Fabrication of hypercrosslinked hydroxyl-rich solid phase extractants for cesium separation from the salt lake brine
[Display omitted] •New hypercrosslinked hydroxyl-rich polymers HCP-P and HCP-R were facilely prepared.•HCPs exhibited high Cs+ adsorption capacities and fast adsorption kinetic.•HCPs could selectively adsorb and separate Cs+ in the presence of high concentrations of K+.•HCPs demonstrated excellent r...
Gespeichert in:
Veröffentlicht in: | Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2020-11, Vol.400, p.125991, Article 125991 |
---|---|
Hauptverfasser: | , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | [Display omitted]
•New hypercrosslinked hydroxyl-rich polymers HCP-P and HCP-R were facilely prepared.•HCPs exhibited high Cs+ adsorption capacities and fast adsorption kinetic.•HCPs could selectively adsorb and separate Cs+ in the presence of high concentrations of K+.•HCPs demonstrated excellent recycle performance (5 cycles).•The Cs+ adsorption mechanism of HCPs was ion-exchange between Cs+ and O−Na+.
In this work, two hypercrosslinked hydroxyl-rich polymers (HCP-P and HCP-R) were facilely prepared through a one-pot Friedel-Crafts polymerization of phenol, resorcinol and formaldehyde dimethyl acetal, respectively. HCP-P and HCP-R were investigated for their ability to separate Cs+ from the salt lake brine via ion-exchange reaction between Cs+ and O−Na+. The Cs+ adsorption isotherms of HCP-P and HCP-R follow the Langmuir model, and their adsorption capacities reach 249.64 mg g−1 and 259.97 mg g−1, surpassing most of commercial materials like AMP-PAN (81 mg g−1) and TAM-5 (191.8 mg g−1). The Cs+/K+ separation factors (S.F.) of HCPs can reach 12.4 even in the presence of high concentrations of K+ (C(K+)/C(Cs+) = 712.5). Notably, HCPs could retain more than 90% of the adsorption capacities after 5 successive adsorption-desorption cycles. Besides, X-ray photoelectron spectroscopy (XPS), FT-IR spectra and TEM-EDS analysis revealed the ion exchange mechanism of the Cs+ adsorption process. This work demonstrated the excellent application potential of hypercrosslinked hydroxyl-rich polymer adsorbents in separating Cs+ from the salt lake brine. |
---|---|
ISSN: | 1385-8947 1873-3212 |
DOI: | 10.1016/j.cej.2020.125991 |