Nitrogen K-edge X-ray adsorption near-edge structure spectroscopy of chemically adsorbed ammonia gas on clay minerals and the < sup > 15 < /sup > N/ < sup > 14 < /sup > N-nitrogen isotopic fractionation

In this study, adsorption experiments were conducted using gaseous NH3 and representative clay minerals. The strongly adsorbed NH3 was 15N-enriched in a state of chemical equilibrium between the adsorption and desorption on the siliceous host surface. The nitrogen K-edge X-ray adsorption near-edge structure spectroscopy study revealed that these initial ammonia gases were chemically adsorbed as ammonium ions (NH4+) on clay minerals.PMID:38311696 | DOI:10.1007/s44211-023-00503-5
Source: Anal Sci - Category: Chemistry Authors: Source Type: research