Synthesis of Zeolite from Fly Ash and Hollow Glass Microspheres for Cl−Ion Adsorption

Wang, Shiyu; Yang, Rui; Chen, Liguo; Wang, Xihao; Liu, Yuhao; Zhou, Ranran; Song, Jing; Jin, Qijie; Zhou, Changcheng; Xu, Haitao

doi:10.3390/environments13030126

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Open AccessFeature PaperArticle

Synthesis of Zeolite from Fly Ash and Hollow Glass Microspheres for Cl⁻Ion Adsorption

by

Shiyu Wang

¹,

Rui Yang

¹,

Liguo Chen

¹,

Xihao Wang

¹,

Yuhao Liu

¹,

Ranran Zhou

¹,

Jing Song

²,

Qijie Jin

^1,2,*

,

Changcheng Zhou

² and

Haitao Xu

^1,2,*

¹

School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 210009, China

²

Nanjing Gekof Institute of Environmental Protection Technology & Equipment Co., Nanjing 210031, China

^*

Authors to whom correspondence should be addressed.

Environments 2026, 13(3), 126; https://doi.org/10.3390/environments13030126

Submission received: 3 February 2026 / Revised: 20 February 2026 / Accepted: 21 February 2026 / Published: 24 February 2026

(This article belongs to the Topic Functionalized Materials for Environmental Applications)

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Abstract

One-step hydrothermal synthesis of zeolites is a common synthesis technology for zeolites. Las-NaP1 zeolite was synthesized with fly ash (FA) as the silica-alumina source under low-alkalinity conditions for aqueous adsorption. Furthermore, H-NaP1 modified zeolite, a high-efficiency chloride ion (Cl⁻) adsorbent, was fabricated using hollow glass microspheres (HGMs) and FA as a silica-alumina source. The structure of the material was characterized by XRD, SEM, TEM, BET, XPS, FT-IR, Zeta, and other techniques. Effects of the synthesis process and adsorption conditions on the adsorption performance of Cl⁻ and its mechanism were systematically studied. The maximum adsorption capacity of H-NaP1 for Cl⁻ (193.57 mg/g) is 12 times that of Las-NaP1 (15.48 mg/g). The adsorption process conformed to the pseudo-second-order kinetic model and the Freundlich isotherm model. The addition of HGMs effectively inhibited the agglomeration of zeolite particles. This research provided a new idea for the synthesis of efficient dechlorination materials with low alkali and realized the high-value-added utilization of FA.

Keywords: fly ash; hollow glass microspheres; modified zeolite; chloride ion adsorption; low alkali synthesis

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MDPI and ACS Style

Wang, S.; Yang, R.; Chen, L.; Wang, X.; Liu, Y.; Zhou, R.; Song, J.; Jin, Q.; Zhou, C.; Xu, H. Synthesis of Zeolite from Fly Ash and Hollow Glass Microspheres for Cl⁻Ion Adsorption. Environments 2026, 13, 126. https://doi.org/10.3390/environments13030126

AMA Style

Wang S, Yang R, Chen L, Wang X, Liu Y, Zhou R, Song J, Jin Q, Zhou C, Xu H. Synthesis of Zeolite from Fly Ash and Hollow Glass Microspheres for Cl⁻Ion Adsorption. Environments. 2026; 13(3):126. https://doi.org/10.3390/environments13030126

Chicago/Turabian Style

Wang, Shiyu, Rui Yang, Liguo Chen, Xihao Wang, Yuhao Liu, Ranran Zhou, Jing Song, Qijie Jin, Changcheng Zhou, and Haitao Xu. 2026. "Synthesis of Zeolite from Fly Ash and Hollow Glass Microspheres for Cl⁻Ion Adsorption" Environments 13, no. 3: 126. https://doi.org/10.3390/environments13030126

APA Style

Wang, S., Yang, R., Chen, L., Wang, X., Liu, Y., Zhou, R., Song, J., Jin, Q., Zhou, C., & Xu, H. (2026). Synthesis of Zeolite from Fly Ash and Hollow Glass Microspheres for Cl⁻Ion Adsorption. Environments, 13(3), 126. https://doi.org/10.3390/environments13030126

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Synthesis of Zeolite from Fly Ash and Hollow Glass Microspheres for Cl⁻Ion Adsorption

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