Phosphate Adsorption on ?-Alumina: A Surface Complex Model Based on Surface Characterization and Zeta Potential Measurements
نویسندگان
چکیده
An innovative approach using solid/liquid interface characterization (zetametry measurements, ATR-IR), coupled with ex situ FTIR has been used to build a phosphate complexation model at the alumina surface via PHREEQC software. According phosphorus coverage impregnated on surface, two mechanisms of adsorption have identified: specific complex adsorbed predominant facet and precipitation process. At low (P < 1.2 at/nm2), proceeds mainly through monodentate ?1-AlIV-OH sites located (110) facet, bidentate involving ?1-AlV-OH is also discussed. However, concentration these particular limited. Thus, above threshold at/nm2, occurs formation an amorphous AlPO4 phase, experimentally observed by zetametry measurements.
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ژورنال
عنوان ژورنال: Journal of Physical Chemistry C
سال: 2021
ISSN: ['1932-7455', '1932-7447']
DOI: https://doi.org/10.1021/acs.jpcc.0c11553