紫外催化氧化强化处理酚氨回收废水  

Ultraviolet-catalytic oxidation of phenol ammonia recycling wastewater

作　　者：许婧璐 丁康 刘志英 陆曦 徐炎华 XU Jinglu;DING Kang;LIU Zhiying;LU Xi;XU Yanhua(College of Environmental Science and Engineering,Nanjing Tech University,Nanjing Jiangsu 211800;NJTECH Environment Technology Co.,Ltd.,Nanjing Jiangsu 210009)

机构地区：[1]南京工业大学环境科学与工程学院,江苏南京211800 [2]南京工大环境科技有限公司,江苏南京210009

出　　处：《环境污染与防治》2018年第8期884-889,共6页Environmental Pollution & Control

基　　金：国家重点研发计划项目(No.2017TFB0602500);江苏省高校自然科学研究计划项目(No.16KJA610002);山西省科技重大专项(No.MH2015-08)

摘　　要：采用等体积浸渍法制备了非均相催化剂LaFe_(0.9)Mn_(0.1)O_3/TiO_2用于紫外催化氧化处理煤气化酚氨回收生化出水,通过X射线衍射(XRD)和扫描电子显微镜(SEM)表征来研究催化剂的结构特性。考察了pH、双氧水投加量、催化剂焙烧温度、催化剂投加量和反应时间对氧化效果的影响,最后探究污泥炭对反应的强化作用。结果表明所制备的催化剂具有标准的钙钛矿晶型,当处于pH=3、双氧水投加量0.20%(体积分数)、催化剂焙烧温度700℃、催化剂投加量3.0g/L、反应时间60 min、污泥炭投加量1.0g/L、紫外辐照强度30 W条件下,COD去除率达到78.9%、总有机碳(TOC)去除率达到73.1%,废水中大量有机污染物被降解,毒性大大降低。污泥炭的投加对紫外催化氧化具有强化作用,而过量投加会抑制催化剂活性。Heterogeneous catalyst LaFe0.9Mn0.1O3/TiO2 was prepared through incipient wetness impregnation method and employed in the ultraviolet-catalytic oxidation of bio-chemical effluent of phenol ammonia recycling wastewater.The catalyst was characterized by X-ray diffraction(XRD)and scanning electron microscope(SEM).Experiments were conducted to study the influence of pH,dosage of peroxide,pyrolysis temperature,dosage of catalyst and reaction time on the oxidation.The catalytic effect of sludge-derived carbon(SC)on the oxidation was also studied.The results showed that the prepared catalyst had standard perovskite structure.When pH was 3,dosage of peroxide was 0.20%(volume fraction),pyrolysis temperature was 700℃,dosage of catalyst was 3.0 g/L,reaction time was 60 min,dosage of SC was 1.0 g/L and ultraviolet irradiation intensity was 30 W,the removal rate of COD and total organic carbon(TOC)reached 78.9%and 73.1%,respectively.Most of the organic matter was degraded and the toxicity of the wastewater greatly decreased.SC enhanced the oxidation while excess dosage of SC would restrain the catalysis of LaFe 0.9 Mn 0.1 O 3/TiO 2.

关 键 词：LaFe0.9Mn0.1O3/TiO2 紫外催化氧化 污泥炭 

分 类 号：X703[环境科学与工程—环境工程]