Ammonium chloride–metal hydride based reaction cycle for vehicular applications

Stewart, Helen G.; Humphries, Terry D.; Sheppard, Drew A.; Tortoza, Mariana S.; Sofianos, M. Veronica; Liu, Shaomin; Buckley, Craig E.

doi:10.1039/c9ta00192a

Cited by 7 publications

(1 citation statement)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is convenient to highlight that there was no other peak corresponding to the loss of structural water for this sample, which occurred during the zeolite calcination at 500°C. It should be noted that other studies have reported the decomposition of NH 4 Cl at 310°C [89]. Based on the DTG curve of CH-MS, it was concluded that this compound was not present in the modified zeolite.…”

Section: Resultsmentioning

confidence: 90%

Adsorption of Arsenic, Lead, Cadmium, and Chromium Ions from Aqueous Solution Using a Protonated Chabazite: Preparation, Characterization, and Removal Mechanism

Pinedo-Torres

Bonilla-Petriciolet

García-Arreola

et al. 2023

Adsorption Science & Technology

View full text Add to dashboard Cite

The adsorption of As(V), Pb(II), Cd(II), and Cr(III) ions from aqueous solutions on natural and modified chabazite was studied. The functionalization of chabazite was performed via a protonation and calcination with the aim of generating Lewis acid sites to improve its anion exchange properties. The surface and physicochemical properties of both adsorbents were studied and compared. The adsorption isotherms of tested heavy metal ions were quantified and modeled to identify the best isotherm equation. Steric parameters for the adsorption of these ions were also calculated with a monolayer statistical physics model. Natural chabazite showed the maximum adsorption capacity for Pb(II), while the modified zeolite improved its As(V) properties in 79%. These results showed that the modified zeolite was able to remove both cations and anions from aqueous solution. The application of this functionalized chabazite can be extended for the removal of other anionic pollutants from water, thus opening the possibility of preparing new adsorbents with tailored properties for water treatment.

show abstract

Section: Resultsmentioning

confidence: 90%