Date of Award


Degree Type


Degree Name

Master of Science in Food and Resource Chemistry


Food and Resource Chemistry

First Advisor

George T. Felbeck


Cation exchange capacity measurements, performed before and after removal of the humic acid fraction from various Narragansett Bay sediments, indicate that low concentrations of these organic substances strongly influence the ability of the sediment to react with metal ions. Atomic absorption and spectrophotometric methods have been developed which allow quantitative determinations of the extent of reactions between a naturally occurring humic acid and iron in artificial seawater. The results indicate that different humic acid-iron complexes are formed with varying solubilities depending on the humic acid-iron ratio used in the experiment. This study suggests that humic acid is a transport substance for trace metals in Narragansett Bay.



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