Effective removal of fluoride from wastewater by magnesium oxide-loaded aeolian sand with high loading ratio

Chenxin Ding; Zhen Jin; Qianxi Li; Shuhao Zhou; Yuru Sun

doi:10.1016/j.cjche.2025.05.030

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Effective removal of fluoride from wastewater by magnesium oxide-loaded aeolian sand with high loading ratio

Updated：2026-02-12

- Effective removal of fluoride from wastewater by magnesium oxide-loaded aeolian sand with high loading ratio
- Effective removal of fluoride from wastewater by magnesium oxide-loaded aeolian sand with high loading ratio
- 中国化学工程学报（英文版） 2025年87卷第11期页码：369-380
- Affiliations：
  
  1. School of Materials and Chemical Engineering, Anhui Jianzhu University,Hefei,China,230601
  2. Anhui Advanced Building Materials Engineering Laboratory, Anhui Jianzhu University,Hefei,China,230601
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2025.05.030
  中图分类号：
- 纸质出版：2025
- Accepted：
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Chenxin Ding, Zhen Jin, Qianxi Li, 等. Effective removal of fluoride from wastewater by magnesium oxide-loaded aeolian sand with high loading ratio[J]. 中国化学工程学报（英文版）, 2025,87(11):369-380.

Chenxin Ding, Zhen Jin, Qianxi Li, Shuhao Zhou, Yuru Sun. Effective removal of fluoride from wastewater by magnesium oxide-loaded aeolian sand with high loading ratio[J]. Chinese Journal of Chemical Engineering, 2025, 87(11): 369-380.
Chenxin Ding, Zhen Jin, Qianxi Li, 等. Effective removal of fluoride from wastewater by magnesium oxide-loaded aeolian sand with high loading ratio[J]. 中国化学工程学报（英文版）, 2025,87(11):369-380. DOI： 10.1016/j.cjche.2025.05.030.

Chenxin Ding, Zhen Jin, Qianxi Li, Shuhao Zhou, Yuru Sun. Effective removal of fluoride from wastewater by magnesium oxide-loaded aeolian sand with high loading ratio[J]. Chinese Journal of Chemical Engineering, 2025, 87(11): 369-380. DOI： 10.1016/j.cjche.2025.05.030.

摘要

Abstract

In this study

a facile and effective hydrothermal approach was developed to synthesize magnesium oxide loaded aeolian sand (MOAS) with a high loading ratio as an environmentally friendly adsorbent for effective removal of fluoride from wastewater. The analysis of material morphology and structure revealed that the MOAS has a stacked structure and the magnesium oxide is successfully loaded on the surface of aeolian sand with high loading ratio (230%). The adsorption kinetics demonstrated that the adsorption of fluoride by MOAS followed the pseudo-second-order model. The adsorption isotherm conformed to the Redlich-Peterson model with a saturated adsorption capacity of 153.11 mg·g

-1

. MOAS exhibited excellent defluorination performance over a wide pH range and in the presence of competitive anion

respectively. The density functional theory (DFT) theoretical calculations verify that the MOAS has strong affinity for fluoride. The adsorption mechanism was investigated through FTIR and XPS

revealing that hydroxyl exchange and coordination on the surface were responsible for the defluorination of MOAS. Finally

desorption

regeneration

adsorption column experiments and actual wastewater experiment further confirmed the practical potential of MOAS for defluorination applications.

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