Abstract
The effect of the aqueous solution pH and ligand type (H2PO-4, HPO2-4, H2CO3, HCO-3 Cl-, and ClO-4) on acridine adsorption to silica was studied in a series of continuous-flow column experiments. The extent of acridine adsorption at solution pH's above its pKa was enhanced when H2CO3/HCO-3 was used as a buffer rather than H2PO-4/HPO2-4, due to more exothermic hydration enthalpy of the H2CO3/HCO-3 buffer. The greater polarity of the acridinium cation and/or acridinium cation/ligand complexes at solution pH's below the pKa of acridine minimized the effect of differences in ligand hydration enthalpies on acridine adsorption. These results suggest that acridine mobility in groundwater would be buffer dependent.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
