This powerpoint presentation begins by providing a brief overview of endocrine disrupting chemicals (EDCs) and pharmaceuticals/personal care products (PPCPs). Study objective was to examine whether molecular descriptors/properties are capable
of predicting the breakthrough of a varied set
of EDCs/PPCPs, and whether the same properties that are considered at
ppm/ppb concentrations still relevant at ppt
(part-per-trillion) levels. The research approach involved the following: rapid small scale column tests (RSSCTs) with
activated carbons and water dosed with EDCs/PPCPs;
measure effluent EDC/PPCP concentrations using liquid
chromatography and mass spectrometry (SNWA);
measure pore volume and slurry pH of test carbons;
collect and/or calculate set of properties and structural
descriptors for test compounds; and,
normalize test data between carbons and test theoretically
likely predictors (a<0.001) for correlation with test outcome. Presentation conclusions were that: adsorption at very low concentrations can often contradict
intuition (e.g. Log Kow - reduced influence);
even at ppt levels, pore volume and slurry pH are still deciding
factors for an aqueous phase carbon's ability; and,
one predictor can describe the adsorption of many different
types of compounds, but may not describe all levels of
breakthrough. Includes figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 2.3 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 33 |
| Published : | 11/01/2009 |
