Geochemistry and Environment of the Cadmium in the Soil and Sediments at the Surface of Guizhou Province

Cadnmium is a trace element. The high cadnmium gives birth to the hazards for the propagation, if excessive which induce a variety of toxic diseases and even death. The geochemistry of the cadmium and its coverage regulation, existence patterns and biogeochemical effects are integrated in employing the regional geochemical data, especially analyzing the cadmium geochemistry in the materials of surface soil and stream sediments. The studies show that the cadmium mainly emerged from carbonate rocks and its weathered soil and sediments, the anomaly of high cadmium, and the contents of the zinc and organism in the low-middle hydrothermal are affined to ore-forming process. It takes multiform shapes of the chemical combination, but the dissolved and exchanged forms in existence could yield the biochemical effect. The possibility of occurring the pollutions as cadmium mercury, arsenic, lead and thallium should be regarded and averted.