عنوان مقاله [English]
Organophosphate pesticides are widely used today to increase the yield and efficiency of agricultural products and to control diseases transmitted by disease-carrying arthropods. These toxins enter water sources extensively through agricultural wastewater and cause irreparable damage to water resources. The aim of the present study was to purify the chlorpyriphos organophosphate pesticide from the Aquatic environment using adsorbents of carbon nanoparticles in the bioDrOF system. Among the many reasons that make activated carbon potential adsorbent for the removal of contaminants from the aquatic environment, can point to the large microscopic structure, the large surface erea and chemical nature, the adsorption efficiency of organic pollutants in the environment also depends on activated carbon microspores. Sampling was performed over a period of twelve days. The factors evaluated in this study were to determine the reduction of toxins in the water, including the amount of pesticide concentration in the water, light absorption and water ph. Nanocarbon adsorbent was instslled at the entrance of the Bit Trap Filter equipped with bioDrOf. The adsorption of light was measured by spectrophotometry. The standard pesticide curve used in this experiment was plotted using different concentration and then measured through this pesticide in each sample. A digital pH meter was used to measure the pH of the water. With an initial concentration of 60 mg per one pesticide, the pesticide concentration at the end of the experiment decreased to 2.07 ± 0.075 and its reduction efficiency was estimated to be 96.55%. The amount of light absorption at the end of the experiment decreased to 0.008 ± 0.005, which was estimated to reduce 96.32%. There was an increasing trend of water pH and at the end of the period it reached 8.25. Significant differences were found between changes in pesticide concentration and also between changes in light absorption from the beginning to the end of the experiment (P˂0.05). It can be concluded based on the present study that activated carbon had a good performance to create alkaline conditions and remove pesticides at the concentration used by chloriprifos in this study (60 mg/l). Therefore, due to the effectiveness and low cost of this method for the treatment of organophophate Pesticide Chloriprifus and similar compounds is recommended.