钢渣非均相类Fenton反应降解亚甲基蓝的研究

使用钢渣作为催化剂,以双氧水为氧化剂,催化降解废水中的亚甲基蓝.实验结果表明,酸性条件在整个反应中起到至关重要的作用,只有在一定的酸度下才会有较好的催化效果;其次,亚甲基蓝的去除率随双氧水浓度的提高先上升后下降;此外,钢渣剂量、钢渣粒径、反应温度等因素主要通过影响Fe的溶出影响亚甲基蓝的去除率.在钢渣(45~58μm)质量浓度为6 g/L,双氧水体积分数为0.000 6,反应温度为30℃,反应时间60 min的酸性条件下,质量浓度为200 mg/L的亚甲基蓝去除率达99.10%.根据反应前后钢渣的红外光谱,亚甲基蓝是被氧化去除而不是被吸附去除.

Study on Degradation of Methylene Blue Through Heterogeneous Fenton in Slag Catalyst

The catalytic degradation of methylene blue (MB) in wastewater were investigated， in which slag and hydrogen peroxide were used as catalyst and oxidation agent， respectively. The results show that the acid dosage plays a vital role in the whole reaction， and the effective degradation is achieved in the condition of a given acid dosage. The removal rate of MB increases first and then decreases with increase of the concentration of hydrogen peroxide. Moreover， the particle size of slag， steel slag dose， and reaction temperature mainly affect the removal rate of MB by affecting the dissolution of Fe. The removal rate of MB can achieve 99.1% under the following experimental conditions: reaction time 60min， the concentration of MB solution 200 mg/L， initial H₂O₂ concentration 0.000 6， steel slag(45~58μm)dosage 6g/L and reaction temperature 30℃. According to the infrared spectrum of steel slag before and after the reaction， MB is removed by oxidization but not by adsorption.