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Removal of Arsenic Using Acetobacter xylinum Cellulose

Rezaee Abbas نويسنده , Asadikaram Gholamreza نويسنده , Mirzai Mohammad نويسنده , Naimi Nayera نويسنده , Dargahi Rosa نويسنده , Sadegi Abbas نويسنده

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The removal of Arsenic from solutions using adsorption in Acetobacter xylinum cellulose is described. The adsorption was determined, along with the effect of different variables, such as adsorbent dose, reaction time, arsenic concentration and pH, on the efficiency of arsenic removal. It was concluded that the adsorption is fast and improved under conditions of alkalinity. The kinetic experiments showed that the process equilibrium was reached quickly as a function of pH and less than 10 µg L-1 was achieved from an initial concentration of 100 µg L-1. It was found that the equilibrium dependence between adsorption capacity and bulk metal ion concentration could be described with the isotherm. In the isotherm studies, the observed data fitted well with both the Freundlich and the Langmuir models. The adsorption mechanism is a result of complex formation between arsenic and the microbial cellulose. A selective desorption can be carried out using a 1 mol L-1 phosphoric acid solution. The microbial cellulose was found to be a very efficient adsorbent.

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