ORIGINAL RESEARCH
Phosphorus Removal by Concrete-Based Layered
Double Hydroxides: Efficiency and Mechanism
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Center for Water Quality and Ecology, College of Civil and Architectural Engineering,
North China University of Science and Technology, Tangshan, 063000, China
Submission date: 2025-08-28
Final revision date: 2025-09-25
Acceptance date: 2025-11-08
Online publication date: 2026-05-22
Corresponding author
Xiao Liu
Center for Water Quality and Ecology, College of Civil and Architectural Engineering,
North China University of Science and Technology, Tangshan, 063000, China
KEYWORDS
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ABSTRACT
Phosphorus is a crucial contaminant in controlling water eutrophication. In this study,
concrete-based layered double hydroxides (C-LDH/C-LDO) were synthesized to remove phosphorus
from water. The main factors influencing phosphorus removal – such as initial pH, contact time,
and coexisting anions – were examined, and the removal mechanism was analyzed. Results indicated
that C-LDH and C-LDO performed better in acidic conditions, with C-LDO showing superior
phosphorus uptake, achieving a maximum adsorption of 164.01 mg/g at 20°C. CO32- competitively
inhibited phosphorus removal by C-LDH and C-LDO, while NO3-, Cl-, and SO42- had less impact.
The phosphorus removal mechanisms of C-LDH and C-LDO include electrostatic attraction, interlayer
anion exchange, complexation, and chemical precipitation. Overall, C-LDH and C-LDO offer
inexpensive and sustainable options for phosphorus removal.
CONFLICT OF INTEREST
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.
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