title: Removal of aqueous Hg(II) and Cr(VI) using phytic acid doped polyaniline/cellulose acetate composite membrane.
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.
authors.affiliation: MOE, Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Dalian, China.
authors.forename: Renjie
authors.initials: R
authors.lastname: Li
authors.affiliation: MOE, Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Dalian, China; School of Food and Environmental Science and Technology, Dalian University of Technology, Panjin, China. Electronic address: lifenliu@dlut.edu.cn.
authors.forename: Lifen
authors.initials: L
authors.lastname: Liu
authors.affiliation: MOE, Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Dalian, China.
authors.forename: Fenglin
authors.initials: F
authors.lastname: Yang
mesh_terms: D000327:Adsorption; D000814:Aniline Compounds / Q000737:chemistry*; D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D002857:Chromium / Q000302:isolation & purification*; D007700:Kinetics; D008567:Membranes, Artificial; D008628:Mercury / Q000302:isolation & purification*; D008855:Microscopy, Electron, Scanning; D010833:Phytic Acid / Q000737:chemistry*; D013052:Spectrometry, X-Ray Emission; D017550:Spectroscopy, Fourier Transform Infrared; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000302:isolation & purification
chemical_list: D000814:Aniline Compounds; D008567:Membranes, Artificial; D014874:Water Pollutants, Chemical; C416807:polyaniline; D002857:Chromium; C005062:acetylcellulose; D010833:Phytic Acid; D002482:Cellulose; D008628:Mercury
keywords: Adsorption; Cellulose acetate; Cr(VI); Hg(II); Polyaniline