Adsorption of pyridine from aqueous solutions onto polyaluminium chloride and anionic polyacrylamide water treatment residuals

Abstract The adsorption performance of pyridine onto polyaluminium chloride (PAC) and anionic polyacrylamide (APAM) water treatment residuals (WTRs) was investigated by batch experiments. This study confirmed the assumption that PAC–APAM WTRs had ability to remove pyridine. non-linear Dubinin–Radushkevich model Freundlich better described isotherms, indicating a chemically controlled multilayer process. rate simultaneously external film diffusion intraparticle diffusion. an endothermic reaction with randomness increase. decreased pH Pyridine removal observed be linear increase from 6.16% 96.18%, dosage 2.5 g/L 15 g/L. Langmuir maximum capacity 3.605 mg/g while theoretical isotherm saturation 9.823 mg/g. Therefore, recycled into contaminated soils for remediation is expected innovative alternative disposal method. More research recommended in future identify detailed mechanisms most appropriate mixing ratio under various climatic conditions.