title: Removal of crystal violet from water by magnetically modified activated carbon and nanomagnetic iron oxide.
abstract: Magnetically modified activated carbon, which synthesized by nanomagnetic iron oxide, was used for fast and effective removal of Crystal Violet from aqueous solutions. The scanning electron microscopy (SEM) images of nano-adsorbent showed that the average sizes of adsorbent are less than 100 nm. The various parameters, affecting on adsorption process, were examined including pH and temperature of dye solution, dose of adsorbent, and contact time. Then, thermodynamic parameters of sorption were calculated. Langmuir and Freundlich isotherms were used to fit the resulting data. Adsorption kinetics was consistent with a pseudo second order equation. Thermodynamic parameters of adsorption, ∆H(0), and ∆S(0) were calculated. Also, for further investigations, nano magnetic iron oxides was synthesized and used as adsorbent. Sorption capacities were depending on the temperature varied from 44.7 to 67.1 mg/g and from 12.7 to 16.5 mg/g for magnetically modified activated carbon and nanomagnetic iron oxide, respectively.
authors.affiliation: Payam Noor University of Varamin, Qarchak, Varamin, Tehran Iran.
authors.forename: Soheila
authors.initials: S
authors.lastname: Hamidzadeh
authors.affiliation: Faculty of Health, Safety and Environment, Shahid Beheshti University of Medical sciences, P. O. Box 16858-116, Tehran, Iran.
authors.forename: Marzieh
authors.initials: M
authors.lastname: Torabbeigi
authors.affiliation: Department of Occupational Health Engineering, School of Public Health, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, 14155-6446 Iran.
authors.forename: Seyed Jamaleddin
authors.initials: SJ
authors.lastname: Shahtaheri
keywords: Crystal Violet; Freundlich isotherm; Langmuir isotherm; Magnetically modified activated carbon; Nano magnetic iron oxide