载铁沸石催化H2O2降解阳离子红X-GRL染料废水

以天然沸石为载体，FeSO₄·7H₂O溶液为浸渍液，采用浸渍蒸干法制备载铁沸石非均相类Fenton反应催化剂，并用其催化H₂O₂降解阳离子红X-GRL染料废水。结果表明，浸渍液浓度为0.18 mg/L、煅烧温度为300 ℃时制备的催化剂铁含量较高、催化效果和稳定性较好。当反应时间为120 min、溶液pH为3.0、催化剂投加量为20.0 g/L、H₂O₂投加量为30.0 mmol/L时，催化降解效果最佳，对染料废水TOC、色度、COD_Cr和TN的去除率分别为60.3%、99.4%、55.5%和49.9%；载铁沸石催化剂重复使用3次后，仍具有一定的催化效果。

Degradation of Cationic Red X-GRL Dye Wastewater with H2O2 Catalyzed by Fe-containing Zeolite

The Fe-containing zeolite heterogeneous Fenton-like reaction catalysts were prepared by evaporation impregnation liquid methods, with natural zeolite as carrier and ferrous sulphate heptahydrate as impregnation liquid. The dye wastewater, Cationic Red X-GRL, was degraded by hydrogen peroxide catalyzed by these catalysts. The catalysts prepared at the conditions of impregnated liquid concentration 0.18 mg/L, calcined temperature 300 ℃, had a higher iron content, better catalytic effect and stability. Catalysts had the best catalytic effect, when reaction time was 120 min, solution pH was 3.0, catalysts dosage was 20.0 g/L, and H2O2 concentration was 30.0 mmol/L. The TOC, chromaticity, CODCr, and TN removal rates of the dye wastewater, Cationic Red X-GRL, were 60.3%, 99.4%, 55.5% and 49.9%, respectively. After repeated used three times, the catalysts still had a certain catalytic effect.