title: Hydrazinolyzed cellulose-g-polymethyl acrylate as adsorbent for efficient removal of Cd(II) and Pb(II) ions from aqueous solution.
abstract: Hydrazinolyzed cellulose-graft-polymethyl acrylate (Cell-g-PMA-HZ), an efficient adsorbent for removal of Cd(II) and Pb(II) from aqueous solution, has been prepared by ceric salt-initiated graft polymerization of methyl acrylate from microcrystalline cellulose surface and subsequent hydrazinolysis. The influences of initial pH, contact time, and temperature on adsorption capacity of Cell-g-PMA-HZ as well as adsorption equilibrium, kinetic and thermodynamic properties were examined in detail. As for Cd(II) adsorption, kinetic adsorption can be explained by pseudo-second-order, while adsorption isotherm fits well with Langmuir isotherm model, from which maximum equilibrium adsorption capacity can be derived as 235.85 mg g-1at 28 °C. Further thermodynamic investigation indicated that adsorption of Cd(II) by adsorbent Cell-g-PMA-HZ is endothermic and spontaneous under studied conditions. On the other hand, isotherm of Pb(II) adsorption fits well with Freundlich isotherm model and is more likely to be a physical-adsorption-dominated process. Consecutive adsorption-desorption experiments showed that Cell-g-PMA-HZ is reusable with satisfactory adsorption capacity.
authors.affiliation: Marine College, Shandong University (Weihai), Weihai 264209, China E-mail: mengfj@sdu.edu.cn.
authors.forename: Qiujin
authors.initials: Q
authors.lastname: Jia
authors.affiliation: Marine College, Shandong University (Weihai), Weihai 264209, China E-mail: mengfj@sdu.edu.cn.
authors.forename: Wanting
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Marine College, Shandong University (Weihai), Weihai 264209, China E-mail: mengfj@sdu.edu.cn.
authors.forename: Dongping
authors.initials: D
authors.lastname: Li
authors.affiliation: Marine College, Shandong University (Weihai), Weihai 264209, China E-mail: mengfj@sdu.edu.cn.
authors.forename: Yulong
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Marine College, Shandong University (Weihai), Weihai 264209, China E-mail: mengfj@sdu.edu.cn.
authors.forename: Yuju
authors.initials: Y
authors.lastname: Che
authors.affiliation: Marine College, Shandong University (Weihai), Weihai 264209, China E-mail: mengfj@sdu.edu.cn.
authors.forename: Qinglin
authors.initials: Q
authors.lastname: Ma
authors.affiliation: Marine College, Shandong University (Weihai), Weihai 264209, China E-mail: mengfj@sdu.edu.cn.
authors.forename: Fanjun
authors.initials: F
authors.lastname: Meng
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000327:Adsorption; D002104:Cadmium / Q000302:isolation & purification*; D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry*; D006834:Hydrazines / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry; D007700:Kinetics; D007854:Lead / Q000302:isolation & purification*; D013696:Temperature; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D000180:Acrylic Resins; D006834:Hydrazines; D007477:Ions; D014874:Water Pollutants, Chemical; C000620715:cellulose-g-polymethyl acrylate; D002104:Cadmium; D007854:Lead; D002482:Cellulose