The effect of temperature and concentration of Aspergillus fumigatus on chlorpyrifos removal

Abstract

Abstract Chlorpyrifos is a toxic organophosphate type of insecticide with a molecular formula of C9H11Cl3NO3PS. Bioremediation is an environmental friendly method used to combat this insecticide through microbial enzymatic activity. This study therefore aims to eliminate chlorpyrifos with temperature variations and concentrations of Aspergillus fumigatus. Aspergillus fumigatus fungi acts as bioremedian to degrade the activity of chlorpyrifos using temperature ranges of 25-35oC at a 0.5-1.5% concentration rate. However, using the Gas-Chromatography Mass Spectrometer (GC-MS) method, optimum chlorpyrifos degradation was achieved at 25oC with a 1.5% concentration for 5 days in potato dextrose broth (PDB) liquid media. This shows that A. fumigatus has the ability to remove chlorpyrifos with an efficiency of 95.92% from its initial concentration of 80 ppm.