Abstract

The investigators propose to investigate the degree to which volatile organic compounds such as trichloroethylene and vinyl chloride are degraded in unsaturated soil systems amended with gas-phase nutrients required by methanotrophic and ammonia-oxidizing bacteria. The work conditions will be designed to promote the unique cometabolic capabilities of methanotrophs and ammonia oxidizers taking advantage of the relative ease of transporting gas-phase nutrients through the vadose zone. Nutrient amendments to soil columns would take the form of methane and ammonia or alternate gaseous sources of nitrogen. Experiments will be conducted at different scales from microcosms to large lysimeters. A mathematical model will be developed to describe the results and to predict the fate and mass transport in the vadose zone. Operating conditions for the lysimeter studies will be selected on the basis of the model.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Institute of Environmental Health Sciences (NIEHS)
Type
Hazardous Substances Basic Research Grants Program (NIEHS) (P42)
Project #
5P42ES004940-09S2
Application #
2851228
Study Section
Project Start
Project End
Budget Start
1997-10-01
Budget End
1998-09-30
Support Year
9
Fiscal Year
1998
Total Cost
Indirect Cost

  Institution

Name
University of Arizona
Department
Type
DUNS #
City
Tucson
State
AZ
Country
United States
Zip Code
85721

  Publications

Pu, Mengjie; Guan, Zeyu; Ma, Yongwen et al. (2018) Synthesis of iron-based metal-organic framework MIL-53 as an efficient catalyst to activate persulfate for the degradation of Orange G in aqueous solution. Appl Catal A Gen 549:82-92
Brusseau, Mark L; Guo, Zhilin (2018) The integrated contaminant elution and tracer test toolkit, ICET3, for improved characterization of mass transfer, attenuation, and mass removal. J Contam Hydrol 208:17-26
Valentín-Vargas, Alexis; Neilson, Julia W; Root, Robert A et al. (2018) Treatment impacts on temporal microbial community dynamics during phytostabilization of acid-generating mine tailings in semiarid regions. Sci Total Environ 618:357-368
Brusseau, Mark L (2018) Assessing the potential contributions of additional retention processes to PFAS retardation in the subsurface. Sci Total Environ 613-614:176-185
Delikhoon, Mahdieh; Fazlzadeh, Mehdi; Sorooshian, Armin et al. (2018) Characteristics and health effects of formaldehyde and acetaldehyde in an urban area in Iran. Environ Pollut 242:938-951
Hammond, Corin M; Root, Robert A; Maier, Raina M et al. (2018) Mechanisms of Arsenic Sequestration by Prosopis juliflora during the Phytostabilization of Metalliferous Mine Tailings. Environ Sci Technol 52:1156-1164
Yan, Ni; Zhong, Hua; Brusseau, Mark L (2018) The natural activation ability of subsurface media to promote in-situ chemical oxidation of 1,4-dioxane. Water Res 149:386-393
Madeira, Camila L; Field, Jim A; Simonich, Michael T et al. (2018) Ecotoxicity of the insensitive munitions compound 3-nitro-1,2,4-triazol-5-one (NTO) and its reduced metabolite 3-amino-1,2,4-triazol-5-one (ATO). J Hazard Mater 343:340-346
Liu, Pengfei; Rojo de la Vega, Montserrat; Sammani, Saad et al. (2018) RPA1 binding to NRF2 switches ARE-dependent transcriptional activation to ARE-NRE-dependent repression. Proc Natl Acad Sci U S A 115:E10352-E10361
Thomas, Andrew N; Root, Robert A; Lantz, R Clark et al. (2018) Oxidative weathering decreases bioaccessibility of toxic metal(loid)s in PM10 emissions from sulfide mine tailings. Geohealth 2:118-138

Showing the most recent 10 out of 497 publications