title: Removal of Cr(VI) from aqueous solution using chitosan-g-poly(butyl acrylate)/silica gel nanocomposite.
abstract: The present work deals with the preparation of the novel sorbent, glutaraldehye crosslinked silica gel/chitosan-g-poly(butyl acrylate) (Cs-g-PBA/SG) nanocomposite by sol-gel method for removal of toxic chromium ion. Prepared nanosorbent was then characterized by FTIR, XRD, DLS, SEM, BET isotherm for its formation and suitability. Its sorption capacity and sorption isotherms were brought under batch mode to suit the optimal parameters viz., contact time, pH, adsorbent dose and initial metal ion concentration which influence the sorption. The theoretical modeling such as Langmuir and Freundlich isotherm adsorption were applied to describe isotherm constants. Equilibrium data agreed well with the Langmuir isotherm model (R(2)=0.9763) with maximum adsorption capacity of 55.71 (mg/g). The kinetic studies showed that the adsorption follows the pseudo-second-order kinetics (R(2)=0.9999). From the results, it was concluded that Cs-g-PBA/SG nanocomposite is an excellent biosorbent for Cr removal from wastewater.
authors.affiliation: P.G and Research Department of Chemistry, D.K.M College for Women, Vellore, Tamil Nadu, India.
authors.forename: R
authors.initials: R
authors.lastname: Nithya
authors.affiliation: P.G and Research Department of Chemistry, D.K.M College for Women, Vellore, Tamil Nadu, India.
authors.forename: Thandapani
authors.initials: T
authors.lastname: Gomathi
authors.affiliation: P.G and Research Department of Chemistry, D.K.M College for Women, Vellore, Tamil Nadu, India. Electronic address: drparsu8@gmail.com.
authors.forename: P N
authors.initials: PN
authors.lastname: Sudha
authors.affiliation: Marine Bioprocess Research Center and Department of Marine Bio-Convergence Science, Pukyong National University, Busan 608-737, South Korea; Visiting Professor, King Saud University, Riyadh 12372, Saudi Arabia.
authors.forename: Jayachandran
authors.initials: J
authors.lastname: Venkatesan
authors.affiliation: College of Dentistry, Jazan University, P.O. Box 114, Jazan 45142, Saudi Arabia.
authors.forename: Sukumaran
authors.initials: S
authors.lastname: Anil
authors.affiliation: Marine Bioprocess Research Center and Department of Marine Bio-Convergence Science, Pukyong National University, Busan 608-737, South Korea.
authors.forename: Se-Kwon
authors.initials: SK
authors.lastname: Kim
mesh_terms: D000179:Acrylates / Q000737:chemistry*; D000327:Adsorption; D048271:Chitosan / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry / Q000302:isolation & purification*; D004058:Diffusion; D005976:Glutaral / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D053761:Nanocomposites / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D058428:Silica Gel / Q000737:chemistry*; D012996:Solutions; D013997:Time Factors; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods*
chemical_list: D000179:Acrylates; D011108:Polymers; D012996:Solutions; D014874:Water Pollutants, Chemical; C498324:poly(n-butyl acrylate); D014867:Water; D002857:Chromium; C074702:chromium hexavalent ion; D058428:Silica Gel; D048271:Chitosan; D005976:Glutaral
keywords: Grafted chitosan; Isotherm; Kinetics; Silica gel