赤泥协同Fenton法处理焦化废水的研究
Study on treatment of coking wastewater by Fenton process combined with red mud
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摘要: 采用赤泥吸附协同Fenton法处理焦化废水，两者协同处理对COD的去除率高于其单独处理之和。考察了赤泥投加量、初始pH值、反应温度、H2O2浓度和Fe2+浓度等因素对降解效果的影响，实验结果表明，在20 g/L的赤泥、初始pH=3、80 mmol/L的H2O2、224 mg/L的Fe2+的最佳条件下，经过120 min的处理，焦化废水中COD去除率达到93.5%。赤泥对COD吸附作用，以及赤泥中在酸性环境下溶出的Fe2+是强化Fenton氧化技术的重要原因。赤泥作为一种工业废渣，不仅提高了COD的去除率还达到了以废治废的目的。Abstract: The Fenton process combined with red mud was applied for treatment of coking wastewater. The COD removal rate in the synergic process was higher than that both in Fenton process and in red mud absorption process. Some important affecting factors were discussed. The results show that the COD removal rate reached to 93.5% after 120 min under the optimized conditions (the dosage of red mud : 20 g/L， initial pH value: 3， the concentration of H2O2: 80 mmol/L， the concentration of Fe2+: 224 mg/L). The increasing COD removal in wastewater results from the adsorption of red mud and ferrous iron dissolved from red mud under the acidic condition. As an industrial waste， red mud promotes COD removal efficiency in coking wastewater.
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Key words:
- Fenton /
- red mud /
- coking wastewater
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