Bacterial assisted degradation of chlorpyrifos: The key role of environmental conditions, trace metals and organic solvents.
Wastewater from pesticide industries, agricultural or surface runoff containing pesticides and their residues has adverse environmental impacts. Present study demonstrates effect of petrochemicals and trace metals on chlorpyrifos (CP) biotransformation often released in wastewater of agrochemical industry. Biodegradation was investigated using bacterial strain Pseudomonas kilonensis SRK1 isolated from wastewater spiked with CP. Optimal environmental conditions for CP removal were CFU (306 × 10(6)), pH (8); initial CP concentration (150 mg/L) and glucose as additional carbon source. Among various organic solvents (petrochemicals) used in this study toluene has stimulatory effect on CP degradation process using SRK1, contrary to this benzene and phenol negatively inhibited degradation process. Application of metal ions (Cu (II), Fe (II) Zn (II) at low concentration (1 mg/L) took part in biochemical reaction and positively stimulated CP degradation process. Metal ions at high concentrations have inhibitory effect on degradation process. A first order growth model was shown to fit the data. It could be concluded that both type and concentration of metal ions and petrochemicals can affect CP degradation process.
['Khalid|Saira|S|', 'Hashmi|Imran|I|', 'Khan|Sher Jamal|SJ|']
D001673:Biodegradation, Environmental D004390:Chlorpyrifos D006801:Humans D007306:Insecticides D019216:Metals, Heavy D011549:Pseudomonas D012988:Soil Microbiology D012989:Soil Pollutants D012997:Solvents D014131:Trace Elements
Chlorpyrifos Trace metals Wastewater Petrochemicals Biodegradation