Cu-Fe尖晶石型催化剂催化H_2O_2处理苯酚废水的研究
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摘要
通过溶胶凝胶-自蔓延燃烧-高温焙烧法制备了Cu-Fe双金属尖晶石型催化剂,采用BET、EDX、XRD、SEM等分析方法对催化剂进行表征。结果表明,制备的催化剂样品均产生了典型的尖晶石型结构,且在600℃下焙烧制得催化剂样品催化活性最高。同时设计了催化H_2O_2降解模拟苯酚废水的实验,结果表明,当H_2O_2质量浓度为1. 6 mg/L、催化剂质量浓度为2. 5 g/L、反应时间为120 min时,苯酚和COD的去除率分别为98. 4%和90. 8%;催化剂使用9次后,苯酚和COD的去除率分别为79. 6%和72. 2%。
A Cu-Fe bimetallic spinel-type catalyst is prepared through sol-gel,self-propagating combustion and high-temperature roasting methods.The samples are characterized by BET,EDX,XRD and SEM.The results show that all samples forms spinel structure and the catalyst sample calcined at 600℃ has the highest catalytic activity among these samples. The experiments are designed for the degradation of simulated phenol-containing wastewater and the experimental results show that the removal rates of phenol and COD can reach 98. 4% and 90. 8%,respectively when H_2O_2 dosage is 1. 6 mg·L-1,catalyst dosage is 2. 5 g·L-1 and reaction time is 120 min.The removal rates of phenol and COD can still reach 79. 6% and 72. 2%,respectively after the catalysts are used nine times.
A Cu-Fe bimetallic spinel-type catalyst is prepared through sol-gel,self-propagating combustion and high-temperature roasting methods.The samples are characterized by BET,EDX,XRD and SEM.The results show that all samples forms spinel structure and the catalyst sample calcined at 600℃ has the highest catalytic activity among these samples. The experiments are designed for the degradation of simulated phenol-containing wastewater and the experimental results show that the removal rates of phenol and COD can reach 98. 4% and 90. 8%,respectively when H_2O_2 dosage is 1. 6 mg·L-1,catalyst dosage is 2. 5 g·L-1 and reaction time is 120 min.The removal rates of phenol and COD can still reach 79. 6% and 72. 2%,respectively after the catalysts are used nine times.
引文
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[2]焦庆周.催化氧化-萃取法处理酚醛树脂的苯酚废水[D].合肥:合肥工业大学,2013.
[3]Neyens E,Baeyens J.A review of classic Fenton's peroxidation as an advanced oxidation technique[J]. J Hazard Mater,2003,98(1-3):33-55.
[4]Moreira F C,Boaventura R A R,Brallas E,et al. Electrochemical advanced oxidation processes:A review on their application to synthetic and real wastewaters[J]. Appl Catal B-Environ,2017,202:217-261.
[5]Zhang A Y,Lin T,He Y Y,et al.Heterogeneous activation of H2O2by defect-engineered Ti O2-x single crystals for refractory pollutants degradation:A Fenton-like mechanism[J]. J Hazard Mater,2016,311:81.
[6]《实用化学手册》编写组.实用化学手册[M].北京:科学出版社,2010:1-3.
[7]刘春英,柳云骐,张珂,等.溶胶-凝胶法合成钛酸锂及石墨烯的掺杂改性[J].电源技术,2013,37(1):28-31.
[8]国家环境保护局标准处.GB HJ503—2009水质水中挥发酚类的测定4-氨基安替比林分光光度法[S].北京:中国标准出版社,2009.
[9]国家环境保护局标准处.GB 11914—1989水质化学需氧量的测定重铬酸盐法[S].北京:中国标准出版社,1990.
[10]邓子峰,喻赛芳,胡婷婷.高铁酸钾降解苯酚的机制研究[J].环境污染与防治,2007,29(12):905-907.
[11]Rezlescu N,Rezlescu E,Doroftei P P,et al. Some nanograined ferrites and perovskites for catalytic combustion of acetone at low temperature[J].Ceram Int,2015,41(3):4430-4437.
[12]Tasca J E,Quincoces C E,Lava A,et al.Preparation and characterization of CuFe2O4bulk catalysts[J]. Ceram Int,2011,37(3):803-812.
[13]叶明泉,刘竹波,韩爱军.溶胶凝胶自蔓延燃烧法制备钴蓝颜料[J].化工进展,2010,29(5):927-931.
[14]单宁,杨海洁. Fenton法深度处理印染废水[J].浙江化工,2015,46(2):47-49.
[15]Popiel S,Nalepa T,Dzierzak D,et al.Rate of dibutylsulfide decomposition by ozonation and the O3/H2O2advanced oxidation process[J].J Hazard Mater,2009,164(2-3):1364-1371.
[16]Zhao H,Dong Y,Wang G,et al.Novel magnetically separable nanomaterials for heterogeneous catalytic ozonation of phenol pollutant:Ni Fe2O4and their performances[J]. Chem Eng J,2013,219(3):295-302.
[17]Li K,Kuo C,Weeks J.A kinetic study of ozone-phenol reaction in aqueous solutions[J].Aiche J,2010,25(4),583-591.