화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.38, No.3, 505-513, March, 2021
DOI10.1007/s11814-020-0706-z  Export Citation
Adsorption performance and mechanism investigation of Mn2+ by facile synthesized ceramsites from lime mud and coal fly ash
Changjin Ou, Suwan Dai, Shuxuan Li, Jie Xu, and Juan Qin††
  • Nantong Key Laboratory of Intelligent and New Energy Materials, School of Chemistry and Chemical Engineering, Nantong University,, Nantong 222100, China
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To efficiently control manganese pollution, two kinds of ceramsites with pH self-adjustment ability, being synthesized from lime mud and coal fly ash, were employed to remove Mn2+ from aqueous solutions. The influence of different parameters like contact time, concentration of Mn2+ and pH on adsorption performance was examined. Also, the mechanism of Mn2+ removal by the ceramsites was investigated thoroughly. The results showed that the maximum Mn2+ adsorption capacity of ceramsites was 2.54±0.03mg/g and the time required to reach equilibrium was about 4h. The pseudo-second-order kinetic model and the Langmuir model could better describe the adsorption kinetic experimental data and isotherms process, respectively. During the adsorption process of Mn2+, pH self-adjustment ability of ceramsites played a leading role in creating an alkaline environment to form precipitation MnO(OH)2, which was subsequently adsorbed onto the surface of the ceramsites. This study suggests ceramsites with pH self-adjustment ability have enormous potential in the application for removing Mn2+ from wastewater.
Keywords:Adsorption;Mn2+ Removal;Ceramsites;pH self-adjustment;Lime Mud
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