Removal of dimethoate from contaminated water using corncob and rice husk as low-cost materials

This research aims to evaluate the potential removal efficiency of dimethoate from aqueous solutions utilizing activated carbon (AC) derived from corncob and rice husk. First, researchers identified the structural and morphological features of produced corncob activated carbon (KOHCC) and rice husk activated carbon (KOHRH). To examine proximate analyses and characterize changes on the surfaces and structure of corncob following chemical activation with KOH, X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy were utilized. Second, the effects of sorbet dose, sorbet beginning concentration, and contact duration on its usage were explored. Various sorption properties were investigated and compared to commercial activated carbon generated from bituminous coal. According to the findings, batch adsorption was carried out using dimethoate solutions ranging from 10 to 150 mg/L. The maximum removal percentage of dimethoate by KOHRH was 93.1% for 10 ppb and 93.9% for 100 ppb at 0.5 mg/100 mL. In contrast, the most significant removal effectiveness of dimethoate by KOHCC was 88.7% for 10 ppb at 0.4 mg/100 mL respectively. Therefore, dimethoate may be removed from water using KOHCC and KOHRH.