Use of Heat-killed Aspergillus ochraceus NRRL 3174 Discs as Biosorbent for petroleum Removal

Authors : Nermin Hande AVCİOGLU, Sezen BILEN OZYUREK, Işıl SEYİS BİLKAY

Pages : 219-228

Doi:10.17350/HJSE19030000310

View : 82 | Download : 42

Publication Date : 2023-09-30

Article Type : Research Paper

Abstract :The purpose of this work was to evaluate the petroleum sorption capacity of heat-killed fungal discs obtained from Aspergillus ochraceus strain. Effect of various parameters such as biosorbent dose insert ignore into journalissuearticles values(0.5g-2.5g/100mL);, petroleum concentration insert ignore into journalissuearticles values(0.5-5%);, pH insert ignore into journalissuearticles values(4.0-8.0);, contact time insert ignore into journalissuearticles values(1-12h); and re-usability of biosorbent insert ignore into journalissuearticles values(1-6); were investigated. Accordingly, the highest biosorption capacity was obtained with 1% petroleum concentration, 1.5 g/100mL heat-killed fungal discs, 10h contact time at pH: 5.0 and room temperature. Additionally, each disc was able to actively use for at least 6 more cycles in biosorption experiments. The specific removal rate was calculated as 0.114 day−1, the rate constant and half-life period were also 1.609 day-1, t1/2 = 0.431, respectively. The kinetic study was described by the pseudo-second order model and the equilibrium modeling was found to be well fitted with Langmuir isotherm. The biosorbentinsert ignore into journalissuearticles values(s); were characterized by Focused Ion Beam Scanning Electron Microscopy insert ignore into journalissuearticles values(FIB-SEM);. Over 80% removal of long-chain n-alkanes by the heat-killed fungal discs was confirmed by GC-MS analysis. Since there has been no similar study investigating the sorption of petroleum with heat-killed Aspergillus ochraceous discs, this novel bio-based sorbent with its low cost, environmentally friendly and easy-to-apply properties can be used in advanced biosorption studies.
Keywords : Petroleum, Biosorption, Heat killed Aspergillus ochraceus, Biosorption Isotherm and Kinetics