Influence of chemical charge on the fate of organic chemicals in sediment particle size fractions.

In order to investigate the influence of differently sized particle fractions on the fate of ionic chemicals in water-sediment systems, we performed simulation studies following OECD guideline 308. We used C-labelled anionic (4-n-dodecylbenzenesulfonic acid sodium salt, 'C-DS'), cationic (4-n-dodecylbenzyltrimethyl ammonium chloride, 'C-DA') and non-ionic (4-n-dodecylphenol, 'C-DP') organic chemicals. The sediment was subjected to particle size fractionation.