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Phosphate removal and recovery by lanthanum-based adsorbents: A review for current advances

He, Qinqin and Zhao, Hongjun and Teng, Zedong and Wang, Yin and Li, Min and Hoffmann, Michael R. (2022) Phosphate removal and recovery by lanthanum-based adsorbents: A review for current advances. Chemosphere, 303 . Art. No. 134987. ISSN 0045-6535. doi:10.1016/j.chemosphere.2022.134987.

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Controlling eutrophication and recovering phosphate from water bodies are hot issues in the 21st century. Adsorption is considered to be the best method for phosphate removal because of its high adsorption efficiency and fast removal rate. Among the many adsorbents, lanthanum (La)-based adsorbents have been paid more and more attention due to their strong affinity to phosphorus. This paper reviews research of phosphate adsorption on La-based adsorbents in different La forms, including lanthanum oxide/hydroxide, lanthanum mixed metal oxide/hydroxide, lanthanum carbonate, La³⁺, La-based metal-organic framework (La-MOF) and La-MOF derivatives. The La-based adsorbents can be loaded on many carriers, such as carbon material, clay minerals, porous silica, polymers, industrial wastes, and others. We find that lanthanum oxide/hydroxide and La³⁺ adsorbents are mostly studied, while those in the forms of lanthanum carbonate, La-MOF, and La-MOF derivatives are relatively few. The kinetic process of most phosphate adsorption is pseudo-second-order and the isotherm process is in accordance with the Langmuir model. The cost of La-based and other traditional adsorbents was compared. The adsorption mechanisms are categorized as electrostatic attraction, ligand exchange, Lewis acid-base interaction, ion exchange and surface precipitation. Besides, regeneration methods of La-based adsorbents are mainly acid, alkali, and salt-alkali. In addition, the La-based adsorbents after absorbing phosphate can be directly used as a slow-release fertilizer. This review provides a basis for the research on phosphate adsorption by La-based adsorbents. It should be carried out to further develop La-based materials with high adsorption capacity and good regeneration ability. Meanwhile, studies have been conducted on the reuse of phosphate after desorption, which needs more attention in future research.

Item Type:Article
Related URLs:
URLURL TypeDescription Data
Wang, Yin0000-0001-6723-7975
Hoffmann, Michael R.0000-0001-6495-1946
Additional Information:© 2022 Elsevier. Received 18 February 2022, Revised 25 April 2022, Accepted 13 May 2022, Available online 18 May 2022. This work was supported by the National Natural Science Foundation of China (No. 52070016 and No. 51279004). Author contribution: Qinqin He: Writing-original draft, Conceptualization, Methodology. Hongjun Zhao: Data curation, Writing-review & editing. Zedong Teng: Data curation, Writing-review & editing. Yin Wang: Data curation, Writing-review & editing. Min Li: Supervision. Michael R. Hoffmann: Supervision. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Funding AgencyGrant Number
National Natural Science Foundation of China52070016
National Natural Science Foundation of China51279004
Subject Keywords:Phosphate; Adsorption; Recovery; Wastewater; Lanthanum-based adsorbents
Record Number:CaltechAUTHORS:20220519-375210000
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Official Citation:Qinqin He, Hongjun Zhao, Zedong Teng, Yin Wang, Min Li, Michael R. Hoffmann, Phosphate removal and recovery by lanthanum-based adsorbents: A review for current advances, Chemosphere, Volume 303, Part 1, 2022, 134987, ISSN 0045-6535,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:114815
Deposited By: George Porter
Deposited On:19 May 2022 21:09
Last Modified:07 Jun 2022 17:07

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