Electrospun polyacrylonitrile/hydroxyapatite composite nanofibrous membranes for the removal of lead ions from aqueous solutions. (23rd May 2022)

• Record Type: Journal Article
• Authors: Feng, Tao; Fan, Zhixuan; Wu, Si; Chen, Lei; Tian, Zishun
• Is Part Of: New journal of chemistry. Volume 46:Number 22(2022)
• Page Start: 10957
• Page End: 10966
• Publication Date: 2022-05-23
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj00809b
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Renewable electrospun PAN/HAP membranes with a nanofiber–nanoparticle structure were fabricated for the efficient removal of lead ions from aqueous solutions. Abstract : Novel polyacrylonitrile/hydroxyapatite (PAN/HAP) composite nanofibrous membranes were successfully prepared via electrospinning. Scanning electron microscopy, Fourier-transform infrared spectroscopy, and X-ray diffractometry were used to characterize the PAN/HAP nanofibrous membranes. The highest adsorption capacity of 111.92 mg g −1 was reached at an adsorbent dosage of 1 g L −1, with an original lead ion concentration of 400 mg L −1, and after a duration time of 300 min. Pseudo-second-order kinetics and Langmuir isotherm models were applicable to represent the adsorption process and reveal the mechanism of the membranes, with monolayer adsorption being identified. In regeneration experiments, 82.26% of the accumulation capacity was retained after five adsorption–desorption cycles. Therefore, the PAN/HAP nanofibrous membranes can be used as excellent and reusable adsorbents for Pb 2+ removal.