title: Removal of rhodamine B from aqueous solution by adsorption onto sodium montmorillonite.
abstract: The adsorption of rhodamine B dye was carried out using sodium montmorillonite clay. The effect of parameters such as pH, adsorbent dosage and initial dye concentration was studied. The Langmuir and Freundlich isotherm models were applied and the Langmuir model was found to best fit the equilibrium isotherm data. Langmuir adsorption capacity was found to be 42.19 mg/g. Kinetic data followed pseudo-second-order kinetics. Maximum color removal was observed at pH 7.0. The DeltaG degrees value was found to be negative, the adsorption process was feasible. The results indicate that sodium montmorillonite clay can be used for the removal of basic dyes from aqueous solutions.
authors.affiliation: Department of Chemical Engineering, A.C. College of Technology, Anna University, Guindy, Chennai 600025, Tamilnadu, India.
authors.forename: P Panneer
authors.initials: PP
authors.lastname: Selvam
authors.forename: S
authors.initials: S
authors.lastname: Preethi
authors.forename: P
authors.initials: P
authors.lastname: Basakaralingam
authors.forename: N
authors.initials: N
authors.lastname: Thinakaran
authors.forename: A
authors.initials: A
authors.lastname: Sivasamy
authors.forename: S
authors.initials: S
authors.lastname: Sivanesan
mesh_terms: D000327:Adsorption; D001546:Bentonite / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D012235:Rhodamines / Q000737:chemistry*; D012996:Solutions; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D004396:Coloring Agents; D012235:Rhodamines; D012996:Solutions; D014874:Water Pollutants, Chemical; D001546:Bentonite; C029773:rhodamine B