Fe‒Beta分子筛类Fenton降解罗丹明B染料废水

Fenton-like Degradation of Rhodamine B Dyeing Wastewater with Fe-Beta Zeolite

摘要:

考察了类Fenton体系中初始pH值、H2O2投加量、Fe?Beta分子筛投加量、温度、无机盐离子浓度等因素对罗丹明B溶液脱色率的影响，并对Fe?Beta分子筛的回用进行研究。结果表明,对100 mL的100 mg?L-1罗丹明B溶液，初始pH值为3.0，H2O2投加量为0.4 mL，Fe?Beta分子筛投加量为30 mg，在70 ℃下反应2 h后罗丹明B溶液的脱色率可达95%；Fe?Beta分子筛经5次回用后罗丹明B溶液脱色率仍维持在80%以上。最后用实际染料废水进行了验证。对30 mL原水，H2O2投加量为10%（体积比），Fe?Beta分子筛投加量为80 mg，200 ℃下反应2 h后罗丹明B溶液脱色率可达96%。

Abstract:

The effects of initial pH, H2O2 dosage, Fe-Beta zeolite dosage, temperature and inorganic salt ion concentration on the decolorization rate of Rhodamine B solution in Fenton-like system and the reuse of the Fe-Beta zeolite were discussed. The results show that for the degradation of 100 mL of 100 mg?L-1 Rhodamine B solution, with the initial pH 3.0, H2O2 dosage 0.4 mL and Fe-Beta zeolite dosage 30 mg, after 2 h reaction at 70 ℃, the degradation rate can reach 95%. The recycling rate was high as the degradation rate remained above 80% after 5 times of reuse. Finally, the catalytic degradation of actual dyeing wastewater was investigated. For 30 mL original solution, with H2O2 dosage 10%（volume ratio） and Fe-Beta zeolite dosage 80 mg, after 2 h reaction at 200 ℃, the decolorization rate can reach 96%.