Co_(3)O_(4)对2,4-二氯苯酚的吸附性能影响  

Adsorption of Co_(3)O_(4) to 2,4-Dichlorophenol: Preparation Process and Properties

作　　者：王召东[1] 杜慧显 赵保林 刘雪平[1] 毛艳丽[1] 康海彦[1] 刘彪[1] 郭一飞[1] 刘红盼 宋忠贤 Wang Zhaodong;Du Huixian;Zhao Baolin;Liu Xueping;Mao Yanli;Kang Haiyan;Liu Biao;Guo Yifei;Liu Hongpan;Song Zhongxian(Henan University of Urban Construction,Henan Province Key Laboratory of Water Pollution Control and Rehabilitation Technology,Pingciiiigshun,Henan 467000,China;College of Materiuls and Chemical Engineering,Chongqing University of Arts and Sciences,Chongqing 402160,China)

机构地区：[1]河南城建学院河南省水体污染与防治重点实验室,河南平顶山467000 [2]重庆文理学院材料与化学工程学院,重庆402160

出　　处：《化学世界》2021年第1期52-58,共7页Chemical World

基　　金：河南城建学院博士引进启动基金(No.990/Q2017011);河南城建学院青年骨干教师(No.YCJQNGGJS201903)资助项目;河南省高等院校重点学科(No.20A610003)。

摘　　要：以硝酸钴(Co(NO_(3))_(2)·6H_(2)O)为钴源,考察了不同沉淀剂(6 mol/L氨水、1 mol/L NaOH溶液、饱和碳酸铵溶液)对Co_(3)O_(4)吸附2,4-二氯苯酚(2,4-DCP)性能的影响。考察了焙烧温度、pH值、沉淀剂种类、吸附剂用量、2,4-DCP初始质量浓度对Co_(3)O_(4)吸附性能的影响,并进行了离子干扰实验。结果表明,焙烧温度为300℃、pH=9.0、沉淀剂为1 mol/L NaOH时,Co_(3)O_(4)对20 mg/L 2,4-DCP吸附性能最佳。Co_(3)O_(4)对2, 4-DCP的动力学吸附过程符合准二级动力学方程,等温吸附方程符合Langmuir方程,吸附过程以单分子层化学吸附为主。Co_(3)O_(4) was prepared by using Co(NO_(3))_(2)·6 H_(2)O as cobalt source with different precipitants(6 mol/L NH_(4)OH, 1 mol/L NaOH and saturated(NH_(4))_(2)CO_(3) solution). The effects of calcination temperature, pH value, precipitant, adsorbent dosage and initial concentration of 2,4-dichlorophenol(2,4-DCP) on the removal of 2,4-DCP over Co_(3)O_(4) were investigated. The results showed that the optimal conditions were the combustion temperature of 300 ℃, pH of 9.0, precipitant of 1 mol/L NaOH the initial concentration of 2,4-DCP of 20 mg/L, thus Co_(3)O_(4) exhibited the best adsorption proper on 2,4-DCP. Furthermore, the kinetic adsorption process of Co_(3)O_(4) on 2,4-DCP obeyed the quasi-second-order kinetic equation, and the thermodynamic adsorption obeyed the Langmuir equation. Besides, the adsorption process of Co_(3)O_(4) on 2,4-DCP was dominated by single molecular layer chemical adsorption.

关 键 词：Co_(3)O_(4) 2 4-二氯苯酚 沉淀剂 焙烧温度 吸附 

分 类 号：X703[环境科学与工程—环境工程]