过碳酸钠降解水相中罗丹明B的实验研究

以水相中的罗丹明B为研究对象,考察了不同条件下过碳酸钠对罗丹明B染料废水的降解作用。结果表明:在一定浓度范围内,过碳酸钠初始浓度与罗丹明B去除速率呈正相关性。碱性和加温能加快反应速率,当温度超过35℃时,罗丹明B褪色率达到90%以上只需要30min。实验还考察了MnO2和254nm的紫外灯对反应的催化作用,结果表明,254nm的紫外灯其能有效的加快反应的进行。

STUDY ON THE DEGRADATION OF RHODAMINE B BY SODIUM PERCARBONATE

The degradation of rhodamine B by sodium percarbonate was investigated under different conditions.The results show that higher initial concentration of sodium percarbonate increase the removal rate of the rhodamine B,but when sodium percarbonate concentration of more than 4.0 g/L,the rate increase is not obvious.Alkaline conditions and temperature rise can accelerate the reaction,experiments show that when the temperature exceeds 35℃,the rhodamine B fade rate of 90% takes only 30 min.The catalytic effect of MnO2 and 254 nm UV lamp on the reaction is also investigated,results show that 254 nm UV lamp can effectively accelerate the reaction.