Optimisation of Activated Carbon Preparation by Chemical Activation of Ayous Sawdust, Cucurbitaceae Peelings and Hen Egg Shells Using Response Surface Methodology

Production of Polymeric Membranes Based on Activated Carbons for Wastewater Treatment

“…Conversely, the band at 1021 cm −1 corresponds to the stretching vibration of the C-O group in alcohols, phenols, ethers, or esters [34]. The surface acidity and basicity analysis play a crucial role in interpreting the surface chemistry of adsorbed materials [35].…”

“…The polymeric AC-CO2 membrane (0.0076 mol/L) and the AC-CO2 (0.01245 mol/L) exhibited surface alkalinity. This characteristic is ascribed to groups comprising oxygen on the material's surface, such as carboxylic acids, phenols, and lactones [35]. It is also associated with a high content of electron-rich sites and a low concentration of elec-tronwithdrawing groups in the basal plane.…”

“…The pHPZC for AC-CO2 was determined to be 10.5, and considering the results obtained from the FTIR analysis, where the presence of alcohols, phenols, ethers, and other compounds with basic characteristics was identified (band at 1021 cm −1 ), the assigned value of pHPZC is expected, given that this component has basic characteristics [35,38]. Figure 4 illustrates a pH PZC of 6.58 for the AC-CO 2 membrane, denoting the pH at which the net surface charge nullifies.…”