Pure zeolite LTJ synthesis from kaolinite under hydrothermal conditions and its ammonium removal efficiency

Kamyab, Seyedeh Mahsa; Williams, Craig D.

doi:10.1016/j.micromeso.2021.111006

Cited by 7 publications

(4 citation statements)

References 94 publications

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“…Fu et al [27] obtained the maximum adsorption amount of ammonium of 16.96 mg/g by using zeolite modified with sodium nitrate (NaNO 3 ). Kamyab and Williams [12] reported that the maximum adsorptive amount of ammonium by Linde Type J zeolite was 51.97 mg/g. Meanwhile, Shabanet al [41] found that the adsorption capacities of ammonium by clinoptilolite and synthetic zeolite-A were, respectively, 92 mg/g and 99 mg/g.…”

Section: Adsorption Isotherms and Thermodynamicsmentioning

confidence: 99%

“…Zeolite has an excellent ion exchange capacity, and its cation exchange ranking is Cs + > Rb + > K + > NH 4 + > Sr + > Na + > Ca 2+ > Fe 3+ [10,11]. Its mineral framework comprises many openings, internal voids, or channels, which are beneficial to trap and bind ammonium [12]. Comparing with other adsorbents for ammonium removal, for example, clay minerals, activated carbon, exfoliated vermiculites, fly ash, peats, chitosan beads, wood sawdust, bentonite, attapulgite, oxide nanoparticles, and zero-valent iron, with disadvantages of complex preparation, high cost, or challenging for low concentration of ammonium removal, natural zeolite has great advantages, being of low cost and easy to obtain, having a high cationic exchange property, and is environment friendly, which allows zeolite as a particular attractive cation exchanger and absorbent to capture ammonium from wastewater [13].…”

Section: Introductionmentioning

confidence: 99%

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An Investigation into the Adsorption of Ammonium by Zeolite-Magnetite Composites

et al. 2022

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The discharging of ammonium from industrial, domestic, and livestock sewage has caused eutrophication of the water environment. The objectives of this study are to synthesize magnetic zeolite (M-Zeo) by an eco-friendly, economical, and easy procedure and to investigate its suitability as an adsorbent to remove ammonium from an aqueous solution. Based on characterization from XRD, BET, and SEM-EDS, Fe3O4 was proved to successfully load on natural zeolite. The effect of pH, temperatures, reacting times, initial ammonium concentrations, and regeneration cycles on ammonium adsorption was examined by batch experiments. The ammonium adsorption process can be best described by the Freundlich isotherm and the maximum adsorptive capacity of 172.41 mg/g was obtained. Kinetic analysis demonstrated that the pseudo-second-order kinetic model gave the best description on the adsorption. The value of pH is a key factor and the maximum adsorption capacity was obtained at pH 8. By using a rapid sodium chloride regeneration method, the regeneration ratio was up to 97.03% after five regeneration cycles, suggesting that M-Zeo can be recycled and magnetically recovered. Thus, the economic-efficient, great ammonium affinity, and excellent regeneration characteristics of M-Zeo had an extensively promising utilization on ammonium treatment from liquid.

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Section: Adsorption Isotherms and Thermodynamicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Investigation into the Adsorption of Ammonium by Zeolite-Magnetite Composites

et al. 2022

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“…[16] Zeolite LTJ was synthesized from raw kaolinite material via hydrothermal processes with potassium hydroxide. [17] In addition, several other zeolitic materials were also prepared from kaolinite or metakaolinite, such as FAU, [18] LSX zeolite, [19] NaY zeolite, [20] Beta, [21] and ZSM-5, [22] etc.…”

Section: Introductionmentioning

confidence: 99%

Preparation and modification of zeolite A from kaolin for catalytic methanation of carbon dioxide

Son,

Anh,

Thom

et al. 2023

Vietnam Journal of Chemistry

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Different types of zeolite including Zeolite A are prepared from natural kaolin originated in Vietnam. Raw kaolin was collected from Phu Tho, Vietnam, underwent metakaolization at 650 °C within 2 hours and alkalination with NaOH to synthesize various zeolitic samples. Various characterization techniques were performed, including X‐ Ray Diffraction, Fourier‐transform infrared spectroscopy, and Scanning Electron Microscopy. Different concentrations of NaOH were utilized to study the difference of the prepared zeolite. Nickel‐doped zeolite A samples with different nickel loading were also prepared via ion exchange method and were employed as catalyst for the hydrogenation of carbon dioxide (CO2) to obtain methane (CH4). The best catalytic activity of 55.2 %CO2 conversion and 92.7 %CH4 selectivity was achieved with 10 %Ni/ZM1 at 350 °C, 1 atm, H2:CO2 ratio of 4:1, and gas hourly space velocity of 9,000 mL.g‐1.h‐1. This study demonstrates a promising pathway of modifying Vietnamese natural kaolin as a low‐cost but an effective alternative material for the preparation of zeolite A and its application in the carbon dioxide methanation reaction.

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“…The obtained adsorption capacities were as follows: montmorillonite > WCE-DREO > halloysite > illite > kaolinite. The J-type Linde zeolite, synthesised from raw kaolinite by Kamyab and Williams, performed well in the sorption of ammonium ions from aqueous solutions [ 25 ]. Mahata et al [ 26 ] used Cu-loaded amine-functionalised SiO 2 and a weakly basic ion exchange resin for NH 4 + removal.…”

Section: Introductionmentioning

confidence: 99%

Removal of Ammonium Ions from Aqueous Solutions Using Weathered Halloysite

Leszczyński

2021

Materials

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This study investigated the use of weathered halloysite as an ion exchange material for ammonium removal from water. The study was conducted under static and dynamic conditions. The influence of such parameters as the preliminary concentration of ammonium ions, dose of halloysite, and pH was examined in periodic studies. The ion exchange capacity of weathered halloysite under various regeneration conditions such as concentration, excess of regeneration solution and the pH at which the regeneration was performed was also determined. The effect of flow velocity, initial NH4+-ions concentration was studied in column tests and the weathered halloysite’s ion -exchange capacity was also determined. The best results of ammonium ion removal were obtained at pH 6. The equilibrium isotherms were described using the Langmuir and Freundlich models. The results of periodic studies show a good fit for the data of both models, with Langmuir isotherms reflecting the removal of ammonium ions better. A good match for the data (R2 > 0.99) was provided by a pseudo second-order kinetic model. The obtained results indicate that a properly prepared halloysite can be a useful mineral for the removal of dangerous substances, such as ammonium ions, present in natural waters.

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Pure zeolite LTJ synthesis from kaolinite under hydrothermal conditions and its ammonium removal efficiency

Cited by 7 publications

References 94 publications

An Investigation into the Adsorption of Ammonium by Zeolite-Magnetite Composites

An Investigation into the Adsorption of Ammonium by Zeolite-Magnetite Composites

Preparation and modification of zeolite A from kaolin for catalytic methanation of carbon dioxide

Removal of Ammonium Ions from Aqueous Solutions Using Weathered Halloysite

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