title: Amputation of congo red dye from waste water using microwave induced grafted Luffa cylindrica cellulosic fiber.
abstract: The present study deals with the surface modification of Luffa cylindrica fiber through graft copolymerization of methyl acrylate/acrylamide (MA/AAm) via microwave radiation without the use of initiator. Various reaction parameters effecting grafting yield were optimized and physico-chemical properties were evaluated. The grafted Luffa cylindrica fiber showed morphological transformations, thermal stability and chemical resistance. The adsorption potential of modified fiber was investigated using adsorption isotherms for hazardous congo red dye removal from aqueous system. The maximum adsorption capacity of dye onto grafted Luffa cylindrica fiber was found to be 17.39 mg/g with best fit for Langmuir adsorption isotherm. The values of thermodynamic parameters such as enthalpy change, ΔH(0) (21.27 kJ/mol), entropy change, ΔS(0) (64.71 J/mol K) and free energy change, ΔG(0) (-139.52 kJ/mol) were also calculated. Adsorption process was found spontaneous and endothermic in nature.
authors.affiliation: Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India. Electronic address: vinodfcy@gmail.com.
authors.forename: Vinod Kumar
authors.initials: VK
authors.lastname: Gupta
authors.affiliation: School of Chemistry, Shoolini University, Solan 173212, Himachal Pradesh, India. Electronic address: dpathania74@gmail.com.
authors.forename: Deepak
authors.initials: D
authors.lastname: Pathania
authors.affiliation: Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India.
authors.forename: Shilpi
authors.initials: S
authors.lastname: Agarwal
authors.affiliation: Department of Higher Education, Shimla, Himachal Pradesh, India.
authors.forename: Shikha
authors.initials: S
authors.lastname: Sharma
mesh_terms: D000327:Adsorption; D002482:Cellulose / Q000737:chemistry* / Q000648:ultrastructure; D003224:Congo Red / Q000302:isolation & purification*; D029776:Luffa / Q000737:chemistry*; D008872:Microwaves; D062065:Wastewater / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification
chemical_list: D002482:Cellulose; D003224:Congo Red; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Adsorption capacity; Graft copolymerization; Luffa cylindrica fiber; Physico-chemical properties; Thermodynamics