Abstract
Perylene (PRL), a five- ring nuclear polycyclic aromatic hydrocarbon (PAH) has attracted attention because of its toxic properties. This study aimed to evaluate the efficiency of yeast consortium YC02 to remediate PRL in presence of ZnO nanoparticles and produced biosurfactant in the growth medium. Response surface methodology (RSM), 3- level five variables Box-Behnken design (BBD) was employed to optimize the factors viz. pH 7.0, temperature 30ºC, shaking speed 130 rpm, inoculum dosage 3% and zinc oxide nanoparticles (ZnO) concentration 2 g L-1 after a period of 6 days of incubation for the enhanced degradation of PRL (74 ± 0.01%) using yeast consortium. It was well in close agreement with the predicated value obtained by RSM model yield (74 ± 0.8%). Analysis of variance (ANOVA) showed F-value of 58.13, R2 of 0.9790, probability of
Highlights
Perylene (PRL) (C10H12), as a representative of polycyclic aromatic hydrocarbons (PAHs) has been reported as hazardous pollutant (Donaldson et al, 1953)
This study aimed to evaluate the efficiency of yeast consortium YC02 to remediate PRL in presence of zinc oxide nanoparticles (ZnO) nanoparticles and produced biosurfactant in the growth medium
Anionic biosurfactant was produced by yeast consortium YC02 which could enhance the degradation of perylene (PRL) in the growth medium
Summary
Perylene (PRL) (C10H12), as a representative of polycyclic aromatic hydrocarbons (PAHs) has been reported as hazardous pollutant (Donaldson et al, 1953). There are many physico-chemical methods for remediation of PAHs which include chemical oxidation, photolysis, incineration, landfilling, volatilization and adsorption Applications of these methods are limited due to certain drawbacks such as high operating cost, formation of toxic products etc. No report is available on nanobioremediation of PRL in the presence of nanoparticles and produced biosurfactant in the medium using microbial consortium. Experiments were conducted to study the biodegradation of PRL using yeast consortium in presence of ZnO nanoparticles and produced biosurfactant in the growth medium. To the best of our knowledge, this is the first study in which process optimization has been done towards nanobioremediation of PRL using yeast consortium in presence of ZnO nanoparticles and produced biosurfactant in medium
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