Effective removal of mercury(II) ions from chlor-alkali industrial wastewater using 2-mercaptobenzamide modified itaconic acid-grafted-magnetite nanocellulose composite.
A novel adsorbent, 2-mercaptobenzamide modified itaconic acid-grafted-magnetite nanocellulose composite [P(MB-IA)-g-MNCC] was synthesized for adsorbing mercury(II) [Hg(II)] ions selectively from aqueous solutions. Fourier transforms infrared spectroscopy, X-ray diffraction, scanning electron microscopy and thermogravimetric studies were performed to characterize the adsorbent. The optimum pH for Hg(II) adsorption was found to be 8.0, and the adsorption attained equilibrium within 60 min. The kinetic data were found to follow pseudo-second-order which assumes the ion exchange followed by complexation mechanism. The temperature dependence indicates an exothermic process. The well agreement of equilibrium data with Freundlich adsorption model confirms the multilayer coverage of Hg(II) onto P(MB-IA)-g-MNCC. The maximum adsorption capacity was found to be 240.0 mg/g. Complete removal of Hg(II) from aqueous solution was possible with an adsorbent dosage of 2.0 g/L. Spent adsorbent was effectively degenerated with 0.1M HCl. The present investigation shows that P(MB-IA)g-MNCC is a promising adsorbent for the removal and recovery of Hg(II) ions from aqueous solutions.
['Anirudhan|T S|TS|', 'Shainy|F|F|']
D000327:Adsorption D001562:Benzimidazoles D002482:Cellulose D005609:Free Radicals D006863:Hydrogen-Ion Concentration D007474:Ion Exchange D007477:Ions D007700:Kinetics D058185:Magnetite Nanoparticles D008628:Mercury D008855:Microscopy, Electron, Scanning D053761:Nanocomposites D017550:Spectroscopy, Fourier Transform Infrared D055672:Static Electricity D013386:Succinates D013696:Temperature D013816:Thermodynamics D013818:Thermogravimetry D062065:Waste Water D014874:Water Pollutants, Chemical D018508:Water Purification D014961:X-Ray Diffraction
Nanocellulose Adsorption kinetics Desorption Graft co-polymerization Isotherm Magnetite nanocellulose