Hydrothermal Synthesis and Characterization of Zeolite A from Corn (Zea Mays) Stover Ash

Abstract

This study deals with the impact of calcination, alkalinity, and curing time parameters on the hydrothermal synthesis of zeolite A. The zeolite A sample, produced from corncob-stalk-and-leaves (corn stover) ash was characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermo-gravimetric analysis (TGA), and scanning electron microscopy (SEM). The results showed that calcination, alkalinity, and curing time have significant effects on the crystallization and the morphology of zeolite A. In addition, these parameters also impacted the cation exchange capacity. Furthermore, the synthesized zeolite A was obtained using a calcination temperature of 5000 °C within two hours of airflow, which is much lower than the temperatures previously reported in the literature for an agricultural waste and other waste materials. A fusion ratio of corn stover ash:NaOH of 1.0:1.5 and a curing time of nine hours were achieved. This is a major result as this curing time is much lower than those featured in other studies, which can reach up to twenty-four hours. In this paper, cubic crystal with rounded edge of zeolite A, having a cation exchange capacity of 2.439 meq Na+/g of synthesized anhydrous zeolite A, was obtained, which can be a good candidate for ion-exchange separation.

Comparative lead adsorptions in synthetic wastewater by synthesized zeolite A of recycled industrial wastes from sugar factory and power plant

“…Therefore, the surface of ZBG and ZCF might be found alumino silicates of lead complexes or other coordination compounds after lead adsorption [ 103 ]. In addition, zeolite A might have an ion-exchange property for heavy metal adsorptions [ 104 , 105 ].

Figure 10 The possible mechanism of lead adsorptions on ZBG and ZCF.

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The Role of Zeolite Structure in Its β-cyclodextrin Modification and Tetracycline Adsorption from Aqueous Solution: Characteristics and Sorption Mechanism

“…The main mass occurred below 200 °C and is attributed to the release of adsorbed and zeolitic w [32,42,44]. Further weight loss can be attributed to dehydroxylation processes [45,46] total mass loss was 10.02%, 12.24% and 12.65% for NaX, NaA and NaP1, respectively curves of zeolites after modification indicate mass losses associated with water releas to about 180 °C), as well as significant mass loss attributed to dehydration and deco sition of organic matter (in the range about 250-400 °C) as reported for zeolites mod with chitosan [47,48] and cyclodextrin [36,39] The total mass loss was 38.2%, 30.28% 26.75% for NaX, NaA and NaP1, respectively. In summary, the mass loss associated the presence of the modifying compound can be reflected as 28.18% for NaX-CD, 18 for NaA-CD, and 14.10% for NaP1-CD, respectively, indicating the highest modific efficacy for the zeolite NaX, and the lowest for NaP1.…”

“…The main mass loss occurred below 200 • C and is attributed to the release of adsorbed and zeolitic water [32,42,44]. Further weight loss can be attributed to dehydroxylation processes [45,46]. The total mass loss was 10.02%, 12.24% and 12.65% for NaX, NaA and NaP1, respectively.…”