Environmental Chemistry

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The components of soil humus is of great
importance to environment. These macromolecule
compounds help with the conservation of soil moisture
and heat. They have large superficial area and thus
present strong adsorption to pollutants by forming loose
congeries (疏松的聚集体) through hydrogen bond.
Besides, soil humus contains many kinds of
functional groups such as carboxyl, phenolic hydroxyl
group, alcoholic hydroxyl group, carbonyl and methoxyl,
etc. and thus present strong tendency of complexation
and chelation to metallic ion, which is advantageous
when these materials are nutrients to plants and
otherwise not.