Kinetic analysis of trivalent chromium biosorption by dead streptomyces rimosus biomass

Abstract EN

-This work is a contribution to the use of natural, cost-effective biosorbent in industrial wastewater treatment processes, addressing more particularly the effluents resulting from the tanning industry.

A dead mycelial bacterial biomass (i.e.

Streptomyces rimosus) collected as waste from an antibiotic production plant was tested as a bio sorbent for chromium (III).

The results showed that trivalent chromium ion presents a good affinity with respect to the biomass.

In batch system, the best performance of chromium (III) was obtained at strongly acidic pH (around 4.8).

The sorption kinetics obeyed pseudo-second order model and film diffusion was the main limiting step in the bio sorption kinetics.

Applying the sips isotherm modeling ; the highest bio sorption efficiency was over 82 mg.g-1.