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Phosphate removal performance and mechanism of zirconium-doped magnetic gasification slag
Phosphate removal performance and mechanism of zirconium-doped magnetic gasification slag
- Source :
- Arabian Journal of Chemistry, Vol 18, Iss 1, Pp 106079- (2025)
- Publication Year :
- 2025
- Publisher :
- Elsevier, 2025.
-
Abstract
- Zirconium-modified materials exhibit good adsorption performance, but their large-scale application is limited by the cost of carrier materials and the difficulty of solid–liquid separation of powder adsorbents. Therefore, in this study, we used low-cost gasification slag for zirconium oxide loading to avoid the aforementioned problems and successfully prepared a novel gasification slag–based zirconium-doped magnetic adsorbent material (GS-Z2M). GS-Z2M is a mesoporous adsorbent material with a large specific surface area (188 m2/g); it completely adsorbed phosphate with an initial concentration of 10 mg/L within 3 h. The rate-controlling step of phosphate removal using GS-Z2M was chemisorption. The Langmuir model proved more suitable for describing the adsorption of phosphate on GS-Z2M than the Freundlich and Temkin models, and the maximum phosphate adsorption capacity calculated using the Langmuir model was 26.02 mg/g. GS-Z2M showed good phosphate adsorption selectivity and reusability (can be recycled at least 5 times). GS-Z2M also showed good capacity for treating actual phosphate wastewater under dynamic flow conditions. The mechanism of phosphate adsorption on GS-Z2M mainly involved ligand exchange and inner-sphere complexation. The obtained results suggest that GS-Z2M is a promising adsorbent and vital for the development of phosphate adsorbents and recycling of gasification slag.
- Subjects :
- Phosphorous
Zr
Solid waste
Adsorption
Wastewater
Chemistry
QD1-999
Subjects
Details
- Language :
- English
- ISSN :
- 18785352
- Volume :
- 18
- Issue :
- 1
- Database :
- Directory of Open Access Journals
- Journal :
- Arabian Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.5755f67e3add43feb30cd26400644ff9
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.arabjc.2024.106079