【摘要】 以二氧化钛为光催化剂 ,研究了废水的pH值、铬酸根离子的初始浓度、催化剂的用量、催化反应时间等因素对含铬废水中铬酸根离子降解率的影响。结果表明 ,在pH值 =2 .5时光催化反应速度最快 ,随着催化剂用量的增加 ,反应速度加快 ,催化反应时间延长 ,降解率增加 ,只要反应时间足够 ,铬酸根离子的初始浓度对过程影响不大。更多还原

【Abstract】 The influences of the pH,the virgin concentration of Cr(Ⅵ),the amount of catalyst and reaction time on Cr(Ⅵ)of waste water using nanometer titania were studied. When the pH of waste water was 2.5, the speed of light-catalyzed reaction was the quickest. When increasing the amount of catalyst, the speed was quicker and increasing the time of light-catalyzed reaction, the degradation rate was larger. As long as the time was enough, the virgin concentration of Cr(Ⅵ) of waste water was nothing with the reaction process.更多还原