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Preparation of New Fenton Fixed-bed Catalytic Carrier and Its Advanced Treatment for Papermaking Wastewater |
Received:February 16, 2021 |
DOI:10.11980/j.issn.0254-508X.2021.08.006 |
Key Words:fixed bed Fenton oxidation catalytic carrier papermaking wastewater |
Fund Project:陕西省重点研发计划(编号:2017ZDXM-SF-096)。 |
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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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