Abstract
Abstract The chemical composition of the organic fraction (extractable polymer) from six sediments was examined. These fractions were obtained by heating the sediment solids at 80°C and precipitating the polymeric material from the supernatant liquors with an ethanol: acetone mixture. Three gully pot sediments and three sewer sediments were examined. Based on the volatile component of the sediments and polymers, the results showed that the gully pot sediments gave a lower yield of extractable material and that the gully pot polymers contained more polysaccharide material but bound fewer calcium ions. These results are used to suggest what some of the processes of sediment ageing may entail.
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