For No. 2 catalyst by adjusting the pH to 10 and adding 1 000 mgClO2/L wastewater,an active time of 60 minutes was the most effective and economical. The COD removal rate was 80.0%,and the cost was 6.02 yuan/kgCOD.

• 二氧化氯+2%23催化剂催化氧化处理活性艳红X-3B染料废水时；最佳pH值为10左右；二氧化氯投加量为1 000 mg/L废水；反应60 min后；COD去除率可达80.；0%25；药剂费为6