Identification and optimization of triphenylmethane dyes removal by Streptomyces sp. from forest soil

Abstract This study identified a common Streptomyces sp. (MN262194) from forest soil as an efficient decolorizer of triphenylmethane (TPM) dyes. Partial 16S rRNA sequencing the isolate possibly bacillaris (similarity 99.32%). Live and dead cells were applied to decolorize Malachite Green (MG), Methyl Violet (MV), Crystal (CV), Cotton Blue (CB). The decolorization efficacy for both cell types was further optimized based on One-Factor-At-A-Time (OFAT) method determine influence pH, agitation speed (rpm), biomass (g), initial dye concentration (mg L ? 1 ), oxygen. Removal TPM dyes repeated live using combined optimal conditions determined each type. Results revealed that optimum pH 7, 100 rpm agitation, 0.5 g biomass, mg (50 CB), with presence In contrast, 9 (MG, MV, CV) 3 (CB), 0.75 concentrations cells. At conditions, showed significantly higher activities all (MG 95%, MV 92%, CV 87%, CB 68%). via biosorption biodegradation, detected changes ultraviolet-visible spectra between untreated treated dye. Sorption by conforms Langmuir isotherm model. established effective most > 85% (with exception CB).