Science Target Conference Systems, Ajman 4th International Environment Conference 2016

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Study on removal of Cr(VI) from wastewater by dead and alive biomass
Mohammad - Pazouki

Last modified: 2015-10-01

Abstract


In this research removal of hexavalent chromium from wastewater was studied by dead and live biomass of Aspergillus niger isolated from pistachio shell. Live biomass was investigated for chromum removal in different concentrations of Cr (VI) ranging from 50 to 600 mg/l and at different detention times and pH levels. Biomass in 5 g/l could biosorb above 95% of Cr (VI). from400 mg/l  up to  600 mg/l of Cr(VI) concenttrations, The removal efficiency was reduced to 6%  at above  600 mg/l of Cr(VI). The same experiments were held for dead biomass at various concentrations of Cr(VI).. The results showes that  the  dead biomass could almost remove 100% of Cr(VI) ions from an aqueous solution of 800 mg/l of Cr (VI) at 45 °C and pH 3 after 24 h. The Experiments showes that in concentrations of Cr (VI) less than 400 mg/l, the live biomass of Aspergillus niger was more effective than the dead biomass however at higher concentrations  the dead biomass was a better option.