Chromium (Cr) exists in aqueous solution as trivalent (Cr3+) and hexavalent (Cr6+) forms. Cr3+ is an essential trace element while Cr6+ is a dangerous and carcinogenic element …
This work aimed to study the distribution of biphenyl degrading isolates from different soils in Nineveh governorate. Fifty five soil samples were collected from reeds soil, sandy soil …