改性氧化铝微波诱导氧化处理雅格素蓝BFBR染料废水的研究

Microwave induced oxidation process for Argazol Blue BF-BR wastewater treatment with modified alumina as catalyst

采用微波诱导氧化工艺(MIOP)技术,以改性氧化铝为催化剂,对雅格素蓝BF BR染料模拟废水进行氧化处理.优化了处理工艺条件,实验在固液质量比为1∶10(50mL雅格素蓝BF BR水溶液中投加5 0g改性氧化铝)、微波功率为400W的条件下微波辐照处理5min.在此工艺条件下,对水中雅格素蓝BF BR的脱色率可达到98%,COD去除率为87 4%.改性氧化铝在重复使用9次后仍能保持很高的脱色率.进一步研究表明在微波辐射场中废水中的有机污染物在改性氧化铝表面通过吸附 氧化协同作用而被迅速降解.反应动力学研究表明,该氧化过程符合一级反应动力学规律,反应速率常数k=0 995min-1,反应半衰期t1 2=0 697min.实验结果显示,在本实验中改性氧化铝比颗粒活性炭具有更高的催化活性.

Argazol Blue BF wastewater was treated by microwave induced oxidation process(MIOP) with modified Al_2O_3 as a catalyst. Under the optimum condition that the solid/liquid ratio was 1∶10(5.0?g modified Al_2O_3 mixed with 50?mL BF-BR 150% solution), microwave power was 400?W, and the time of the irradiation was 5?min, the decolorization rate could come up to 98% and COD removal rate reached up to 87.4%. The catalyst could be reused more than 9 times remaining the high rate of the dye removal. And further investigation showed that Argazol Blue BF was degraded by microwave on the surface of catalyst with the chemical reaction mechanism of surface adsorption and microwave induced oxidation. Kinetics study indicated that the treatment process accorded with the first order reaction kinetic, the reaction velocity constant k was 0.995?min^(-1), the half\|life t_(1/2) was 0.697?min. The result showed that the modified Al_2O_3 used in this experiment was more effective than GAC that was usually used as catalyst in MIOP.