Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 187, Issue 1-3, Pages 311-317Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2011.01.026
Keywords
Anodic aluminum oxide; Polyrhodanine; Nano filter; Heavy metal ions; Heavy metal removal
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Funding
- Ministry of Education, Science and Technology [R31-10013]
- National Research Foundation of Korea [R31-2011-000-10013-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Polyrhc danine 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. (C) 2011 Elsevier B.V. All rights reserved.
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