Chitosan/diatomite composite (CH/D) was synthesized at potential multifunctional adsorbent of enhanced uptake capacities for different species of organic water pollutants. The synthetic CH/D composite was characterized and applied in batch adsorption studies for pefloxacin (PF) as pharmaceutical residual and chlorpyrifos (CF) as pesticide residual from water. The CH/D composite is of enhanced uptake capacities for both PF (310.7 mg/g) and CF (392.2 mg/g) as compared to diatomite and chitosan and single components. The PF and CF uptake reactions follow the Langmuir model as an equilibrium model which demonstrates their adsorption in monolayer and homogenous form. The PF uptake process is of Pseudo-First order kinetic while the CF uptake process is of Pseudo-Second order kinetics. The Gaussian energies (6.74 KJ/mol (PF) and 7.76 KJ/mol (CF)) and thermodynamic parameters suggest PF and CF adsorption reactions of physical, feasible, exothermic, and spontaneous properties. The CH/D composite exhibits strong selectivity for PF and CF molecules in the existence of PO₄³⁻, SO₄²⁻, and NO₃⁻ anions and considerable selectivity for them in the coexistence of Zn²⁺, Cd²⁺, and Pb²⁺ metal cations. The CH/D composite is of remarkable recyclability and reused in the removal of PF and CF for five cycles with removal percentages higher than 86% and 89%, respectively.

壳聚糖/硅藻土复合材料 (CH/D) 是在潜在的多功能吸附剂中合成的，对不同种类的有机水污染物具有增强的吸收能力。合成的 CH/D 复合物被表征并应用于对作为药物残留的培氟沙星 (PF) 和作为农药残留的毒死蜱 (CF) 的批量吸附研究。与硅藻土和壳聚糖以及单一组分相比，CH/D 复合材料对 PF (310.7 mg/g) 和 CF (392.2 mg/g) 的吸收能力均有所提高。PF 和 CF 吸收反应遵循 Langmuir 模型作为平衡模型，表明它们以单层和均质形式吸附。PF 吸收过程是伪一级动力学，而 CF 吸收过程是伪二级动力学。高斯能量 (6.74 KJ/mol (PF) 和 7. 76 KJ/mol (CF)) 和热力学参数表明 PF 和 CF 吸附反应具有物理、可行、放热和自发特性。CH/D 复合材料在 PO 存在下对 PF 和 CF 分子表现出很强的选择性₄ ^3-、SO ₄ ^2-和NO ₃ ^-阴离子以及在Zn ²⁺、Cd ²⁺和Pb ²⁺金属阳离子共存时对它们具有相当大的选择性。CH/D 复合材料具有显着的可回收性，可重复用于去除 PF 和 CF 五个循环，去除率分别高于 86% 和 89%。