{'fraction_non_alphanumeric': 0.022809123649459785, 'fraction_numerical': 0.022809123649459785, 'mean_word_length': 4.914893617021277, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Temperature Effect on the Surface Charge Properties of gamma-Al2O3.

A comprehensive study of the surface properties of the gamma-Al2O3 in KNO3 as a function of temperature was undertaken potentiometrically. Surface charge, ionization and complexation constants, and PZC were calculated from the potentiometric titration data in the temperature range 293-333 K. A difference between the PZC and CIP was observed as a result of the adsorption of NO-3 ions. A simple graphical procedure based on the mass action law was used to determine the number of surface sites and equilibrium constants. Thermodynamic parameters, which showed a decrease in the role of nitrate NO-3 ion in the charging mechanism of gamma-Al2O3, were also evaluated, whereas that of K+ ion increased with the increase in temperature. Copyright 1998 Academic Press.