REMOVAL OF MERCURY(II) BY ACTIVATED CARBON FROM WASTE ABELMOSCHUS MANIHOT
Adsorption capacity of Hg(Ⅱ) on activated carbon of Abelmoschus manihot (AC-AM) is investigated in a batch system by considering the effect of various parameters; viz: initial solution pH, adsorbent dose and contact time. The removal of Hg(Ⅱ) is pH dependent and uptake of metal is observed to be maximum at pH 6.0. The adsorption parameters are determined using Freundlich, Langmuir, Dubinin-Redushkevich (D-R) and Temkin isotherm models. Langmuir isotherm shows better fit than other isotherms and the monolayer adsorption capacity obtained is 111.11 mg/g. The kinetic data are analyzed using pseudo-first order, pseudo-second order and intraparticle diffusion models. The data are fitted to the isotherm models by non-linear regression method and the goodness of the fit is evaluated. The kinetics study shows that in the present case adsorption data are following the pseudo-second order kinetics. Also, the process is controlled by both intraparticle and film-diffusion mechanisms.
Adsorption Abelmoschus manihot mercury isotherm kinetics diffusion
Z. V. P. Murthy Parimal A. Parikh Nilamkumar B. Patel
Department of Chemical Engineering, S.V. National Institute of Technology Surat – 395007, Gujarat, India
国际会议
北京
英文
1081-1092
2010-05-17（万方平台首次上网日期，不代表论文的发表时间）