AWWA ACE70575

This powerpoint presentation begins by providing a brief overview of perchlorate and cationic surfactants. Hypotheses to test were: thiosulfate and other reduced sulfur speciescompetes with perchlorate for adsorption siteson the tailored granular activated carbon (GAC); proportional diffusivity is not the appropriatesimilitude equation for surfactant tailored GAC; and, loading of surfactant to GAC plays a role inperchlorate adsorption. Topics covered include: reduced sulfur species; thiosulfate oxidation rate; and, effect of anions on perchlorate adsorption to TGAC. Conclusions indicated that: Thiosulfate affects the adsorption of perchlorate toTailored GAC; proper prechlorination can markedly diminish theeffects of thiosulfate; anions such as nitrate interfere with the adsorptionof perchlorate to TGAC; and, oxidized forms of sulfur (SO₄^2-) do not affect theadsorption of perchlorates as much as thiosulfate. Includes table, figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2009

Number of Pages:

22

File Size:

1 file , 1 MB