Insecticides have been recognized as the most important water pollutants. Nowadays, diazinon (DIZ) is an organophosphate pesticide that is widely used in agriculture as a pesticide. However, DIZ residues have been found in the aquatic ecosystems of Iran. In this study, the removal efficiency of the prepared adsorbents (from rice husk) was investigated upon the DIZ residues from water. To achieve the carbonized product, rice husk was mixed with polytetrafluoroethylene (PTFE) at a 1:2 weight ratio; then, it was then placed in a furnace based on the temperature–time schedule. The influence of the following parameters was investigated on the performance of carbonized rice husk: pH, contact time, adsorbent amount, and pesticide concentration. The measured DIZ concentrations were detected by high-performance liquid chromatography (HPLC). The results of this study showed that the optimum conditions for DIZ removal were achieved at pH = 9, the contact time of 40 min, and the adsorbent dosage of 0.1 gL⁻¹. Therefore, the maximum removal percentage of the insecticide and the adsorption process at 10 ppm were more consistent with the Langmuir isotherm (R² > 0.99). This study has resulted that the prepared adsorbent from rice husk can be used as an efficient adsorbent to remove DIZ from aqueous media.

杀虫剂已被公认为最重要的水污染物。如今，二嗪农（DIZ）是一种有机磷农药，广泛用作农业杀虫剂。然而，在伊朗的水生生态系统中发现了 DIZ 残留物。在这项研究中，研究了制备的吸附剂（来自稻壳）对水中 DIZ 残留物的去除效率。为了获得碳化产品，稻壳与聚四氟乙烯 (PTFE) 以 1:2 的重量比混合；然后，根据温度-时间安排将其放入炉中。考察了以下参数对炭化稻壳性能的影响：pH值、接触时间、吸附剂用量和农药浓度。通过高效液相色谱法 (HPLC) 检测测量的 DIZ 浓度。^-1。因此，10 ppm时杀虫剂的最大去除率和吸附过程更符合Langmuir等温线（R ²  > 0.99）。该研究表明，从稻壳中制备的吸附剂可用作从水性介质中去除 DIZ 的有效吸附剂。