Using Modified Chestnut-Nano Shell for Removal of Diclofenac from Aqueous Solution

Abstract

In this study, the adsorption of an anti-inflammatory drug diclofenac (Dc) by modified chestnut peels. Chestnut peels (CP), acid chestnut peels carbonized (ACSPC), and chestnut peels carbonized impregnation by ferric and nickel (II) oxide (NiFe₂O₄-CPC) nanocomposite, investigated to remove Dc from an aqueous solution. Batch experiments were conducted for adsorption capacity for Dc from an aqueous solution using the modified chestnut peels. The modified chestnut peels and morphological changes after adsorption were characterization by the following techniques: FTIR, XRD, SEM, and EDX respectively. The kinetic model; pseudo-second-order and isothermal model; Langmuir demonstrated the adsorption processes on adsorbents.  The K₂, q_e, and R² values were in the range (0.303 to 1.20) gµg^-1min^-1, (0.039 to 0.160) mgg^-1, and (0.712-0.972) respectively, at three different temperatures 298, 308, and 318 K.  While for Langmuir isotherm the value of K_L, C_m, and R² in the range (0.014–0.024) L mg⁻¹, (14.286-16.667) mg g⁻¹, and (0.737-0.982) respectively for Dc on the adsorbents. The thermodynamic parameters revealed that the spontaneous and exothermic Dc adsorption process on the modified chestnut peels and the nanocomposite, also having good adsorption efficiency for removing pharmaceutical pollution from aqueous solutions could be used for water treatments.