title: Adsorption of As(III), As(V) and Cu(II) on zirconium oxide immobilized alginate beads in aqueous phase.
abstract: A composite adsorbent to remove arsenite [As(III)], arsenate [As(V)], and copper [Cu(II)] from aqueous phase was synthesized by immobilizing zirconium oxide on alginate beads (ZOAB). The composition (wt%) of ZOAB (Zr-34.0; O-32.7; C-21.3; Ca-1.0) was confirmed by energy dispersive X-ray (EDX) analysis. Sorption studies were conducted on single and binary sorbate systems, and the effects of contact time, initial adsorbate concentration, and pH on the adsorption performance of ZOAB (pHPZC = 4.3) were monitored. The sorption process for As(III)/As(V) and Cu(II) reached an equilibrium state within 240 h and 24 h, respectively, with maximum sorption capacities of 32.3, 28.5, and 69.9 mg g(-1), respectively. The addition of Cu(II) was favorable for As(V) sorption in contrast to As(III). In the presence of 48.6 mg L(-1) Cu(II), the sorption capacity of As(V) increased from 1.5 to 3.8 mg g(-1) after 240 h. The sorption data for As(III)/As(V) and Cu(II) conformed the Freundlich and Langmuir isotherm models, respectively. The adsorption of As(III), As(V), and Cu(II) followed pseudo second order kinetics. The effect of arsenic species on Cu(II) sorption was insignificant. The results of present study demonstrated that the synthesized sorbent could be useful for the simultaneous removal of both anionic and cationic contaminants from wastewaters.
authors.affiliation: Department of Natural Resources and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, South Korea.
authors.forename: Oh-Hun
authors.initials: OH
authors.lastname: Kwon
authors.affiliation: Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, South Korea. Electronic address: jk120@hanyang.ac.kr.
authors.forename: Jong-Oh
authors.initials: JO
authors.lastname: Kim
authors.affiliation: Department of Energy and Environment, Sejong University, Seoul 143-747, South Korea.
authors.forename: Dong-Wan
authors.initials: DW
authors.lastname: Cho
authors.affiliation: Department of Natural Resources and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, South Korea.
authors.forename: Rahul
authors.initials: R
authors.lastname: Kumar
authors.affiliation: Mine Reclamation Corporation, Coal Center, 2 Segye-ro, Wonju, Gangwon-do 16464, South Korea.
authors.forename: Seung Han
authors.initials: SH
authors.lastname: Baek
authors.affiliation: Department of Natural Resources and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, South Korea.
authors.forename: Mayur B
authors.initials: MB
authors.lastname: Kurade
authors.affiliation: Department of Natural Resources and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, South Korea. Electronic address: bhjeon@hanyang.ac.kr.
authors.forename: Byong-Hun
authors.initials: BH
authors.lastname: Jeon
mesh_terms: D000327:Adsorption; D000464:Alginates / Q000737:chemistry*; D001149:Arsenates / Q000737:chemistry; D001151:Arsenic / Q000737:chemistry*; D018053:Arsenites / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007477:Ions; D007700:Kinetics; D008855:Microscopy, Electron, Scanning; D017550:Spectroscopy, Fourier Transform Infrared; D055672:Static Electricity; D062065:Wastewater / Q000737:chemistry; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry; D018508:Water Purification / Q000379:methods*; D015040:Zirconium / Q000737:chemistry*
chemical_list: D000464:Alginates; D001149:Arsenates; D001151:Arsenic; D018053:Arsenites; D003300:Copper; D020723:Glucuronic Acid; D006603:Hexuronic Acids; D007477:Ions; D062065:Wastewater; D014867:Water; D014874:Water Pollutants, Chemical; D015040:Zirconium; C015001:arsenite; C025657:arsenic acid; C028541:zirconium oxide
keywords: Adsorption; Alginate beads; Arsenic; Copper; Zirconium oxide