SITE ENERGY DISTRIBUTION ANALYSIS FOR EFFECT OF SORBED NONYLPHENOL ON SORPTION OF PHENANTHRENE

To investigate the effect of different levels of sorbed nonylphenol(NP)on sorption of phenanthrene onto hydrophilic solid phase. Pre-sorption method was done to gain the particles with different levels of sorbed NP, and then sorption isotherm experiment of phenanthrene was conducted using the batch experiment method, while site energy distribution analysis was done to indicate the change of site energy distribution of phenanthrene on different particles. It was found that phenanthrene sorption on the low organic content natural water particles, organic free particles, and kaolinites fits well with the Freundlich model. Sorbed NP at low concentrations could inhibit the sorption of phenanthrene onto the hydrophilic particle surface,because the number of sorption sites was reduced by sorbed NP. However, at higher concentrations, sorbed NP changed to enhance the phenanthrene sorption, because sorbed NP at relative high level could provide new low-energy sites for phenanthrene sorption.