摘要
以γ-Al2O3为载体,Fe、Mn、Cu和Zn的硝酸盐为活性组分的前驱物,采用浸渍焙烧法制备了负载型催化剂,并分别以H2O2和NaClO为氧化剂,对比了在常温常压条件下催化湿式氧化工艺中处理甲基橙AO52模拟废水的效果,考察了各种条件对催化剂活性的影响。结果表明,Fe2O3/γ-Al2O3表现出较好的催化活性和稳定性,H2O2为适宜的氧化剂;以100 mmol·L-1的Fe(NO3)3溶液浸渍15 h,烘干后在350℃焙烧3 h,得到兼具活性与稳定性的Fe2O3/γ-Al2O3催化剂;当Fe2O3/γ-Al2O3和H2O2投加量分别为30和1.65 g·L-1时,处理4 h后,废水的脱色率、COD去除率和TOC去除率最高分别达88.21%、78.57%和83.20%。
Four kinds of transition metals had been chosen, which were Fe, Mn, Cu and Zn as active component to prepare the supported catalysts Fe2O3/γ-Al2O3, MnO/γ-Al2O3, CuO/γ-Al2O3, ZnO/γ-Al2O3 in which γ-Al2O3 were used as carrier. Catalytic activities of the four prepared catalysts were further investigated under the room temperature and atmospheric pressure by adding H2O2 and NaCIO as oxidant respectively. The paper＇s experimental results have shown that Fe2O3/γ-Al2O3 had the highest catalytic activity and stability, and H2O2 was thought to be the suitable oxidant. To optimize preparing process of Fe2O3/γ-Al2O3, the calcination temperature, calcination time, dipping solution concentration, and dipping time were investigated to find the better conditions. The results indicated that 100 mmol.L^-1 of Fe（NO3）3 solution for 15 h dipping and calcination for 3 h at 350℃ after drying, get the best activity and stability of the Fe2O3/γ-Al2O3 catalyst. By adding 30 g·L^-1 Fe2O3/γ-Al2O3 and 1.65 g·L^-1 H2O2, after 3 h wastewater treatment of methyl orange solution, the decolorization efficiency was up to 88.21%, COD removal efficiency is 78.57%, and TOC removal efficiency was 83.20%.
出处
《水处理技术》
CAS
CSCD
北大核心
2011年第4期49-52,共4页
Technology of Water Treatment
基金
校青年科技基金资助项目(QN1027)
关键词
催化湿式氧化
负载型催化剂
甲基橙AO52
废水处理
room temperature and atmospheric pressure
catalytic wet oxidation
catalysts
methyl orange
wastewater treatment
