Bioremediation of Crystal Violet by Organic Matter and Assessment of Antimicrobial Properties of the Obtained Product

The study investigated the waste beet pulp shreds for the use as a sorbent for removing crystal violet dye from aqueous solutions and investigating the antimicrobial properties of the obtained material. During the preparation of the BPSCV (beet pulp shreds with adsorbed crystal violet) material, the equilibrium and kinetic studies of the crystal violet dye (CV) sorption process on BPS were carried out. The equilibrium tests allowed for the selection of the best-fitted isotherm model and the determination of the sorption capacity of the material. It turned out that the Langmuir isotherm model had the best fit (R2 > 0.98) and the sorption capacity equaled 28.07 mg/g. The pseudo-second-order model R2 > 0.999 (obtained from kinetic studies) and FT-IR analysis confirmed that the sorption process of the CV on BPS is chemical. The minimal growth inhibition antimicrobial tests showed that the obtained material inhibits the growth of chosen microorganisms. Escherichia coli (MIC = 500 ppm) and Pseudomonas aeruginosa (MIC = 300 ppm) are more resistant to BPSCV than Candida albicans and Staphylococcus aureus (MIC = 100 ppm).