活性碳纤维活化过一硫酸盐深度处理焦化废水

Advanced treatment of coking wastewater with peroxymonosulfate activated by activated carbon fiber

采用活性碳纤维(ACF)活化过一硫酸盐(PMS)深度处理焦化废水生化出水。采用单因素实验考察了PMS浓度、ACF质量浓度和初始pH对焦化废水生化出水中的COD和色度去除效果的影响,并采用响应面法优化了反应条件。实验结果表明,在PMS浓度为18.3 mmol/L、ACF质量浓度为4.2 g/L、初始pH为5.3的条件下,焦化废水生化出水中COD和色度去除率分别为85.3%和92.0%。ACF可有效吸附水中污染物,ACF表面起到催化作用的活性点位是碱性官能团,且经过4次重复使用对焦化废水仍能保持一定的处理能力。三维荧光光谱分析结果表明,ACF-PMS体系可有效去除水中的类富里酸和类腐殖酸物质,并降解大部分芳香蛋白类物质。

The advanced treatment of coking wastewater biochemical effluent was carried out using peroxymonosulfate (PMS) activated by activated carbon fiber (ACF).The effects of PMS concentration,ACF mass concentration and the initial pH on removal of COD and chroma of the coking wastewater biochemical effluent were investigated by single factor experiment,and the process conditions were optimized by response surface methodology.The experiment results show that under the optimal conditions of PMS concentration 18.3 mmol/L,ACF mass concentration 4.2 g/L and the initial pH 5.3,the removal rate of COD and chroma are 85.3% and 92.0%,respectively.ACF can effectively adsorb pollutants from water,and the active sites on the surface of ACF that play a catalytic role are basic functional groups.The ACF can maintain a certain treatment capacity on coking wastewater after 4 times of reuse.The results of three-dimensional fluorescence spectrum analysis present that fulvic acid-like and humic acid-like substances in wastewater can be effectively removed and most aromatic proteins can be degraded in the ACF-PMS system.