화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.21, 561-568, January, 2015
DOI10.1016/j.jiec.2014.03.019  Export Citation
Highly efficient removal of three red dyes by adsorption onto Mg-Al-layered double hydroxide
Ran-ran Shan, Liang-guo Yan†, Yan-ming Yang1, Kun Yang, Shu-jun Yu, Hai-qin Yu, Bao-cun Zhu, and Bin Du
  • School of Resources and Environment, University of Jinan, Jinan 250022, PR China
  • 1Shandong Cadre Institute of Science & Technology, Jinan 250014, PR China
E-mail:
The Mg-Al-CO3-LDH with Mg2+/Al3+ molar ratio of 2 was prepared via coprecipitation method at constant pH of 9-10 and used to remove three red dyes by batch adsorption method. The results showed the Mg-Al-LDH were well crystallized and can adsorb the red dyes effectively. The optimal adsorbent dosage and contact time were 1.0 g and 60 min, respectively. Adsorbed amount hardly changed when pH < 10. The adsorption kinetics fit the pseudo-second order kinetic models well and isotherms correspond to Langmuir model strictly. All the relevant mechanisms were studied and manifested as anion exchange and also electrostatic attraction for CR.
Keywords:Adsorption kinetics;Adsorption isotherm;Reactive red;Congo red;Acid red 1
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