Synthesis of porous carbon/zeolite composites by low-temperature acid-alkaline leaching from coal gasification fine slag for adsorption of dye wastewater

The conversion and utilization of coal gasification slag is considered one of the key issues in the development of the modern coal chemical industry. In this work, porous carbon/Na-P1 zeolite composites were successfully prepared by a simple and easy-to-operate acid-alkali leaching method on the bas...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of environmental chemical engineering 2024-06, Vol.12 (3), p.112819, Article 112819
Hauptverfasser: Tang, Biao, Sun, Zhenjie, Men, Xiaoyong, Dong, Kaiming, Wang, Jiajun, Kong, Lingwei, Bai, Yonghui, Guo, Feiqiang
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The conversion and utilization of coal gasification slag is considered one of the key issues in the development of the modern coal chemical industry. In this work, porous carbon/Na-P1 zeolite composites were successfully prepared by a simple and easy-to-operate acid-alkali leaching method on the basis of the composition of coal gasification fine slag. The synthesized CZ-10 possessed a honeycomb-like porous carbon structure and a typical flower-cluster zeolite structure, with the specific surface area and pore volume reaching 195.68 m2/g and 0.257 m3/g, respectively. CZ-10 showed excellent adsorption performance, with an equilibrium adsorption capacity of 175.93 mg/g on methylene blue (MB) at 300 K. CZ-10 can effectively adsorb MB in a wide pH range, and the increase in pH was favorable for adsorption. According to the results of adsorption kinetics and isothermal adsorption experiments, the adsorption process was in good agreement with PSO model and Sips model. According to the characterization results and adsorption experiments, it was speculated that the adsorption of CZ-10 on MB was mainly chemisorption, and may be affected by various factors such as ion-exchange, electrostatic attraction, hydrogen bonding, π-π bonding and van der Waals forces. [Display omitted] •Porous carbon/zeolite composites were synthesized from coal gasification slag.•The synthesis process was convenient and the reactions were conducted at low temperatures.•Morphology and adsorption properties were changed by controlling the alkali leaching time.•The specific surface area and pore volume reached 195.68 m2/g and 0.257 cm3/g.•The equilibrium adsorption capacity of CZ-10 reached 175.93 mg/g for methylene blue solution.
ISSN:2213-3437
2213-3437
DOI:10.1016/j.jece.2024.112819