University Of Tehran Press Pollution 2383-451X 8 1 2022 01 01 Evaluation of Efficiency of Iron Oxide Nanoparticles (Fe3O4@CNT) in Removal of Malathion in Aqueous Medium Using Response Surface Methodology (RSM) 281 293 85026 10.22059/poll.2021.323942.1090 EN Malektaj Eskandarimakvand Department of Environment, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran. Sima Sabzalipour Department of Environment, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran. Mahboobeh Cheraghi Department of Environment, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran. Neda Orak Department of Environment, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran. Journal Article 2021 05 16 Organophosphates are one of the most common pesticides in the world. Among them, one can find malathion that is classified as carcinogenesis, and, as a result, should be appropriately removed since it is highly consumed and possesses a lot of pathogenicity. So far, several processes have been used to remove malathion from aqueous media. The present study investigates its removal by means of Fe₃O₄ iron oxide nanoparticles. Based on experimental-laboratory studies, using the Response Surface Methodology (RSM), the impact of independent variables such as pH, iron oxide nanoparticle concentration, and contact time on malathion removal efficiency have been investigated. Results show that the pH of the solution is the most important and effective parameter in the process. Optimal conditions of malathion removal based on the appropriate model, obtained from RSM, include 0.4 g/L iron oxide nanoparticles, pH of about 5 (acidic conditions), and contact time of about 1 h with ultraviolet radiation being equal to 82% malathion removal. The process, used in this study, can remove malathion from aqueous solutions according to the so-called conditions, and changing the laboratory conditions can effectively remove it. This process can also be recommended as an economic and scientific method to remove malathion from drinking water. https://jpoll.ut.ac.ir/article_85026_9b8656e0339e05ea5d852030aa715298.pdf