Water, Air, and Soil Pollution, volume 236, issue 2, publication number 137

Synthesis of Zeolite A–X from Coal Fly Ash via Ultrasonic-Alkali Fusion Hydrothermal Method for the Efficient Removal of Cr (VI) From Wastewater

Xiaohui Xu ¹

Kaige Chen ^{1, 2}

Yong Dai ¹

Xiaoping Xing ¹

Lin Sun ^{1, 3}

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School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, China |

Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China |

State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China |

Publication type: Journal Article

Publication date: 2025-01-25

Springer Nature

Journal: Water, Air, and Soil Pollution

scimago Q2

SJR: 0.583

CiteScore: 4.5

Impact factor: 3.8

ISSN: 00496979, 15732932

DOI: 10.1007/s11270-025-07774-w

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Abstract

Water pollution is a growing concern, particularly hexavalent chromium, a toxic pollutant that poses serious environmental and health risks due to its persistence and bioaccumulation. In this study, zeolite A–X was synthesized using an ultrasonic-alkali fusion hydrothermal method, with coal fly ash serving as the source of silica and aluminum, to treat chromium-containing wastewater. The zeolite A–X was successfully synthesized at an alkali-to-ash ratio of 1.5, a hydrothermal temperature of 90 °C, and a hydrothermal time of 12 h. Batch adsorption experiments showed that zeolite A–X achieved optimal adsorption of Cr (VI) at 13.73 mg g−1 under a pH of 3.

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Publisher

Springer Nature

Journal

Water, Air, and Soil Pollution

scimago Q2

SJR

0.583

CiteScore

4.5

Impact factor

3.8

ISSN

00496979 (Print)

15732932 (Electronic)