Environmental compartments—transition

The concentrations of heavy metals both in river water and in river sediment are strongly changed by deposition-remobilization processes. The deterministic modeling of the transition between both environmental compartments is severely limited by the complex chemical, physical, and biochemical processes. 

The role of photocatalysis by transition metal complexes in the environment is reviewed, and its influence on composition of the environmental compartments, transport between them, and activation of the environmental self-cleaning behavior is characterized. In description of atmospheric processes, the attention is paid to coordination compounds as photocatalysts of the transfer and redox reactions of nitrogen oxides. In the case of hydrosphere and soils, various mechanisms of organic pollutant photodegradations are presented in which the iron, copper, and chromium complexes play... 

Photoreactions can change forms and the physicochemical behavior of coordination compoimds and thereby are responsible for transition metal transport between the environmental compartments. Some of these photoreactions are also of significance in natural cleaning to ensime continuity of the processes, catalyst reproducibility should be guaranteed, that is, the relevant photoreactions should belong to the photocatal5rtic family. 

Flux provides the transition concept and theoretical basis for combining the kinetics of chemical movement with their thermodynamic drive toward achieving equilibrium (i.e., equal fugacity) both across and within environmental compartments... 

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