臭氧化阶段溴酸盐生成影响因素的响应面研究

Studying factors influencing bromate’s forming during ozonation by response surface method

采用响应面方法,对臭氧化过程中BrO3-和其他含溴类物质(HOBr/OBr-)生成的主要影响因素进行分析.结果表明:降低初始溴离子(Br-)质量浓度、臭氧投加量、接触时间或pH值均可减少BrO3-生成量;自由溴生成含量亦受Br-质量浓度、臭氧投加量和pH的显著影响,而接触时间对其影响则不明显;当初始Br-质量浓度小于300μg/L时,降低臭氧投加量对BrO3-生成影响最大,可使其生成量降低达80%;当初始Br-质量浓度大于300μg/L时,pH调节则最多可降低50%的BrO3-生成,同时可使相对臭氧投加量降低.

Major factors affecting the formation of BROW- and other bromine （HOBr/OBr） were investigated in a laboratory by the response surface method. The results show that decreasing initial bromide （Br^-） concentration, ozone dosage, contact time or pH all can reduce the BrO3^- formation amount. Except the contact time, the other factors also have significant effects on the bromine concentration. When the initial Br- concentration is lower than 300 μg/L, the ozone dosage decrease is the most significant impact on the generated BrO/, which can be reduced by up to 80%. When the Br^- concentration is above 300 μg/L, pH adjustment can reduce the BrOg amount of 50% and the relative amount of ozone dosage.