title: Anionically functionalized guar gum embedded with silica nanoparticles: An efficient nanocomposite adsorbent for rapid adsorptive removal of toxic cationic dyes and metal ions.
abstract: In the present work, a novel biodegradable nanocomposite has been developed (h-GG/SiO2) based on anionically modified guar gum and in-situ deposited SiO2NPs through sol-gel technique. Here the anionically modified guar gum stimulates the silica polymerization process and hence acts as a unique template for the development of spherical SiO2NPs. Batch adsorption studies indicate that h-GG/SiO2nanocomposite shows remarkable adsorption capacity for cationic dyes/metal ions (Qmax: 781.25mgg-1for malachite green (MG), 281.69mgg-1for safranin (SF); 645.16mgg-1for Pb2+, 709.21mgg-1for Cd2+) as well as it efficiently and selectively removes cationic MG from mixture of dye solutions. Finally the worthy regenerative efficacy of h-GG/SiO2facilitates the adsorbent to be economically promising for practical application in the field of wastewater management.
authors.affiliation: Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian Institute of Technology (ISM), Dhanbad 826004, India; Tata Steel R&D, Jamshedpur 831007, India.
authors.forename: Abhay Shankar
authors.initials: AS
authors.lastname: Patra
authors.affiliation: Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian Institute of Technology (ISM), Dhanbad 826004, India; Tata Steel R&D, Jamshedpur 831007, India.
authors.forename: Soumitra
authors.initials: S
authors.lastname: Ghorai
authors.affiliation: Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian Institute of Technology (ISM), Dhanbad 826004, India.
authors.forename: Debabrata
authors.initials: D
authors.lastname: Sarkar
authors.affiliation: Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian Institute of Technology (ISM), Dhanbad 826004, India; Department of Civil and Chemical Engineering, University of South Africa (UNISA), South Africa.
authors.forename: Raghunath
authors.initials: R
authors.lastname: Das
authors.affiliation: Tata Steel R&D, Jamshedpur 831007, India.
authors.forename: Supriya
authors.initials: S
authors.lastname: Sarkar
authors.affiliation: Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian Institute of Technology (ISM), Dhanbad 826004, India. Electronic address: sagarpal1@hotmail.com.
authors.forename: Sagar
authors.initials: S
authors.lastname: Pal
mesh_terms: D000327:Adsorption; D000838:Anions / Q000737:chemistry; D002412:Cations / Q000737:chemistry; D004396:Coloring Agents / Q000737:chemistry* / Q000302:isolation & purification; D005685:Galactans / Q000737:chemistry*; D008351:Mannans / Q000737:chemistry*; D008670:Metals / Q000737:chemistry / Q000302:isolation & purification; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D053149:Plant Gums / Q000737:chemistry*; D012394:Rosaniline Dyes / Q000737:chemistry / Q000302:isolation & purification; D012822:Silicon Dioxide / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D000838:Anions; D002412:Cations; D004396:Coloring Agents; D005685:Galactans; D008351:Mannans; D008670:Metals; D053149:Plant Gums; D012394:Rosaniline Dyes; D014874:Water Pollutants, Chemical; C005095:malachite green; D012822:Silicon Dioxide; C007894:guar gum
keywords: Adsorption; Guar gum; Nanocomposite; Sol-gel