Bacteria nickel-cadmium

There are concerns that land application of sludge will result in an increase of pathogenic bacteria, viruses, parasites, chemicals and metals in drinking water reservoirs, aquifers, and the food chain. This raises additional concerns of cumulative effects of metals in cropped soils. Research shows that if metals such as zinc, copper, lead, nickel, mercury, and cadmium are allowed to build up in soils due to many applications of sludges over the years, they could be released at... 

Numerous laboratory experiments attest to the feasibility of biogenic formation of sulfides from metals other than iron. Miller (1950b), using sulfate-reducing bacteria, demonstrated the formation of sulfides of antimony, bismuth, cobalt, cadmium, nickel, lead, zinc and iron. Baas Becking and Moore... 

At least one-third of the elements in the Periodic Table have experienced changes in valence states induced by microbial achvity. While some metals (iron, calcium, potassium) serve as an essential source for nutrients in bacterial systems, others are introduced as contaminants (lead, nickel, cobalt, cadmium) [2]. This cohabitation with such heavy-metal pollutants has forced organisms among marine bacteria to develop a high metal tolerance, which in turn makes them an interesting source for templahng the constrained synthesis of metal/metal oxide nanoparticles. 

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