Fenton法处理垃圾渗滤液和复合金属氧化物催化NaClO氧化降解染料废水的研究
发布时间：2019-05-16 00:37
【摘要】：垃圾渗滤液是垃圾在填埋过程中产生的一种有毒有害的高浓度废水,仅采用生物处理很难实现渗滤液的达标排放。要满足垃圾渗滤液处理达标排放的要求,必须经过深度处理。本文通过单因素分析实验确定了Fenton试剂处理垃圾渗滤液的最佳反应条件:初始pH为5,FeSO4为40 mmol/L,H2O2为60 mmol/L,反应时间3 h,垃圾渗滤液的COD去除率可达到了60%,当采取连续分级处理三次,垃圾渗滤液的COD由2400 mg/L降到488 mg/L,去除率可提高到80%。因此用Fenton试剂处理垃圾渗滤液的试剂成本约为8.8元/吨。近年来,染料工艺得到迅速发展,染料品种已达数万种之多,给染料废水的处理带来了更大困难。本文通过实验发现复合金属氧化物催化剂CuMgFe-4可以有效提高NaClO氧化降解染料废水的效率。在CuMgFe-4 0.10 g,NaClO 20 mM,反应温度30℃条件下,可使浓度为60 mM的甲基橙(MO)、亚甲基蓝(MB)和罗丹明B(RhB)在1 h内脱色率为100%。在CuMgF-4 0.1 g,NaClO 100.8 mM,30℃条件下反应1 h,可以使染料废水浓缩液COD从234 mg/L降到50 ppm,COD去除率达到了82%,脱色率100%。处理后的染料废水浓缩液达到国家污水污水处理一级A标准,所需要的NaClO的费用约为30.4元/吨。当染料废水浓缩液稀释到COD为78 mg/L时,在CuMgFe催化剂0.1 g,NaClO 4.4 mM,30℃条件下反应1 h,可以使染料废水浓缩液COD降到50 ppm,处理后染料废水达到污水处理一级A标准,所需要的NaClO的费用约为1.3元/吨。复合金属氧化物催化剂CuMgFe-4负载后,可以实现连续处理染料污水浓缩液处理,固定床反应器中装载15g催化剂,将染料污水浓缩液和60 mM的NaClO溶液以1:2的速率比用蠕动泵泵入,流速为72mL/h,连续处理染料污水浓缩液4 d,染料废水浓缩液脱色率100%,COD去除率保持在80%左右。
[Abstract]:Landfill leachate is a kind of toxic and harmful high concentration wastewater produced in the process of landfill. It is difficult to meet the discharge standard of leachate by biological treatment alone. In order to meet the requirements of landfill leachate treatment to meet the discharge standards, it must go through advanced treatment. In this paper, the optimum reaction conditions of Fenton reagent for the treatment of landfill leachate were determined by single factor analysis: the initial pH is 5, the FeSO4 is 40 mmol/L,H2O2 and the reaction time is 60 mmol/L, for 3 h, and the COD removal rate of landfill leachate can reach 60%. When the COD of landfill leachate is reduced from 2400 mg/L to 488 mg/L, the removal rate can be increased to 80%. Therefore, the reagent cost of treating landfill leachate with Fenton reagent is about 8.8 yuan / ton. In recent years, dye technology has been developed rapidly, and there are tens of thousands of dye varieties, which brings more difficulties to the treatment of dye wastewater. In this paper, it is found that the composite metal oxide catalyst CuMgFe-4 can effectively improve the efficiency of NaClO oxidation degradation of dye wastewater. Under the condition of CuMgFe-4 0.10g and NaClO 20 mM, reaction temperature 30 鈩，
本文编号：2477885
[Abstract]:Landfill leachate is a kind of toxic and harmful high concentration wastewater produced in the process of landfill. It is difficult to meet the discharge standard of leachate by biological treatment alone. In order to meet the requirements of landfill leachate treatment to meet the discharge standards, it must go through advanced treatment. In this paper, the optimum reaction conditions of Fenton reagent for the treatment of landfill leachate were determined by single factor analysis: the initial pH is 5, the FeSO4 is 40 mmol/L,H2O2 and the reaction time is 60 mmol/L, for 3 h, and the COD removal rate of landfill leachate can reach 60%. When the COD of landfill leachate is reduced from 2400 mg/L to 488 mg/L, the removal rate can be increased to 80%. Therefore, the reagent cost of treating landfill leachate with Fenton reagent is about 8.8 yuan / ton. In recent years, dye technology has been developed rapidly, and there are tens of thousands of dye varieties, which brings more difficulties to the treatment of dye wastewater. In this paper, it is found that the composite metal oxide catalyst CuMgFe-4 can effectively improve the efficiency of NaClO oxidation degradation of dye wastewater. Under the condition of CuMgFe-4 0.10g and NaClO 20 mM, reaction temperature 30 鈩，
本文编号：2477885
本文链接：https://www.wllwen.com/kejilunwen/huanjinggongchenglunwen/2477885.html
