Huminous

The organic zeolites as here defined are made from carbonaceous, resinous and huminous materials and operate in the cation-exchange cycle employing sodium in regeneration.

In the carbon balance there are some differences in the share or bituminous and huminous carbon, free hydrocarbon contents as well as hydrogen and oxygen indices, but ...

On the other hand, the strength of the connection which the ion of a heavy metal establishes with its substrate will directly determine its mobility -- the ion bound by weak, adsorptive connections to some substrate will easily convert into a solution, while the huminous associated metals will be firmly gound to their substrate.