title: Efficient removal of malachite green dye using biodegradable graft copolymer derived from amylopectin and poly(acrylic acid).
abstract: This article reports on the application of a high performance biodegradable adsorbent based on amylopectin and poly(acrylic acid) (AP-g-PAA) for removal of toxic malachite green dye (MG) from aqueous solution. The graft copolymer has been synthesized and characterized using various techniques including FTIR, GPC, SEM and XRD analyses. Biodegradation study suggests that the co-polymer is biodegradable in nature. The adsorbent shows excellent potential (Qmax, 352.11 mg g(-1); 99.05% of MG has been removed within 30 min) for removal of MG from aqueous solution. It has been observed that point to zero charge (pzc) of graft copolymer plays significant role in adsorption efficacy. The adsorption kinetics and isotherm follow pseudo-second order and Langmuir isotherm models, respectively. Thermodynamics parameters suggest that the process of dye uptake is spontaneous. Finally desorption study shows excellent regeneration efficiency of adsorbent.
authors.affiliation: Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India.
authors.forename: Amit Kumar
authors.initials: AK
authors.lastname: Sarkar
authors.affiliation: Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India.
authors.forename: Aniruddha
authors.initials: A
authors.lastname: Pal
authors.affiliation: Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India.
authors.forename: Soumitra
authors.initials: S
authors.lastname: Ghorai
authors.affiliation: Department of Fuel & Mineral Engineering, Indian School of Mines, Dhanbad 826004, India.
authors.forename: N R
authors.initials: NR
authors.lastname: Mandre
authors.affiliation: Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India. Electronic address: sagarpal1@hotmail.com.
authors.forename: Sagar
authors.initials: S
authors.lastname: Pal
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000327:Adsorption; D000687:Amylopectin / Q000737:chemistry*; D004396:Coloring Agents / Q000302:isolation & purification*; D012394:Rosaniline Dyes / Q000302:isolation & purification*; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods
chemical_list: D000180:Acrylic Resins; D004396:Coloring Agents; D012394:Rosaniline Dyes; D014874:Water Pollutants, Chemical; C005095:malachite green; C006903:carbopol 940; D000687:Amylopectin
keywords: Adsorption; Graft copolymer; Malachite green dye; Poly(acrylic acid)