title: Fabrication and characterization of chitosan-crosslinked-poly(alginic acid) nanohydrogel for adsorptive removal of Cr(VI) metal ion from aqueous medium.
abstract: In this study, chitosan-crosslinked-poly (alginic acid) nanohydrogel (CN-cl-PL(AA)NHG) was synthesized by co-polymerization method. It was used an effective adsorbent for the exclusion of Cr(VI) metal ion from aqueous medium. The synthesized nanohydrogel was characterized by FTIR, SEM and TEM. The TEM images clearly indicated the appearance of smooth surface with average size of particles ranging from 30 to 80nm. The effect of different adsorption parameters like agitation time, temperature, initial metal ion concentration and adsorbent dosage was studied and optimized. The results demonstrated that the prepared chitosan-crosslinked-poly (alginic acid) nanohydrogel had high adsorption tendency for the removal of Cr(VI) from the aqueous solution. The pseudo-second-order equation represented the better adsorption kinetics for the adsorption process. The thermodynamic studies showed the adsorption of Cr(VI) onto CN-cl-PL(AA)NHG was spontaneous and chemical in nature.
authors.affiliation: School of Chemistry, Shoolini University, Solan 173212, Himachal Pradesh, India. Electronic address: gaurav8777@gmail.com.
authors.forename: Gaurav
authors.initials: G
authors.lastname: Sharma
authors.affiliation: Department of Chemistry, College of Science, Bld.#5, King Saud University, Riyadh, Saudi Arabia.
authors.forename: Mu
authors.initials: M
authors.lastname: Naushad
authors.affiliation: Department of Petroleum and Chemical Engineering, Faculty of Engineering, Sultan Qaboos University, Muscat, Oman.
authors.forename: Ala'a H
authors.initials: AH
authors.lastname: Al-Muhtaseb
authors.affiliation: School of Chemistry, Shoolini University, Solan 173212, Himachal Pradesh, India.
authors.forename: Amit
authors.initials: A
authors.lastname: Kumar
authors.affiliation: Department of Chemistry, College of Science, Bld.#5, King Saud University, Riyadh, Saudi Arabia.
authors.forename: Mohammad Rizwan
authors.initials: MR
authors.lastname: Khan
authors.affiliation: Department of Chemistry, Army Cadet College Wing, Indian Military Academy, Dehradun, 248007, India.
authors.forename: Susheel
authors.initials: S
authors.lastname: Kalia
authors.affiliation: School of Chemistry, Shoolini University, Solan 173212, Himachal Pradesh, India.
authors.lastname: Shweta
authors.affiliation: School of Chemistry, Shoolini University, Solan 173212, Himachal Pradesh, India.
authors.forename: Manju
authors.initials: M
authors.lastname: Bala
authors.affiliation: School of Chemistry, Shoolini University, Solan 173212, Himachal Pradesh, India.
authors.forename: Arush
authors.initials: A
authors.lastname: Sharma
mesh_terms: D000327:Adsorption; D000464:Alginates / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry* / Q000302:isolation & purification*; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D020100:Hydrogels / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D049329:Nanostructures / Q000737:chemistry*; D013696:Temperature; D013816:Thermodynamics; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification; D018508:Water Purification
chemical_list: D000464:Alginates; D006603:Hexuronic Acids; D020100:Hydrogels; D014874:Water Pollutants, Chemical; D014867:Water; D002857:Chromium; C074702:chromium hexavalent ion; D020723:Glucuronic Acid; D048271:Chitosan
keywords: Adsorption; Alginic acid; Chitosan; Cr(VI); Kinetics; Nanohydrogel