title: Effective removal of Congo red dye from aqueous solution using modified xanthan gum/silica hybrid nanocomposite as adsorbent.
abstract: The aim of this work is to study the feasibility of XG-g-PAM/SiO2 nanocomposite towards its potential application as high performance adsorbent for removal of Congo red (CR) dye from aqueous solution. The surface area, average pore size and total pore volume of the developed nanocomposite has been determined. The efficiency of CR dye adsorption depends on various factors like pH, temperature of the solution, equilibrium time of adsorption, agitation speed, initial concentration of dye and adsorbent dosage. It has been observed that the nanocomposite is having excellent CR dye adsorption capacity (Q0=209.205 mg g(-1)), which is considerably high. The dye adsorption process is controlled by pseudo-second order and intraparticle diffusion kinetic models. The adsorption equilibrium data correlates well with Langmuir isotherm. Desorption study indicates the efficient regeneration ability of the dye loaded nanocomposite.
authors.affiliation: Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad, India.
authors.forename: Soumitra
authors.initials: S
authors.lastname: Ghorai
authors.forename: Amit Kumar
authors.initials: AK
authors.lastname: Sarkar
authors.forename: A B
authors.initials: AB
authors.lastname: Panda
authors.forename: Sagar
authors.initials: S
authors.lastname: Pal
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000327:Adsorption; D004396:Coloring Agents / Q000737:chemistry / Q000302:isolation & purification*; D003224:Congo Red / Q000737:chemistry / Q000302:isolation & purification*; D007700:Kinetics; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D011135:Polysaccharides, Bacterial / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D012996:Solutions; D013696:Temperature; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D004396:Coloring Agents; D003224:Congo Red; D011135:Polysaccharides, Bacterial; D012822:Silicon Dioxide; D012996:Solutions; D014874:Water Pollutants, Chemical; D000099166:Polyacrylamides; C002563:xanthan gum
keywords: Adsorption; Congo red dye; Isotherm; Kinetics; Nanocomposite