Abstract
Heavy metals are transported from the upper to the lower of river in three states; solved in water, adshered or adsorbed to floating matters, and together with the bed sediment adhering or adsorbing them. We examined in this report how mercury is transported in river. We confirmed that the membrane filter did not adsorb the mercury compound unspecifically and used the membrane filter to separate river water into soluble and unsoluble solid fractions. As a result it became obvious that most mercury compound was contained in the floating matters, which transported the mercury to the lower stream.
