阳极电化学氧化降解水体中酚的研究  

DEGRADATION OF PHENOL IN THE WATER BY ANODE ELECTRICAL CHEMISTRY OXIDATION

作　　者：时文中[1,2] 褚意新 朱国才[3] 

机构地区：[1]驻马店师范高等专科学校化学系 [2]清华大学核能技术设计研究院,北京102201 [3]清华大学核能技术设计研究院

出　　处：《水处理技术》2005年第6期32-34,46,共4页Technology of Water Treatment

基　　金：国家自然科学基金(59804004);国家杰出青年科学基金(59725408)资助项目

摘　　要：研究了不同种类支持电解质阳极氧化降解水体中的苯酚时,电解质种类与浓度、电流密度、苯酚初始浓度等对苯酚去除率、槽电压和COD去除率的影响。结果表明:支持电解质对COD的去除率影响较大。苯酚的去除率和去除速率顺序为碱(NaOH)>盐(Na2SO4)>酸(H2SO4),COD的去除率和去除速率顺序为酸(H2SO4)>盐(Na2SO4)>>碱(NaOH)。碱性条件有利于苯酚的电化学转化,酸性条件有利于苯酚的彻底氧化处理。在一定的条件下,使用各类电解质,苯酚的最大去除率均能接近100%。当支持电解质H2SO4的浓度为0.1mol/L、苯酚初始浓度为200mg/L、电流密度为0.03A/cm2、温度为25℃、阳极氧化进行550min时,COD的去除率达70%。The degradation of phenol in water by anode electric chemical process was studied and the effect of the kinds and concentration of supporting electrolytes, current density and initial phenol concentration on the removal rate of phenol, pond voltage, and COD removal rate were investigated.The results showed that the effect of the supporting electrolytes on COD removal rate was more marked; the order of phenol removal rate and removal speed was: alkali (Na2SO4)>salt(Na2SO4)>acied(H2SO4); the order of COD removal rate and removal speed was: acid(NaOH)>salt(Na2SO4)>alkali(NaOH). Alkaline condition is advantageous to electric chemical conversion of phenol and acidic condition is advantageous to fully oxidation of phenol, under a certain conditions the maximium removal rate of phenol by using various electrolytes can be approximate to 100%; when concentration of the supporting electrolytes H2SO4 was 0.1mol/L, initial phenol concentration was 200mg/L; current density, 0.03A/cm2 and temperature, 25℃, and when anode oxidation was carried out for 550 min., COD removal rate could reach to 70%.

关 键 词：阳极氧化 苯酚 电解质 去除率 槽电压 

分 类 号：O646.542[理学—物理化学] X703.1[理学—化学]