Adsorption of Methylene Blue from Aqueous Solution Using Locust Bean Gum graft Copolymer-bentonite Composite
Issue: 2018 - Volume 6 [Issue 3]
Sirajo Abubakar Zauro *
Department of Post-Graduate Studies and Research in Chemistry, Mangalore University, Mangalagangothri, Karnataka, India AND Department of Pure and Applied Chemistry, Usmanu Danfodiyo University, Sokoto, Nigeria
Department of Post-Graduate Studies and Research in Chemistry, Mangalore University, Mangalagangothri, Karnataka, India
Haruna Shehu Ahmed
Nigeria Defence Academy, Kaduna, Nigeria
*Author to whom correspondence should be addressed.
A graft copolymer gel composite made up of locust bean gum (LBG), diallyldimethylammonium chloride (DADMAC), 2-acrylamido-2- methyl-1-propane sulfonic acid (AMPS) and bentonite (BNT) was prepared using methylenebisacrylamide (MBA) as crosslinker via microwave irradiation and characterised using FTIR, FESEM/EDS and XRD techniques. The graft ted copolymer composite was evaluated for its adsorption towards methylene blue (MB) dye. The LBG-g-poly (DADMAC-co-AMPS)/BNT showed a maximum adsorption of 70.89 mg/g compared to 65.09 mg/g showed by LBG-g-poly (DADMAC-co-AMPS). The adsorption data were subjected to two different isotherm models namely; Freundlich and Langmuir and were observed to be explained best by the Freundlich model. The adsorption of MB on the graft copolymer gel and the composite is observed to be a second-order kinetic process.
Keywords: Adsorption, bentonite, diallyldimethylammonium chloride, methylene blue, locust bean gum, 2-acrylamido-2-methyl-1-propane sulfonic acid