Polypropylene fiber grafted calcium alginate with mesoporous silica for adsorption of Bisphenol A and Pb2

Lijing Xu; Tian Bai; Xinzhun Yi; Kongyin Zhao; Wenxiong Shi; Fengying Dai; Junfu Wei; Jie Wang; Ce Shi

doi:10.1016/j.ijbiomac.2023.124131

Polypropylene fiber grafted calcium alginate with mesoporous silica for adsorption of Bisphenol A and Pb²

Int J Biol Macromol. 2023 May 31:238:124131. doi: 10.1016/j.ijbiomac.2023.124131. Epub 2023 Mar 22.

Authors

Lijing Xu¹, Tian Bai¹, Xinzhun Yi², Kongyin Zhao³, Wenxiong Shi⁴, Fengying Dai⁵, Junfu Wei⁵, Jie Wang⁵, Ce Shi⁶

Affiliations

¹ State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, China; School of Material Science and Engineering, Tiangong University, Tianjin 300387, China.
² School of Material Science and Engineering, Tiangong University, Tianjin 300387, China.
³ State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, China; School of Material Science and Engineering, Tiangong University, Tianjin 300387, China. Electronic address: zhaokongyin@tiangong.edu.cn.
⁴ Institute for New Energy Materials and Low-Carbon Technologies, Tianjin University of Technology, Tianjin, 300387, China.
⁵ State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, China.
⁶ State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 300387, China.

PMID: 36958444
DOI: 10.1016/j.ijbiomac.2023.124131

Abstract

Polypropylene grafted calcium alginate with mesoporous silica (PP-g-CaAlg@SiO₂) for adsorbing Bisphenol A (BPA) and Pb²⁺ was prepared by calcium chloride (CaCl₂) crosslinking and hydrochloric acid solution treatment. The PP-g-CaAlg@SiO₂ was characterized by SEM, TEM, BET, XRD, FTIR and TG. PP-g-CaAlg@SiO₂ exhibited excellent adsorption capacity for BPA and Pb²⁺, because the formation of reticulated nanorod structure increased its specific surface area. Subsequently, the adsorption behaviours of BPA and Pb²⁺, including adsorption isotherms and adsorption kinetics, were investigated. Afterward, isothermal titration calorimetry (ITC) and molecular dynamics (MD) simulation were performed to explore the adsorption mechanism. The results indicated that hydrogen bonding played the leading role in the adsorption of BPA, while the bonding of Pb²⁺ to carboxyl group binding sites was the focus of Pb²⁺ adsorption. In addition, the adsorption capacity of PP-g-CaAlg@SiO₂ was stable over 10 cycles.

Keywords: Adsorption mechanism; Bisphenol A and Pb(2+) adsorption; Calcium alginate; Mesoporous SiO(2); Nanorod structure.

MeSH terms

Adsorption
Alginates / chemistry
Hydrogen-Ion Concentration
Kinetics
Lead
Polypropylenes / chemistry
Silicon Dioxide* / chemistry
Water Pollutants, Chemical* / analysis

Substances

Silicon Dioxide
bisphenol A
Polypropylenes
Lead
Alginates
Water Pollutants, Chemical