Adsorption of ammonia in wastewater using zeolite synthesized from coal fly ash
244 viewsDOI:
https://doi.org/10.54939/1859-1043.j.mst.VITTEP.2022.178-184Keywords:
Coal fly ash; Zeolite A; Adsorption; Ultrasound; Ammonium ions.Abstract
Class F fly ash from Duyen Hai thermal power plant in Vietnam was used to synthesize zeolite A for the adsorption of ammonium in wastewater. Well-ordered cubic zeolite A was first synthesized using fly ash as source material by hydro-thermal method assisted by ultrasound. This material was characterized by XRD, SEM to study the morphology and crystallinity. The adsorption properties of ammonium ions (NH4+) from aqueous medium onto zeolite A were investigated as a function of parameters such as equilibrium time, initial NH4+ concentration, amount of zeolite used. The synthesized zeolite A displayed a fast adsorption rate and high adsorption capacity, indicating that this is a potential material for the treatment of NH4+ from wastewater, especially in advanced ammonium treatment stages. The study shows that the adsorption process follows the Langmuir and Freundlich adsorption isotherms simultaneously.
References
[1]. Benjamin M. M., Lawler D. F. “Water Quality Engineering: Physical/Chemical Treatment Processes”, 1st Edition, Wiley, (2013).
[2]. Bộ Tài nguyên và Môi trường, “Báo cáo hiện trạng môi trường quốc gia giai đoạn 2016-2020”, (2016).
[3]. Bộ Tài nguyên và Môi trường, “Báo cáo môi trường quốc gia 2017- Chuyên đề quản lý chất thải”, (2017).
[4]. Jha B., Singh D. N., “A Review on synthesis, characterization and industrial applications of flyash zeolites”, Journal of Materials Education, Vol.33 (1-2), tr. 65-132, (2011).
[5]. Jha V.K., Hayashi S., “Modification on natural clinoptilolite zeolite for its NH4+ retention capacity”, Journal of Hazardous Materials, 169 (1-3), pp. 29–35, (2009). DOI: https://doi.org/10.1016/j.jhazmat.2009.03.052
[6]. Lei L.C., Li X.J., Zhang X.W. “Ammonium removal from aqueous solutions using microwave-treated natural Chinese zeolite”, Separation Purification Technology, 58 (3), pp. 359–366, (2008). DOI: https://doi.org/10.1016/j.seppur.2007.05.008
[7]. Lê Văn Tâm, Nguyễn Thanh Tùng, Lê Thị Thu Thủy, Phạm Hồng Nhật, “Tác động của siêu âm lên quá trình tổng hợp zeolite A từ tro bay than”, Tạp chí Phát triển Khoa học và Công nghệ - Khoa học Trái đất và Môi trường, (2022).
[8]. Nguyễn Trần Hồng Phương, “Tổng hợp zeolite 4A từ cao lanh và khảo sát khả năng hấp phụ ion amoni của zeolite 4A”, Khóa luận tốt nghiệp, Trường Đại học sư phạm TP. Hồ Chí Minh, (2013).
[9]. Visa M., Popa N. “Adsorption of Heavy Metals Cations onto Zeolite Material from Aqueous Solution”, Journal of Membrane Science & Technology, 5 (1):133, (2015).
[10]. Wang J., Guo X. “Adsorption isotherm models: Classification, physical meaning, application and solving method”, Chemosphere, Volume 258, 127279, (2020). DOI: https://doi.org/10.1016/j.chemosphere.2020.127279
[11]. Zhao Y., Zhang B., Zhang X., Wang J., Liu J., Chen R. “Preparation of highly ordered cubic NaA zeolite from halloysite mineral for adsorption of ammonium ions”, Journal of Hazardous Materials, 178 (1-3), pp. 658–664, (2010). DOI: https://doi.org/10.1016/j.jhazmat.2010.01.136
