Feng, W.; Cui, H.; Zhu, H.; Shutes, B.; Yan, B.; Hou, S.

Layered double hydroxides, an effective nanomaterial to remove phosphorus from wastewater: Performance, mechanism, factors and reusability

Article

Feng, W., Cui, H., Zhu, H., Shutes, B., Yan, B. and Hou, S. 2023. Layered double hydroxides, an effective nanomaterial to remove phosphorus from wastewater: Performance, mechanism, factors and reusability. Science of the Total Environment. 884. https://doi.org/10.1016/j.scitotenv.2023.163757

Publication dates
Type	Article
Title	Layered double hydroxides, an effective nanomaterial to remove phosphorus from wastewater: Performance, mechanism, factors and reusability
Authors	Feng, W., Cui, H., Zhu, H., Shutes, B., Yan, B. and Hou, S.
Abstract	Systematic understanding of phosphorus adsorption performance, mechanism, factors and reusability of layered double hydroxides (LDH) remains limited. Thus, iron (Fe), calcium (Ca) and magnesium (Mg)-based LDH (FeCa-LDH and FeMg-LDH), were synthesized with a co-precipitation method to improve phosphorus removal efficiency during the wastewater treatment process. Both FeCa-LDH and FeMg-LDH showed a considerable ability to remove phosphorus in wastewater. When the phosphorus concentration was 10 mg/L, the removal efficiency reached 99 % (FeCa-LDH: 1 min) and 82 % (FeMg-LDH: 10 min), respectively. The phosphorus removal mechanism was observed to be electrostatic adsorption, coordination reaction and anionic exchange, which was more evident at pH = 10 for FeCa-LDH. Co-occurrence anions that affected phosphorus removal efficiency, were observed in the following order: HCO > CO ≈ NO > SO . After five adsorption-desorption cycles, phosphorus removal efficiency was still up to 85 % (FeCa-LDH) and 42 % (FeMg-LDH), respectively. Together, the present findings suggest that LDHs were high-performance, strongly-stable and reusable phosphorus adsorbents.
Keywords	FeMg-LDH, Wastewater, Nanomaterials, Phosphorus, FeCa-LDH
Sustainable Development Goals	6 Clean water and sanitation
Middlesex University Theme	Sustainability
Publisher	Elsevier
Journal	Science of the Total Environment
ISSN	0048-9697
Online	02 May 2023
Print	01 Aug 2023
Publication process dates
Deposited	25 May 2023
Submitted	24 Feb 2023
Accepted	23 Apr 2023
Output status	Published
Digital Object Identifier (DOI)	https://doi.org/10.1016/j.scitotenv.2023.163757
Language	English

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