摘要：

传统Fenton氧化法对高盐废水中有机污染物的处理效果不理想。为提高高盐废水中有机污染物的处理效果，在传统Fenton法基础上选用廉价、安全易得的Fe⁰代替Fe²⁺参与反应，并创新性地加入硼（B）作为还原剂，以促进Fenton体系对高盐废水中有机污染物（柠檬黄）的降解。结果表明，B/Fe⁰/H₂O₂体系对高盐废水中柠檬黄有着很好的去除效果，在盐（Na₂SO₄）浓度为0.2 mol/L、反应60 min时，柠檬黄的最终降解率达到100%，B、Fe⁰以及H₂O₂的最佳投加量分别为0.2 g/L、0.02 g/L和1 mmol/L。B/Fe⁰/H₂O₂体系对盐（Na₂SO₄）浓度在0~0.4 mol/L的废水都有着很好的柠檬黄降解率，且在废水中含有其他不同阴离子组合时仍具有很好的降解效果。6次循环后，反应30 min时B/Fe⁰/H₂O₂体系对柠檬黄的去除率仍然可以达到87.0%，说明B/Fe⁰/H₂O₂体系具有较好的循环性能。B的投加促进了Fe³⁺/Fe²⁺循环，使得Fe²⁺能不断催化H₂O₂产生·OH，从而提升对高盐废水中有机物的去除效率。

关键词: Fenton法, 零价铁, 硼, 柠檬黄, 高盐废水

Abstract:

Traditional Fenton process can not efficiently remove organic pollutants from high-salt wastewater. In order to improve the treatment efficiency of the Fenton method，this experiment used cheap and safe zero-valent iron instead of divalent iron to participate in the reaction based on the traditional Fenton method，and innovatively added boron as a reducing agent to promote the degradation efficiency of organic pollutants in high-salt wastewater. The results indicated that B/Fe⁰/H₂O₂ process could efficiently remove tartrazine from high-salt wastewater. The tartrazine removal efficiency within 60 min could reach 100% in 0.2 mol/L Na₂SO₄ system at the condition of B，Fe⁰ and H₂O₂ dosage were 0.2 g/L，0.02 g/L and 1 mmol/L，respectively. The B/Fe⁰/H₂O₂ system had good degradation rates for wastewater in the range of 0-0.4 mol/L salt concentration and had good treatment efficiency at different salt system. The tartrazine removal efficiency within 30 min could still reach 87.0% after six cycle，indicating B/Fe⁰/H₂O₂ process exhibited good recycle performance. Boron promoted the Fe³⁺/Fe²⁺ cycle，allowing Fe²⁺ to continuously catalyze the production of ·OH from H₂O₂，thus enhancing the removal efficiency.

Key words: Fenton, Fe⁰, boron, tartrazine, high-salt wastewater

中图分类号: 

• X703