多孔钙/铝填料调控酸性废水性能OA

Currently,the treatment of acidic wastewater faces challenges such as insufficient control accuracy and high costs,necessitating the development of efficient and low-cost treatment technologies.To address this need,an industrial solid waste resource utilization strategy was adopted,using quicklime as the raw material and coal gasification slag as a pore-forming agent,solid waste-based porous Ca/Al fillers were prepared via molding and sintering.The microstructure of the product was characterized by SEM,TGA,XRD and FTIR,providing a comprehensive evaluation of its structural properties.The acid wastewater neutralization and controlled-release performance of the fillers were investigated,with key parameters such as dosage,temperature,stirring speed and reaction time being examined.The results show that under the optimal reaction conditions of a dosage of 25 mg/L,reaction temperature at room temperature,stirring speed at 280 r/min and reaction time at 260 min,the pH of the acidic wastewater is balanced to 6-8,fully complying with the standard GB 8978-1996.Moreover,the pH buffering process of the solid waste-based porous Ca/Al fillers for acidic wastewater follows the first order reaction kinetic model.When the wastewater circulates through the simulated wetland device for 10 times,the pH stabilizes at 7.38,which meeting the discharge requirements.