| ecophysiology and geochemistry of microbial arsenic oxidation within a high arsenic, circumneutral hot spring system of the alvord desert. | microbial metabolism of arsenic has gained considerable interest, due to the potential of microorganisms to drive arsenic cycling and significantly influence the geochemistry of naturally arsenic-rich or anthropogenically arsenic-polluted environments. alvord hot spring in southeastern oregon is a circumneutral hot spring with an average arsenic concentration of 4.5 mg l(-1) (60 microm). hydrogeochemical analyses indicated significant arsenite oxidation, increased ph and decreased temperature al ... | 2008 | 18318711 |