The mechanism is that neutral oil molecule is physically associated to the nonpolar group of the chelating agent pre-adsorbed on the mineral surface, resulting in an i…

It is mainly because the polar force in surface tension decreases which results from the increase of CH3 nonpolar group on the surface of silica particles shown from FTIR analysis.

Please group amino acids according to the nature of their side chains: hydrophobic, hydrophilic, polar and nonpolar.