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新型Fenton-固定床催化载体的制备及其对造纸废水深度处理的研究
Preparation of New Fenton Fixed-bed Catalytic Carrier and Its Advanced Treatment for Papermaking Wastewater
收稿日期:2021-02-16  
DOI:10.11980/j.issn.0254-508X.2021.08.006
关键词:  固定床  Fenton氧化  催化载体  造纸废水
Key Words:fixed bed  Fenton oxidation  catalytic carrier  papermaking wastewater
基金项目:陕西省重点研发计划(编号:2017ZDXM-SF-096)。
作者单位邮编
张巧霞 陕西科技大学轻工科学与工程学院轻化工程国家级实验教学示范中心陕西西安710021 710021
罗清 陕西科技大学轻工科学与工程学院轻化工程国家级实验教学示范中心陕西西安710021 710021
张安龙 陕西科技大学环境科学与工程学院陕西西安710021 710021
薛伟 陕西科技大学轻工科学与工程学院轻化工程国家级实验教学示范中心陕西西安710021 710021
刘叶 陕西科技大学轻工科学与工程学院轻化工程国家级实验教学示范中心陕西西安710021 710021
程丙军 西安隆华环保 技术有限公司陕西西安710019 710019
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摘要:以陶粒填料为载体,采用浸渍-焙烧法制备了新型Fenton-固定床催化载体,考察了FeCl3溶液浓度和焙烧温度对催化载体催化活性的影响。结果表明,在FeCl3溶液浓度0.75 moL/L、焙烧温度600℃的条件下,制备得到的催化载体对造纸废水的催化活性最好。将此新型催化载体置于固定床内联合Fenton氧化法进行造纸废水深度处理,在最佳工艺条件(水样初始pH值=5、催化载体添加量10 g/L、0.5 g/L FeSO4·7H2O、0.3 mL/L H2O2(质量分数30%)、反应时间60 min)下,其对造纸废水CODCr的去除率为72%。对比3种处理工艺(常规Fenton、填料-Fenton和Fenton-固体床催化载体)可知,达到相同的废水处理效果时,Fenton-固定床催化载体处理工艺所需的药品添加量最少,所需的水样初始pH值最高。
Abstract:A new type of Fenton fixed-bed catalytic carrier was prepared by immersion-roasting method via using ceramics filter as the carrier. The effects of concentration of FeCl3 solution and roasting temperature on the catalytic activity of the catalytic carrier were studied. The results showed that the catalytic activity of the catalytic carrier was optimum when the concentration of FeCl3 solution was 0.75 moL/L and roasting temperature was 600℃. This new type of catalytic carrier was placed in a fixed bed combined with Fenton oxidation method for advanced treatment of papermaking wastewater. Under the optimal process conditions (initial pH value was 5, addition amount of catalytic carrier was 10 g/L, amount of FeSO4·7H2O was 0.5 g/L, amount of H2O2 (mass fraction 30%) was 0.3 mL/L, reaction time was 60 min), the CODCr removal efficiency of 72% was reached. Comparing three treatment processes, it could be seen that when the same wastewater treatment efficiency was achieved, the Fenton-fixed-bed catalytic carrier treatment process required the least amount of chemical addition, and the required initial pH of the water sample was the highest.
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