حذف سم دیازینون ازمحلولهای آبی به وسیله باکتریهای سودوموناس آئروژنوزا و اکتینومایست

Abstract Background and Objective: Diazinon, an organophosphate pesticides and insecticides, that most widely used in agriculture. water-containing Diazinon can bring about serious environmental problems and also have immediate or even delayed impacts on people’s health. In this paper, the level of removal of diazinon from aqueous solution by Pseudomonas and Actinomycetes bacteria was investigated.Method: This study was performed on laboratory scale. The experiments were conducted separately with changes in effective factors such as pH, diazinon concentration, bacterial concentration, and process time. At first, Actinomycetes and Pseudomonas, which had the highest resistance to diazinon, were isolated and detected from the diazinon-contaminated soils. Then, the minimum inhibitory concentration (MIC) of diazinon was determined for each of the bacteria. The biological absorption and biological elimination capacity in these bacteria were examined.Findings: The results showed that both bacteria were able to remove diazinon. The most effective biological elimination of diazinon is related to Pseudomonas mass live mass at 60h , ph=7 and reaction temperature of 35° Celsius and concentration of one ml/L Diazinon and live weight 9000mg with a yield of 96,66%.The results showed that both bacteria were able to remove diazinon. The most effective biological elimination of diazinon was related to pseudomonas mass after 60 hours and pH = 7, temperature of 35 ℃ and the concentration of one mg/L of diazinon and the live mass of 9000 mg with a 96.66% efficiency.Discussion and Conclusion: This results showed that that both of two Pseudomonas and Actinomycetes bacteria a good candidates for eliminating of diazinon from aqueous solution. Pseudomonas has higher efficiency in absorption of diazinon. According to the conditions used, they can reduce the level of diazinon to an optimum level in the aquatic solutions