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Facile fabrication of La/Ca bimetal-organic frameworks for economical and efficient remove phosphorus from water.
- Source :
-
Journal of Molecular Liquids . Jun2022, Vol. 356, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
-
Abstract
- [Display omitted] • The use of La/Ca-BDC-1 can reduce the cost of phosphorus removal by about 40%. • La/Ca-BDC-1 can efficiently remove phosphorus from natural water. • The phosphorus removal mechanism of La/Ca-BDC-1 was studied. In this study, low-cost and water-stable La/Ca bimetallic organic framework (La/Ca-BDC) are synthesized and used for the efficient removal of phosphorus in water. The study of adsorption isotherms shows that the high concentration of Ca in La/Ca-BDC-1 (prepared with Ca molar fraction in the precursor as high as 50%) has little interference to the phosphorous adsorption capacity (66.0 mg g−1) compared with that of the La-BDC (71.0 mg g−1), or only 7.0% drop, but it translates to significantly reduced cost of phosphorus removal by about 40.0%. The kinetic study of phosphorus removal process using the synthesized La/Ca-BDC-n conforms to the pseudo-second-order kinetic model. In addition, the synthesized La/Ca-BDC-1 is suitable for phosphorus removal in wide pH water (3.0–9.0). More importantly, the manufactured La/Ca-BDC-1 can efficiently remove the phosphorus in the actual water. In addition, even if there are interfering ions (Ca2+, Mg2+, CO 3 2–, HCO 3 –, SO 4 2- and Cl-) with concentration of five times of the phosphorus, the phosphorus removal efficiency of La/Ca-BDC-1is hardly affected. Interestingly, the removal efficiency of La/Ca-BDC-1 for phosphorus is still higher than 70% after five cycles. From the FT-IR and XPS analysis, it is shown that ligand exchange and complexation are the main phosphorus removal mechanisms of La/Ca-BDC-1. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01677322
- Volume :
- 356
- Database :
- Academic Search Index
- Journal :
- Journal of Molecular Liquids
- Publication Type :
- Academic Journal
- Accession number :
- 156518892
- Full Text :
- https://doi.org/10.1016/j.molliq.2022.119024