Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET, Tsinghua University, Beijing 100084, PR China.
Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET, Tsinghua University, Beijing 100084, PR China; Beijing Key Laboratory of Radioactive Wastes Treatment, Tsinghua University, Beijing 100084, PR China.
J Hazard Mater. 2017 Jan 5;321:639-646. doi: 10.1016/j.jhazmat.2016.09.053. Epub 2016 Sep 23.
Carbamazepine is an emerging contaminant and resistant to biodegradation, which cannot be effectively removed by the conventional biological wastewater treatment processes. In this study, the combined gamma irradiation and biodegradation was employed to remove carbamazepine from wastewater. The effect of dose on the removal of carbamazepine was studied at different doses (300, 600 and 800Gy). The results showed that the removal efficiency of carbamazepine increased with dose increasing during the irradiation process. The maximum removal efficiency was 99.8% at 800Gy, while the removal efficiency of total organic carbon (TOC) was only 26.5%. The removal efficiency of TOC increased to 79.3% after the sequent biological treatment. In addition, several intermediates and organic acids were detected. The possible degradation pathway of carbamazepine during the integrated irradiation and biodegradation was proposed. Based on the overall analysis, the combined gamma irradiation and biological treatment process can be an alternative for removing the recalcitrant organic pollutants such as carbamazepine from wastewater.
卡马西平是一种新兴的污染物，难以生物降解，不能被传统的生物废水处理工艺有效去除。在本研究中，采用γ辐照与生物降解相结合的方法去除废水中的卡马西平。研究了不同剂量（300、600 和 800Gy）对去除卡马西平的影响。结果表明，辐照过程中卡马西平的去除效率随剂量的增加而增加。在 800Gy 时，最大去除效率达到 99.8%，而总有机碳（TOC）的去除效率仅为 26.5%。随后的生物处理后，TOC 的去除效率提高到 79.3%。此外，还检测到几种中间产物和有机酸。提出了γ辐照与生物降解相结合去除卡马西平的可能途径。综合分析表明，γ辐照与生物处理相结合的工艺可以作为去除废水中卡马西平等难生物降解有机污染物的一种替代方法。
