Utilization of Fly Ash-Based Zeolite A as an Efficient Adsorbent for the Removal of Cationic Dyes from Aqueous Solutions
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Abstract
In this study, zeolite A was synthesized using silica extracted from fly ash obtained from the Mae Moh power plant in Lampang Province. The synthesized zeolite A was characterized using XRF, XRD, SEM, and BET techniques. The zeolite A was then utilized as an adsorbent for the removal of cationic dyes, namely malachite green and brilliant green, from aqueous solutions. The optimal adsorbent dosage and contact time for dye adsorption were investigated. The adsorption isotherms, kinetics, and thermodynamics were also investigated. The results indicated that the optimal dosages of the adsorbent for malachite green and brilliant green removal were 10 g/L and 20 g/L, respectively, with an optimal contact time of 60 minutes. The adsorption efficiencies were 96.00% and 95.91% at an initial dye concentration of 100 mg/L, respectively. The obtained adsorption isotherms corresponded to the Langmuir isotherm model. The kinetic studies indicated that the adsorption followed a pseudo-second-order kinetic model, suggesting monolayer adsorption on specific surface sites. The thermodynamic analysis showed that the enthalpy change (∆H°) was positive, indicating an endothermic adsorption process. The entropy change (∆S°) was positive, implying that the adsorption process increased the disorder of both the adsorbent and adsorbate molecules at the adsorbent surface interface. The Gibbs free energy change (∆G°) was negative, confirming that the adsorption process occurred spontaneously. Zeolite A exhibited high reusability, maintaining effective adsorption performance for up to 8 cycles. These findings demonstrate that this fly ash based-zeolite A is a highly efficient, cost-effective, and environmentally friendly adsorbent for removing malachite green and brilliant green from aqueous solutions.
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บทความที่ได้รับการตีพิมพ์เป็นลิขสิทธิ์ของ วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยอุบลราชธานี
ข้อความที่ปรากฏในบทความแต่ละเรื่องในวารสารวิชาการเล่มนี้เป็นความคิดเห็นส่วนตัวของผู้เขียนแต่ละท่านไม่เกี่ยวข้องกับมหาวิทยาลัยอุบลราชธานี และคณาจารย์ท่านอื่นๆในมหาวิทยาลัยฯ แต่อย่างใด ความรับผิดชอบองค์ประกอบทั้งหมดของบทความแต่ละเรื่องเป็นของผู้เขียนแต่ละท่าน หากมีความผิดพลาดใดๆ ผู้เขียนแต่ละท่านจะรับผิดชอบบทความของตนเองแต่ผู้เดียว
References
Lellis, B. and et al. 2019. Effects of textile dyes on health and the environment and bioremediation potential of living organisms. Biotechnology Research and Innovation. 3(2): 275-290.
Sartape, A.S. and et al. 2017. Removal of malachite green dye from aqueous solution with adsorption technique using Limonia acidissima (wood apple) shell as low cost adsorbent. Arabian Journal of Chemistry. 10(Suppl. 2): S3229-S3238.
Olah, J. and Farkas, J. 1978. Effect of temperature, pH, antibiotics, formalin and malachite green on the growth and survival of Saprolegnia and Achlya parasitic on fish. Aquaculture. 13(3): 273-288.
Srivastava, G.C. and Srivastava, R.C. 1978. A note on the potential applicability of malachite green oxalate in combating fish-mycoses. Mycopathologia. 64(3): 169-171.
Muinde, V.M. and et al. 2020. Adsorption of malachite green dye from aqueous solutions using mesoporous chitosan–zinc oxide composite material. Environmental Chemistry and Ecotoxicology. 2: 115-125.
Katheresan, V., Kansedo, J. and Lau, S.Y. 2018. Efficiency of various recent wastewater dye removal methods: A review. Journal of Environmental Chemical Engineering. 6(4): 4676-4697.
Abdelrahman, E.A. 2018. Synthesis of zeolite nanostructures from waste aluminum cans for efficient removal of malachite green dye from aqueous media. Journal of Molecular Liquids. 253: 72-82.
Ngamcharussrivichai, C. and et al. 2008. Adsorptive removal of thiophene and benzothiophene over zeolites from Mae Moh coal fly ash. Fuel. 87(10-11): 2347-2351.
Fan, Y. and et al. 2023. Synthesis of zeolite A from fly ash and its application in the slow release of urea. Waste Management. 158: 47-55.
Sukchit, D. and et al. 2025. Synthesis and characterization of zeolite A from industrial fly ash as a green, cost-effective, Cd2+ and Pb2+ adsorbent for wastewater applications. ACS Omega. 10: 5981−5992.
Lv, Y. and et al. 2022. Adsorption behavior and mechanism of mixed heavy metal ions by zeolite adsorbent prepared from lithium leach residue. Microporous and Mesoporous Materials. 329: 111553.
He, X. and et al. 2020. Coal fly ash derived zeolite for highly efficient removal of Ni2+ in waste water. Powder Technology. 367: 40-46.
Haroon, M. and et al. 2021. Efficient adsorption of malachite green from water by activated carbon of date trunk fiber. Journal of Applied and Emerging Sciences. 11(1): 57-62.
Diehl, M. and et al. 2023. Cassava bagasse as an alternative biosorbent to uptake methylene blue environmental pollutant from water. Environmental Science and Pollution Research. 30: 51920-51931.
Al-dahri, T., Abdulrazak, A.A. and Rohani, S. 2020. Preparation and characterization of Linde-type A zeolite (LTA) from coal fly ash by microwave-assisted synthesis method: Its application as adsorbent for removal of anionic dyes. International Journal of Coal Preparation and Utilization. 42(7): 2064-2077.
Liu, Z. and et al. 2019. One-step high efficiency crystallization of zeolite A from ultra-fine circulating fluidized bed fly ash by hydrothermal synthesis method. Fuel. 257: 116043.
Mittal, A. 2006. Adsorption kinetics of removal of a toxic dye, Malachite Green, from wastewater by using hen feathers. Journal of Hazardous Materials. 133(1-3): 196-202.
Suhaimi, A. and et al. 2025. Design of composite chitosan/algae/zeolite by freeze- or air-drying: A comparative adsorbent analysis for optimized removal of brilliant green dye. International Journal of Biological Macromolecules. 288: 138650.
