摘要：

研究了非均相催化剂在低温低压条件下处理焦化废水的效果，通过改变催化剂的载体、浸渍溶液的种类及浓度、pH值、反应时间、催化剂的投加量、H₂O₂(质量分数30%)的投加量等因素，得出在低温低压下非均相催化氧化处理焦化废水的最佳条件:采用经Cu(NO₃)₂溶液浸渍后的γ-Al₂O₃为催化剂、在pH值为3、催化剂体积分数为40%、H₂O₂投加体积分数为4%、反应时间在3h以上时处理效果较好。原水COD_Cr由4540mg/L降至600mg/L以下，氨氮由552mg/L降至160mg/L以下。

关键词: 非均相催化氧化, 三氧化二铝, 焦化废水

Abstract:

The removal of COD_Cr and NH4+-N of coking wastewater by the heterogeneous catalytic oxidation under low temperature and pressure has been studied. We got optimal conditions by changing the carrier of catalyst, kinds and concentration of impregnating solution, pH, reaction time, dose of catalyst, dose of H₂O₂ (mass fraction 30%): take the γ-Al₂O₃ which is impregnated by Cu(NO₃)₂ for catalyst, when pH value is 3, volume fraction of catalyst is 40%, volume fraction of H₂O₂ is 4%, reaction time above 3 h, COD_Cr is degraded from 4540 mg/L to lower than 600 mg/L and the ammonia nitrogen is degraded from 552 mg/L to lower than 160 mg/L.

Key words: heterogeneous catalytic oxidation, aluminum oxide, coking wastewater

中图分类号: 

• X703.1