Abstract:

Polyaniline/attapulgite(PANI/ATP) nanofiber composites doped with hydrochloric acid were prepared by an in situ polymerization method and used for the absorbent of trace Cr(Ⅵ) in effluents of various wastewater. The effects of the mass ratio of the nanocomposite to the aqueous solution, the quality of the PANI/ATP nanofiber composite, adsorptive time and temperature as well as pH value in the solution on the adsorptive performance of PANI/ATP nanofiber composite were investigated. The results indicated that nearly 99.8% of Cr(Ⅵ) could be removed from the solution by PANI/ATP nanofiber composite when the mass ratio of the materials is 2∶1, the quality is 0.4 g, the time is 50 min. The adsorption follows the Langmuir adsorption isotherm. Having the synergetic adsorption capacity originated from its organic and inorganic components, PANI/ATP nanofiber composite is a promising adsorbent for Cr(Ⅵ) because of its high efficiency, cost efficiency and regeneracy.

Key words: composite material of PANI/ATP, trace quantity of Cr (VI, adsorption