Biosolubilization of Heavy Metals Present in Polluted Soils from Romplumb Area, Baia-Mare

Abstract

Soil pollution with heavy metals from metallurgical activities constitutes serious problems for both environment and humans. Iron and sulfur oxidizing microorganisms, from category Acidithiobacillus ferooxidans and thiooxidans, can solubilise heavy metals from soils by well known bioleaching techniques. This study shows the ability and capability of mentioned microorganisms to treat soils contaminated with heavy metals in laboratory conditions, using 100 ml Erlenmeyer flasks, at 35 0C and an agitation speed of 200 rpm with thermostatic Microbiological Incubator with mixing pan Heidolph model Titramax 1000. Experimental researches were conducted on soil samples taken from inside of the precinct Romplumb, Baia Mare. These studies were conducted to determine at the same time and behavior of heavy metals from soils taken in terms of their extraction of these soils, by methods which involve the use of microorganisms. Another purpose of this research is related to determination of the heavy metals solubilization efficiency under conditions designed to optimize the action of microorganisms. The end of the paper is reserved for conclusions and observations resulting from processing and interpretation of results for all tests.