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Indexed by:期刊论文

Date of Publication:2014-09-15

Journal:JOURNAL OF HAZARDOUS MATERIALS

Included Journals:SCIE、EI、PubMed、Scopus

Volume:280

Page Number:20-30

ISSN No.:0304-3894

Key Words:Polyaniline; Cellulose acetate; Hg(II); Cr(VI); Adsorption

Abstract:Conductive composite membrane-phytic acid (PA) doped polyaniline (PANI)/cellulose acetate (CA) (PANI-PA/CA) was prepared in a simple and environmental-friendly method, in which aniline was blended with CA/PA solution and polymerized before the phase conversion. The resultant composite membranes were characterized by SEM, EDX, FTIR-ATR, BET and electrical resistance measurements. When used as adsorbent for Hg(II) and Cr(VI) ions, the prepared composite membrane exhibits excellent adsorption capability. The adsorption of Hg(II) and Cr(VI) follows a pseudo-second-order kinetic model and best fits the Langmuir isotherm model, with the maximum adsorption capacity reaching 280.11 and 94.34 mg g(-1), respectively. The heavy metal loaded composite membrane can be regenerated and reused after treatment with acid or alkali solution, making it a promising and practical adsorbent for Hg(II) and Cr(VI) removal. Tests with river water were also carried out, indicating good performance and application. (C) 2014 Elsevier B.V. All rights reserved.