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Removal of chromium from aqueous solution using polyaniline - Poly ethylene glycol composite

Riahi Samani, M ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jhazmat.2010.08.029
  3. Publisher: 2010
  4. Abstract:
  5. The adsorption of chromium compounds from solutions by a composite of polyaniline/poly ethylene glycol (PANi/PEG) was investigated in this study. Experiments were conducted in batch mode under various operational conditions including agitation time, solution pH, PANi/PEG dose and initial concentration of chromium salts. Results showed that concentration of PEG at synthesizing stage has a significant effect on the capacity of produced composite for removal of chromium. Morphologically, PANi/PEG composite is closely dependent on the concentration of PEG. Maximum removal of hexavalent chromium was experienced when 2. g/L of PEG was used in synthesis of PANi/PEG. Removal of hexavalent chromium by PANi/PEG composite included surface adsorption and reduction reaction. The optimum pH was 5 and the equilibrium time for hexavalent chromium removal was about 30. min. Investigation of the isothermal characteristics showed that chromium adsorption by PANi/PEG composite was in high accordance with Langmuir's isotherm
  6. Keywords:
  7. Composite ; Polyaniline ; Agitation time ; Batch modes ; Chromium adsorption ; Chromium salts ; Hexavalent chromium ; Initial concentration ; Langmuir's isotherm ; Operational conditions ; Optimum pH ; Removal of chromium ; Solution pH ; Surface adsorption ; Chromium compounds ; Ethylene ; Ethylene glycol ; Pollution ; Surface reactions ; Synthesis (chemical) ; Chemicals removal (water treatment) ; Macrogol ; Chemical composition ; Experimental study ; Pollutant removal ; Reduction ; Aqueous solution ; Composite material ; Heavy metal removal ; Isotherm ; PH ; Scanning electron microscopy ; Adsorption ; Aniline Compounds ; Chromium ; Hydrogen-Ion Concentration ; Microscopy, Electron, Scanning ; Polyethylene Glycols ; Solutions ; Thermodynamics ; Water ; Water Pollutants, Chemical
  8. Source: Journal of Hazardous Materials ; Volume 184, Issue 1-3 , December , 2010 , Pages 248-254 ; 03043894 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0304389410010459