改性柏树锯末对铜离子吸附机制研究  

Study on copper ions adsorption mechanism of modified cypress sawdust

作　　者：杨娜[1,2] 杨秀培[2] YANG Na;YANG Xiu-pei(Nanchong Vocational and Technical College,Nanchong 637131,China;College of Chemistry and Chemical Engineering,China West Normal University,Nanchong 637000,China)

机构地区：[1]南充职业技术学院,四川南充637131 [2]西华师范大学化学化工学院,四川南充637009

出　　处：《化学研究与应用》2023年第4期809-814,共6页Chemical Research and Application

基　　金：国家自然科学基金面上项目(21777130)资助;南充职业技术学院校级项目(ZRB2203)资助。

摘　　要：本文以KMnO_(4)改性处理的柏树锯末为吸附剂,对溶液中的Cu^(2+)吸附去除。结果表明,改性锯末增大了孔径和比表面积,吸附剂表明吸附位点增多,当pH=7、吸附剂用量1 g·L^(-1)及温度318 K的条件下吸附效果最佳。改性柏树锯末对Cu^(2+)的吸附动力学和等温线线性拟合结果分别符合准二级动力学方程和Langmuir吸附等温模型,说明该吸附过程是单分子层吸附,并以化学吸附为主。In this paper,KMnO_(4)-modified cypress sawdust was used as adsorbent to remove Cu^(2+)from aqueous solution.The results showed that the pore size and surface area of sawdust adsorbent were increased by modification,and the adsorption sites were increased.When the pH value of solution system was 7,the dosage of adsorbent was 1 g·L^(-1) and the temperature was 318K,the adsorption effect was the best.The adsorption kinetics and isothermal linear fitting of the modified sawdust for Cu^(2+)were confirmed to accord with the quasi-secondary kinetic equation and Langmuir adsorption isothermal model,respectively,indicating that the adsorption process was monolayer adsorption and mainly chemical adsorption.

关 键 词：改性柏树锯末 铜离子 吸附 机制 

分 类 号：O614.5[理学—无机化学]