NSF Award Abstract - #0221880| NSF Award Abstract - #0221880 |
AWSFL008-DS3 |
| NSF Org | BES |
| Latest Amendment Date | August 12, 2002 |
| Award Number | 0221880 |
| Award Instrument | Standard Grant |
| Program Manager |
Patrick L. Brezonik BES DIV OF BIOENGINEERING & ENVIRON SYSTEMS ENG DIRECTORATE FOR ENGINEERING |
| Start Date | September 1, 2002 |
| Expires | August 31, 2004 (Estimated) |
| Expected Total Amount | $77593 (Estimated) |
| Investigator | JoAnn Silverstein joann.silverstein@colorado.edu (Principal Investigator current) |
| Sponsor |
U of Colorado Boulder 3100 Marine Street, Room 481 Boulder, CO 803090572 303/492-6221 |
| NSF Program | 1440 ENVIRONMENTAL ENGINEERING |
| Field Application |
0316000 Trace Contaminants 0313040 Water Pollution |
| Program Reference Code | 1440,1689,9187,9237,EGCH, |
0221880 Silverstein The effects of acid mine drainage on natural biogeochemical nitrogen cycling will be studied with respect to the interaction of microbial nitrogen and iron transformations at the lowered pH found in receiving waters. Competition between ferric iron and nitrate as electron acceptors, use of ferrous iron as electron donor in denitrification, and mobilization of iron and other heavy metals from bacterial reduction will be investigated in acid main drainage impacted streams. Species identification in impacted and unimpacted streams will be made utilizing DNA probes and the FISH technique and microscopic counts will be used to produce quantitative estimates of chemolithotrophic iron oxidizers and heterotrophic acidophiles.
