Pesticides are used to control a wide range of crops and pests around the world. Among the widely used pesticides dicofol is mildly poisonous to humans and very toxic to aquatic creatures. As a result, it must be removed from ground water sources. Magnesium oxide nanoparticles (MgONP) were synthesised and used to produce a MgO/Chitosan nanocomposite (MgO/Cs NC) that was used to remove dicofol from aqueous solutions using adsorption process. SEM and FTIR were used to examine the synthesised MgO/Cs NC. A Box Behnken experimental design based on response surface methodology (RSM) was used to explore the effect of experimental variables such as agitation time, pH, MgO/Cs dose, dicofol initial concentration, and temperature on percentage dicofol removal. SEM pictures of the MgO/Cs NC synthesis show that the MgO in the composite has retained its nano size. FTIR spectra showed the possible functional groups present in the synthesized MgO/Cs NC. pH (5 – 7), MgO/Cs NC dose (0.18 – 0.22 g/L), starting dicofol concentration (10 – 30 mg/L), and temperature were all assessed after 50 minutes of agitation at (318 – 328 K). The optimum dicofol removal was 85.54% at pH 6.4, dose 0.185 g/L, initial concentration 24 mg/L, and temperature 326.5 K, according to design expert version 13.0. The results suggested that the synthesized MgO/Cs NC can be applied as a promising adsorbent for the removal of dicofol from aqueous solutions.

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