title: Polyrhodanine modified anodic aluminum oxide membrane for heavy metal ions removal.
abstract: Polyrhodanine was immobilized onto the inner surface of anodic aluminum oxide (AAO) membrane via vapor deposition polymerization method. The polyrhodanine modified membrane was applied to remove heavy metal ions from aqueous solution because polyrhodanine could be coordinated with specific metal ions. Several parameters such as initial metal concentration, contact time and metal species were evaluated systematically for uptake efficiencies of the fabricated membrane under continuous flow condition. Adsorption isotherms of Hg(II) ion on the AAO-polyrhodanine membrane were analyzed with Langmuir and Freundlich isotherm models. The adsorption rate of Hg(II) ion on the membrane was obeyed by a pseudo-second order equation, indicating the chemical adsorption. The maximum removal capacity of Hg(II) ion onto the fabricated membrane was measured to be 4.2 mmol/g polymer. The AAO-polyrhodanine membrane had also remarkable uptake performance toward Ag(I) and Pb(II) ions. Furthermore, the polyrhodanine modified membrane could be recycled after recovery process. These results demonstrated that the polyrhodanine modified AAO membrane provided potential applications for removing the hazardous heavy metal ions from wastewater.
authors.affiliation: WCU Program of Chemical Convergence for Energy and Environment, School of Chemical and Biological Engineering, College of Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea.
authors.forename: Jooyoung
authors.initials: J
authors.lastname: Song
authors.forename: Hyuntaek
authors.initials: H
authors.lastname: Oh
authors.forename: Hyeyoung
authors.initials: H
authors.lastname: Kong
authors.forename: Jyongsik
authors.initials: J
authors.lastname: Jang
mesh_terms: D000327:Adsorption; D000537:Aluminum Oxide / Q000737:chemistry*; D004566:Electrodes; D008567:Membranes, Artificial; D019216:Metals, Heavy / Q000302:isolation & purification*; D012236:Rhodanine / Q000737:chemistry*
chemical_list: D008567:Membranes, Artificial; D019216:Metals, Heavy; D012236:Rhodanine; D000537:Aluminum Oxide