钢渣过硫酸盐体系中活性艳红X3B染料光催化降解研究-市政工程专业论文.docxVIP

华 中 科 技 大 学 硕 士 学 位 论 文 II 本实验研究表明，钢渣/过硫酸盐体系对活性艳红X3B具有良好的光催化降解效 果，为钢渣的资源化利用找到了一条新的出路。 关键词：钢渣 Fe2+ 过硫酸钾 硫酸根自由基 模拟太阳光 X3B III Abstract Dye wastewater which is not only complex composition, but also higher concentration and difficult treatment, is one of the major source of environmental pollution in printing and dyeing industry. The steel slag has large annual production, which will not only result in a waste of resources, but also a threat to human health and safety. Because of higher iron content in steel slag, using steel slag activated persulfate which can produce stronger oxidizing sulfate radical SO4???to decolourization of reactive brilliant red X3B azo dye which is used more often in the printing and dyeing industry, has important significance to realize using waste to treat waste. First of all, this paper studied the photocatalytic decolourization of reactive brilliant red X3B in Fe2+/persulfate system, discussed the mechanism of SO4???generating in this system and the affect of Fe2+ concentration, potassium persulfate concentration, pH value, transition metal ions and other factors, and researched the degradation pathway and degradation mechanism of reactive brilliant red X3B. The results showed that this system not only had good photocatalytic performance, but also faster response. The pH value was an important factor and lower pH was conducive to the reaction proceeds. With the increase of the FeSO4 concentration, the removal rate of X3B was increased and then decreased. When the dosage of FeSO4 was 0.2 mmol/L, the removal rate reached a maximum at 89.63%. Also, the removal rate of X3B was enhanced gradually with the increase of K2S2O8 concentration. But when the dosage of K2S2O8 reached to 2.0 mmol/L, the change of removal rate was gradually smoothly. In several transition metal elements with high content in steel slag, Fe2+ had strongest ability to activate persulfate. Secondly, this thesis studied the photodegradation effect of X3B