抄録
Bacteria play an important role in various transportation, concentration and crystallization processes of elements in the earth environmental system.Microbial mineralization is a key role for the concentration of toxic elements and spoiled water systems.Electron microscopic studies have disclosed crystallization of turquoise and jarosite in the early stage of the remediation experiment, conducted at room temperature, by using activated sludge.Amorphous materials concentrated on cell walls at incipient stage, are finally transformed into well-defined crystal structure of biominerals.Various minerals such as carbonate, silicates, iron oxide, hydrate phosphates, sulphides and radioactive materials are produced through bacterial biomineralization and microbial remediation processes.In addition to biomineralization, biodegradation of a variety of hazardous and toxic chemicals in the abandoned mining sites, concrete erosion and river-water ecosystem etc., has also been found.
