The adsorption of phosphate was conducted by the complex of chitosan/polyacrylamide/ferric(CS/PAM/Fe(Ⅲ))prepared.The SEM images and XPS spectra confirmed the successful adsorption of phosphate.The adsorption process ...The adsorption of phosphate was conducted by the complex of chitosan/polyacrylamide/ferric(CS/PAM/Fe(Ⅲ))prepared.The SEM images and XPS spectra confirmed the successful adsorption of phosphate.The adsorption process was studied by varying the influencing aspects like pH,co-existing ions,contact time,and initial phosphate concentration.The experimental results indicate that the adsorptive capacity decreases with the increase of pH.However,it is commendable that there is still a adsorption capacity of more than 5 mg/g when the pH is 8-11.The adsorption kinetics can be accurately described by the pseudo-second-order model and is controlled by both chemisorption and surface diffusion.The adsorption process is a single layer adsorption.This paper proposed that the adsorption mechanism of CS/PAM/Fe(Ⅲ)complex is the joint action of electrostatic attraction and ligand exchange.展开更多
基金Funded by the Provincial Natural Science Foundation for Universities of AnhuiChina(No.KJ2021A0624)+1 种基金the Director's Fund of Anhui Province Advanced Building Materials International Research Center(No.JZCL2207ZR)the Anhui Jianzhu University Talent Introduction and Doctoral Start-up Fund(No.2023QDZ23)。
文摘The adsorption of phosphate was conducted by the complex of chitosan/polyacrylamide/ferric(CS/PAM/Fe(Ⅲ))prepared.The SEM images and XPS spectra confirmed the successful adsorption of phosphate.The adsorption process was studied by varying the influencing aspects like pH,co-existing ions,contact time,and initial phosphate concentration.The experimental results indicate that the adsorptive capacity decreases with the increase of pH.However,it is commendable that there is still a adsorption capacity of more than 5 mg/g when the pH is 8-11.The adsorption kinetics can be accurately described by the pseudo-second-order model and is controlled by both chemisorption and surface diffusion.The adsorption process is a single layer adsorption.This paper proposed that the adsorption mechanism of CS/PAM/Fe(Ⅲ)complex is the joint action of electrostatic attraction and ligand exchange.
