可见光催化剂BiVO_4 降解废水中直接耐酸大红4BS

以直接耐酸大红4BS模拟染料废水为目标污染物,研究了BiVO_4对直接耐酸大红4BS(简称4BS)的吸附效果以及废水初始质量浓度、废水pH和BiVO_4的加入量对光催化降解效果的影响.实验结果表明:当废水初始质量浓度为40 mg/L、废水pH为6.38、BiVO_4加入量为1.0 g/L时,4BS的降解率可达98.9%;BiVO_4重复使用5次后4BS的降解率可达80.0%以上;COD的变化趋势说明4BS被催化剂吸附和光催化降解的过程是循序渐进的.

Degradation of Direct Acid Proof Scarlet 4BS in Wastewater by Photocatalyst BiVO_4 under Visible Light

Using the simulated dye wastewater, the adsorption effect of direct acid proof scarlet 4BS on BiVO_4 was studied, and the effects of the wastewater initial mass concentration, the wastewater pH and the BiVO_4 dosage on the photocatalytic degradation were investigated. The experimental results show that: The degradation rate of 4BS is 98.9% when its initial mass concentration is 40 mg/L, the wastewater pH is 6.38 and the BiVO_4 dosage is 1.0 g/L; After the BiVO_4 is reused for 5 times, the degradation rate of 4BS is still over 80.0%; The varying of COD incarnates that the adsorption and photocatalytic degradation of 4BS on the photocatalyst BiVO_4 are progressive and gradual.