A novel technology which combined electrochemical process catalyzed by manganese mineral with electro-assisted coagulation process was proposed in this study. The mineralization of organic pollutant from simulated dye...A novel technology which combined electrochemical process catalyzed by manganese mineral with electro-assisted coagulation process was proposed in this study. The mineralization of organic pollutant from simulated dye wastewater containing an azo dye Acid Red B（ARB） was experimentally investigated using this method. It was found that the manganese mineral could catalyze the electrochemical process dramatically. The TOC removal percentage of electrochemical treatment catalyzed by manganese mineral was 43.6% while the TOC removal percentage of the process using the manganese mineral alone and using the electrolysis alone were 9.3% and 20.8%, respectively. Moreover, it was found that combined electroxidation with electro-assisted coagulation process could more effectively eliminate ARB. After a period of 180 min electrooxidation and 300 min electroreduction, almost 66.9% of TOC was removed, and the dissolved Mn^2＋. could be effectivly removed. The effects of the order of oxidation and reduction, the proper ratio electrooxidation/reduction time, and current density on the removal efficiency were investigated in detail. In addition, a proposed mechanism of manganese-mineral-catalyzed electrooxidation-reduction process was discussed in this paper.展开更多
目的研究臭氧氧化技术处理酸性红B染料废水的效果,并探讨O3投加量、废水的初始pH值、H2O2和O3物质的量比对臭氧氧化处理酸性红B染料废水效果的影响.方法依据臭氧高级氧化的机理,在实验室反应器中通过实验考察在臭氧氧化处理酸性红B染料...目的研究臭氧氧化技术处理酸性红B染料废水的效果,并探讨O3投加量、废水的初始pH值、H2O2和O3物质的量比对臭氧氧化处理酸性红B染料废水效果的影响.方法依据臭氧高级氧化的机理,在实验室反应器中通过实验考察在臭氧氧化处理酸性红B染料废水过程中,控制不同的O3投加量、废水的初始pH值、H2O2和O3物质的量比对酸性红B染料废水的色度和COD去除率的影响.结果在pH=7的条件下,单一臭氧氧化30 m in时,废水的色度和COD去除率分别为99.5%和37.9%;而废水的初始pH值控制在11左右时,COD去除率有较大提高.O3/H2O2氧化工艺,适宜的H2O2和O3物质的量比为0.6,氧化处理30 m in废水的COD去除率可达53.5%.结论O3高级氧化能够有效降解酸性红B染料废水,在臭氧反应体系中投加H2O2可以明显提高降解速率,缩短处理时间,降低O3耗量.展开更多
文摘A novel technology which combined electrochemical process catalyzed by manganese mineral with electro-assisted coagulation process was proposed in this study. The mineralization of organic pollutant from simulated dye wastewater containing an azo dye Acid Red B（ARB） was experimentally investigated using this method. It was found that the manganese mineral could catalyze the electrochemical process dramatically. The TOC removal percentage of electrochemical treatment catalyzed by manganese mineral was 43.6% while the TOC removal percentage of the process using the manganese mineral alone and using the electrolysis alone were 9.3% and 20.8%, respectively. Moreover, it was found that combined electroxidation with electro-assisted coagulation process could more effectively eliminate ARB. After a period of 180 min electrooxidation and 300 min electroreduction, almost 66.9% of TOC was removed, and the dissolved Mn^2＋. could be effectivly removed. The effects of the order of oxidation and reduction, the proper ratio electrooxidation/reduction time, and current density on the removal efficiency were investigated in detail. In addition, a proposed mechanism of manganese-mineral-catalyzed electrooxidation-reduction process was discussed in this paper.
文摘目的研究臭氧氧化技术处理酸性红B染料废水的效果,并探讨O3投加量、废水的初始pH值、H2O2和O3物质的量比对臭氧氧化处理酸性红B染料废水效果的影响.方法依据臭氧高级氧化的机理,在实验室反应器中通过实验考察在臭氧氧化处理酸性红B染料废水过程中,控制不同的O3投加量、废水的初始pH值、H2O2和O3物质的量比对酸性红B染料废水的色度和COD去除率的影响.结果在pH=7的条件下,单一臭氧氧化30 m in时,废水的色度和COD去除率分别为99.5%和37.9%;而废水的初始pH值控制在11左右时,COD去除率有较大提高.O3/H2O2氧化工艺,适宜的H2O2和O3物质的量比为0.6,氧化处理30 m in废水的COD去除率可达53.5%.结论O3高级氧化能够有效降解酸性红B染料废水,在臭氧反应体系中投加H2O2可以明显提高降解速率,缩短处理时间,降低O3耗量.
