煤气化渣基Fe/Cu双活性催化剂的制备及其在制浆造纸废水深度处理中的应用

Preparation of Fe/Cu Dual Active Catalysts Based on Coal Gasification Slag and Their Application in Pulp and Paper Wastewater Applications in Deep Processing

关键词:  煤气化渣  碳硅介孔材料  非均相Fenton催化剂

Key Words:coal gasification slag  carbon-silicon mesoporous materials  heterogeneous Fenton catalyst

摘要:以煤气化渣酸浸处理制备的碳硅介孔材料为载体，通过碳热还原法制备了Fe/Cu双活性非均相Fenton催化剂，对催化剂的制备工艺进行了优化，以对氯苯酚为模型物探究了其催化H₂O₂去除对氯苯酚及处理制浆造纸废水的效果。结果表明，在煅烧温度900 ℃，浸渍液浓度0.2 mol/L，Fe/Cu物质的量比2∶1的条件下制备的催化剂具有最高的活性，对于对氯苯酚的去除率可达96.8%；在初始pH值=5，H₂O₂投加量16 mmol/L，催化剂投加量1.25 g/L，反应时间120 min的条件下，废水的COD_Cr去除率67.8%，色度去除率97.4%，出水COD_Cr浓度63.13 mg/L。

Abstract:Fe/Cu dual active heterogeneous Fenton catalyst was prepared using carbon silicon mesoporous material prepared by acid leaching of coal gasification slag as a carrier through carbon thermal reduction method. The preparation process of the catalyst was optimized and its catalytic effect on the removal of p-chlorophenol and treatment of pulp and paper wastewater by H₂O₂ was investigated with p-chlorophenol as madel. The results showed that the catalyst prepared under the conditions of calcination temperature of 900 ℃， impregnation solution concentration of 0.2 mol/L， and Fe/Cu molar ratio of 2∶1 had the highest activity， with a removal rate of 96.8% for chlorophenol. Under the conditions of initial pH value=5， H₂O₂ dosage of 16 mmol/L， catalyst dosage of 1.25 g/L， and reaction time of 120 min， the COD_Cr removal rate of wastewater was 67.8%， the chromaticity removal rate was 97.4%， and the effluent COD_Cr was 63.13 mg/L.