How does the pH of the solution affect the adsorption of nitrobenzene onto CSDAC?

Label:chem

Topic
The pH of the solution can influence the adsorption process by affecting the surface charge of the adsorbent and the ionization state of the adsorbate.
Answer
The adsorption of nitrobenzene onto CSDAC is pH-dependent. The highest adsorption efficiency is observed at pH 9, where the characteristic bands of nitrobenzene in the FTIR spectra are most intense. This suggests that at higher pH values, the deprotonation of surface functional groups on CSDAC enhances electrostatic interactions with the nitrobenzene molecules, facilitating adsorption.
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