Cr(VI) Removal from Aqueous Solution Using Alive Bloom Algae Biomass

Bloom algae biomass was collected and employed as adsorbent for Cr(Ⅵ) removal from aqueous solution.The tests indicate that temperature has no significant influence on adsorption efficiency,while pH of aqueous solution has a strict negative relation with removal rate of Cr(Ⅵ).The final concentration of Cr(Ⅵ) was reduced to 0.45 mg/L amounting to98.5% removal rate of initial 30.0 mg/L Cr( Ⅵ) at 25 ℃ and pH 5.0 after twice repeated adsorptions using 5.0 g/L algae biomass.Further analysis finds that concentration of Cr(Ⅲ) increased with adsorption process and reached the value of total content of Cr gradually,indicating redox reaction occurred on the surface of algae cells and Cr(Ⅲ) was generated from Cr(Ⅵ)partly.The study indicates that bloom algae biomass could be used as a low-cost bio-adsorption materials for Cr(Ⅵ) removal from wastewater.