1.6ng/L, respectively. In sludge samples, the mean concentrations were 406.7, 510.5 and 6.9ng/g dw for deca-BDE, ΣNBFRs and ΣDPs. The concentration of temporal trends in this study may reflected the release of those compounds. Compared to the beginning year of this study, the usage of deca-BDE was decreased but the usage of total NBFRs and DPs presented sustained increase over the sampling period. There were no significant variation of deca-BDE, NBFRs and DPs in the wastewater treatment plant in Harbin was observed in the four seasons except for NBFRs in influents, which the ΣNBFRs mean concentration in influents in the summer was statistically significantly higher than that in winter indicating that NBFRs was easier impacted by temperature compared to deca-BDE and DPs. In addition, sorption and accumulation to sludge was the major removal mechanism for those compounds, accounting for 73.3% to 89.0%.
本研究首次在中国（2009-2016 年）的一家污水处理厂中对十溴联苯醚和替代型阻燃剂进行了如此长期的综合调查。采集了进水、出水和污泥样品。进水、出水和污泥中十溴联苯醚、∑NBFRs 和∑DPs 的平均浓度分别为 311.5、76.0 和 1.4ng/L，处于全球范围内的低水平。十溴联苯醚、∑NBFRs 和∑DPs 的浓度范围分别为 9.5-68.6、4.1-38.5 和 BLD-1.6ng/L。在污泥样品中，十溴联苯醚、∑NBFRs 和∑DPs 的浓度平均值分别为 406.7、510.5 和 6.9ng/g dw。本研究中时间趋势的浓度可能反映了这些化合物的释放。与本研究开始年份相比，十溴联苯醚的使用量有所减少，但总 NBFRs 和 DPs 的使用量在采样期间呈持续增加趋势。在哈尔滨污水处理厂，除进水 NBFRs 外，四个季节的十溴联苯醚、NBFRs 和 DPs 均未出现显著变化，夏季进水∑NBFRs 浓度明显高于冬季，表明 NBFRs 比十溴联苯醚和 DPs 更容易受温度影响。此外，吸附和积累到污泥是这些化合物的主要去除机制，占 73.3%至 89.0%。
