Experimental and mathematical modeling of Cr(Ⅵ) removal using nano-magnetic Fe3O4-coated perlite from the liquid phase  

作　　者：Ismail M.Ahmed Mostafa M.Hamed Sayed S.Metwally 

机构地区：[1]Chemistry Department,College of Science,Jouf University,Skaka,Saudi Arabia [2]Hot Laboratories and Waste Management Center,Atomic Energy Authority,13759 Cairo,Egypt

出　　处：《Chinese Journal of Chemical Engineering》2020年第6期1582-1590,共9页中国化学工程学报（英文版）

摘　　要：Modification of perlite using nano-magnetic iron oxide was implemented to produce nano-magneticFe3O4-coated perlite composite(Fe3O4/Perlite).The prepared composite was characterized using Scanning Electron Microscopy,Fourier-Transform Infrared spectroscopy and Powder X-ray Fluorescence.The potentiality of both perlite and Fe3O4/Perlite composite to eliminate Cr(VI)from the environmentally relevant water was investigated.The influence of main factors which could affect the adsorption was studied including;pH of medium,shaking time and Cr(VI)ions concentration.The experimental outcome demonstrated that the modification of perlite by nano-magnetic Fe3O4 showed a significantly enhanced Cr(VI)removal efficiency relative to that of unmodified perlite.From the kinetic studies,the experimental data fitted well with the pseudo-second-order model.Moreover,it proposes that Langmuir isotherm is more adequate than the Freundlich isotherm for both perlite and modified perlite.The results recommended that Fe3O4/Perlite composite had a great potential as an economic and efficient adsorbent of Cr(VI)from contaminated water,which has huge application potential.

关 键 词：Nano-magnetic Composite Kinetics ISOTHERM PERLITE Adsorption 

分 类 号：X52[环境科学与工程—环境工程] O647.3[理学—物理化学]