β Scribed by Dale Eric Wurster; Aktham Aburub
No coin nor oath required. For personal study only.
The effect of hydrolyzing lactone functional groups on the surfaces of different activated carbons upon the specific and nonspecific interactions between phenobarbital and activated carbon surfaces was studied. The effect of temperature on both specific and nonspecific interactions was also studied. The increase in OH groups on the surfaces of activated carbons, as a result of hydrolyzing surface lactone groups, caused an increase in the specific adsorption capacity (K 2 ) for phenobarbital without having a significant effect on the hydrophobic bonding capacity (K HB ). Increasing the temperature at which the adsorption experiment was carried out, on the other hand, resulted in a decrease in K HB without having a significant effect on K 2 . The decrease in K HB per unit temperature increase was the same regardless of the activated carbon. These results are in very good agreement with the modified-Langmuir-like equation (M-LLE).
π SIMILAR VOLUMES
We have examined the effect of pH and temperature on the solubility of 3-(4-heptylbenzoyl) benzoic acid (1), a surface active carboxylic acid with a pKa of 4.83 and a critical micelle concentration (cmc) of 4 X 10(-4) M. Our results show that below a pH of 7.0 and a temperature of 50 degrees C, the
Technology of China (MOST), and the Chinese Academy of Sciences (CAS).
In this investigation surface force, X-ray photoelectron spectroscopy and ellipsometry techniques have been used to study the adsorption of a low-charge-density cationic polyelectrolyte on negatively charged surfaces. It is shown that the low cationicity of this polyelectrolyte induces an adsorption
The changes produced in an activated carbon by treatment in aqueous solutions of (NH 4 ) 2 S 2 O 8 and H 2 O 2 are compared with the modifications produced by oxygen plasma. These changes are monitored by measuring the textural characteristics (surface areas, porosity, pore size distributions) and s
The performances of three wood-based activated carbons as adsorbents of hydrogen sulfide were evaluated by dynamic breakthrough testing. The subsequent products of H 2 S oxidation on the carbon surfaces were analyzed. The adsorbents were studied using sorption of nitrogen, thermal analysis, Boehm ti