The complexation of iron by marine humic acid
Abstract Cation exchange capacity measurements, performed before and after removal of humic acid from 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 allow quantitative determination of the extent of reaction between a naturally occurring humic acid and iron in artificial seawater. Humic acid-iron complexes are formed whose solubilities depend on the humic acid-iron ratio used in the experiment. This study suggests that humic acid is a transporting agent for trace metals in a marine environment.
The variational trend of agglomerate intensity after enhancing ferrum and reducing silicon in vanadium titanium magnetite and the measures of improving intensity at the condition of high-ferrum and low-silicon have been studied.