Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 1 of 1
Full-Text Articles in Civil Engineering
Metal Plaque On Reeds From An Acid Mine Drainage Site, Lin Guo, Teresa Cutright
Metal Plaque On Reeds From An Acid Mine Drainage Site, Lin Guo, Teresa Cutright
Teresa J. Cutright
Studies were conducted to investigate the interactions among rhizosphere microorganisms, plaque formation, and metal accumulation in reeds [Phragmites australis (Cav.) Trin. ex Steud.] grown in an acid mine drainage–contaminated field. We found that Fe(II)-oxidizing bacteria (Fe(II)OB] played a key role in Fe plaque formation and pH decrease. The kinetics of Fe plaque formation were related to the abundance of rhizosphere Fe(II)OB, which mediated 66.0 to 93.3% Fe(II) oxidation. The Fe(II) concentration decreased from 14.24 to 0.94 mg L−1 in nonsterile samples, with the most abundant Fe(II)OB activity (5.64 ± 3.83 × 105 colony-forming units g−1) after 2 d, and pH …