Organic material , biologically formed

PROBABLE FATE photolysis-, not important in aquatic environment oxidation-. Ag and Ag+ compounds (most insoluble) only forms usually present (both precipitate) hydrolysis important only at high pH, where AgjO may precipitate volatilization not important sorption strongly sorbed by MnOi, then released in saline water, some adsorption by clays and organic materials biological processes bioaccumulated by many aquatic organisms... 

Any sedimentary deposit or foulant that fails to form a crystalline scale. Often the result of supersaturation or the binding of biological or other organic material with dust, sand, or other mineral deposits. Also, sludge is not always deposited at point of origin and can additionally bake onto heat transfer surfaces. 

The transfer of P from land to terrestrial biota (F23) represents the sum of terrestrial biological productivity. There is no significant gaseous form of P, nor is there a major transfer of living organisms between the freshwater-terrestrial system and the oceans. The terrestrial biota system is, therefore, essentially a closed system where the flux of P to the biota (p23) is balanced by the return of P to the land from the biota (F32) due to the decay of dead organic materials. 

Several elements, particularly zinc and copper, could play a role as trace nutrients for phytoplankton. They are known to be important for growth of terrestrial plants, but neither the requirement for these nutrients nor the elemental distributions in seawater are well known. The biological availability of both zinc and copper is controlled by their complexation with organic material. Analytical methods that have the distinction of being able to discriminate chemical forms of the metal are needed. These measurements reflect the chemical reactivity and biological availability or toxicity of the metal more accurately. 

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