Simulating experiments of enrichment of gold by bacteria and their geochemical significance

摘要

The experiments on the enrichment of gold by bacteria indicate that bacteria have a very intense capacity of enriching gold and act as an arrester of trace gold in sea water. Bacteria enrich gold in two forms: absorption and adsorption. Absorption means that god finds its way into organisms and it is combined with the mercapto group of protein, whereas adsorption means that gold is adsorbed on organisms by amino acid secreted by cell walls. Bacteria are or- ganisms with very high vitality and reproductive capacity and huge productivity in nature.