Abstract—A system for removing organophosphate insecticides was designed using modified bentonite and a fine micro-nanobubble generator. The native bentonite was modified with berberine chloride and MgO to form a berberine chloride/MgO composite powder, which was then used to fabricate ceramic porous balls approximately 2.0 cm in diameter and weighed around 7.2 g, with a permeability of approximately 1.5 × 10⁶ mD. Micro-nanobubbles were generated with mean and mode sizes of 193.9 ± 13.7 nm and 107.7 ± 2.3 nm, respectively. The density of micro-nanobubbles was approximately 7 × 10⁸/mL ± 1 × 10⁷. To evaluate the system's effectiveness, tap water was spiked with 5 ppm of each organophosphate insecticide: methyl parathion, chlorpyrifos, profenofos, and dimethoate. The contaminated water was then passed through a filter composed of the modified bentonite ceramic balls. The concentration of each insecticide in the water tank was analyzed over time at 6, 12, 18, and 24-hour intervals using high-performance liquid chromatography. The results revealed a linear decrease in insecticide concentrations over time whereas chlorpyrifos was reduced at 15%, 32%, 40%, and 42%, methyl parathion was at 10%, 25%, 30%, and 38%, profenofos was at 18%, 35%, 40%, and 45% and dimethoate was at 8%, 20%, 30%, and 30% after 6, 12, 18, and 24 hours, respectively. The hybrid system demonstrated an ability to absorb organophosphate insecticides, suggesting its potential application for reducing insecticide residues in contaminated water zones, particularly in agricultural areas.

Keywords—organophosphate insecticide, modified bentonite, micro nanobubbles water, degradation, ceramic ball, run-off water

Cite: Kanchana Dumri, Dau Hung Anh, and Chinanat Witthayaprapakorn, "Removal of Organophosphate Insecticides in Runoff Water Model Consists of Fine Micro Bubble Water Generator and Absorptive Organobentonite Ceramic Composites Balls," International Journal of Environmental Science and Development vol. 16, no. 2, pp. 119-124, 2025.

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