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- W2229131154 abstract "The importance and the roles of heteroatoms in the removal of chromium were investigated in this study. The heteroatom site densities including sulfur, nitrogen, oxygen and hydrogen were found to affect the surface acidity of activated carbons which in turn influenced the carbon metal sorption properties. Sulfur and nitrogen sites were found to have basic properties which impart positive charges on the carbon surface. This positive charge is found to promote the adsorption of bichromate ions. Oxygen and hydrogen sites exhibiting acidic properties, imparted negative charges on the carbon surface and was found to suppress Cr(VI) adsorption. The influence of heteroatoms to the surface chemistry of carbon is a useful basis in tailor making activated carbon adsorbents for specific uses." @default.
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- W2229131154 date "2004-01-01" @default.
- W2229131154 modified "2023-09-26" @default.
- W2229131154 title "Contributions of heteroatoms to activated carbon surface acidity and their effects in the removal of hexavalent chromium from wastewaters" @default.
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