Study of the adsorption of acetic acid on the surface of asphalt (bitumen) at temperatures different

Abstract

In this research, the adsorption of acetic acid solution was studied at a concentration (1 M) on
the asphalt surface at different temperatures (100, 80, 60, 40) m ° in the light of what appeared from
A previous study showed that the process of adsorption of a (1 Molar) acetic acid solution on the same surface could
took a period of 24 hours at room temperature, leaving a residue of unadsorbed acid in the

The solution has a concentration of 0.493 (Molar) and the amount of acid adsorbed on the surface is  3 10 *
17 mol / g. The presence of a residue of acid in the solution indicates that partial adsorption has occurred.
on the surface at room temperature, and on this basis the current study was conducted within
Thermal range (40-100) °C to determine the effect of temperature on the acetic acid adsorption process.

on the asphalt surface and its effect on the adsorption capacity of the surface.
The results of this research and the set of results obtained from the previous study showed
That asphalt has a limited ability to adsorb acetic acid on its surface, as shown by
The results from the presence of a residue of non-adsorbed acid in the solution at a certain concentration, as it appeared from
The previous study showed that the concentration of the unadsorbed acid after a long period of time reached

24 hours at room temperature was in the following order:
(0.493,0.333,0.1,0.025,0.014) molar, which corresponds to the initial concentration of the acid
(1.0,0.5,0.25,0.1,0.05) molar as shown in Table (1-3), which indicates that

Partial or incomplete adsorption of all acid concentrations.
Also, the current study showed the presence of residues of non-adsorbed acid in the solution when
A higher temperature within the range (40-100) °C, although a noticeable change in the adsorbent amount appeared.
of acid with a concentration of 1 M, with the increase in temperature as shown in Table 2)
(3- Comparison with the amount of acid adsorbed in the previous study on the same surface at

Room temperature Table (1-3).