ADSORPTION OF A NON-STEROIDAL ANTI-INFLAMMATORY DRUG ONTO MgAl/LDH-ACTIVATED CARBON COMPOSITE - EXPERIMENTAL INVESTIGATION AND STATISTICAL PHYSICS MODELING

Publication date: Available online 11 November 2019Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Pollyanna Vanessa Santos Lins, Daniely Carlos Henrique, Alessandra Honjo Ide, José Leandro da Silva Duarte, Guilherme Luiz Dotto, Amira Yazidi, Lotfi Sellaoui, Alessandro Erto, Carmem Lucia de Paiva e Silva Zanta, Lucas MeiliAbstractA Layered Double Hydroxides (LDH) with Mg and Al composite (MgAl/LDH-biochar) was synthesised by the co-precipitation method, using bovine bone activated carbon as support structure for the LDH particles. The adsorbent was applied for diclofenac sodium (DS) removal from synthetic water. Batch experiments provided a DS removal of almost 80% under optimized conditions. The performances of the MgAl/LDH-biochar composite (i.e. adsorption capacity as much as 5.96 mg/g) result significantly better when compared to the raw biochar (2.35 mg/g) at first 15 minutes. Despites the equilibrium data provided good adjustments for all tested models, Redlich-Peterson model showed the highest values of R2 and lower values of average relative error (ARE) and Akaike’s information criterion (AIC). The kinetic data of DS adsorption was best represented by the pseudo-second order model. The regenerability of MgAl/LDH-biochar was also evaluated through six adsorption/desorption cycles using either methanol or sodium chloride (0.5 mol/L) as desorbing agents, showing that the material can be reused until the third cycle maintainin...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Category: Chemistry Source Type: research