- highly controlled field experiments on fate of methane and ethanol-blended gasolines released into the vadose zone (now complete)
- evaluation of natural source zone depletion (NSZD) at petroleum hydrocarbon release sites with lingering contamination (ongoing)
- full-scale application of sulfate release for enhancement of in situ biodegradation of petroleum hydrocarbons in source zone (ongoing)
Contaminants investigated to date include:
- petroleum hydrocarbons (e.g. gasoline, ethanol-blended gasolines [gasohol], oil, crude oil)
- fuel oxygenates (e.g. in reformulated gasolines)
- ethanol
- chlorinated solvents
- pesticides
- complex mixtures
Topics that we've have addressed via field research in the past include:
- transport, sorption and degradation of various organic contaminants in sandy aquifers
- factors limiting pump & treat remediation of contaminated groundwater
- comparison of pulsed and continuous pumping for groundwater remediation by pump & treat technologies
- pesticide transport and sorption in groundwater
- remediation of groundwater via various configurations of permeable reactive biobarriers
- aerobic PRBs using diffusive oxygen releasers or solid oxygen sources
- anaerobic PRBs using diffusive hydrogen release, zero valent iron, gypsum as sulfate source
- flushing of a high-concentration, multi-component organic/inorganic contaminant plume from a granular aquifer overlying a fractured aquitard
- vulnerability of Mexico City's aquifer to contamination
Douglas M. Mackay
Adjunct Professor, Retired, Department of Land, Air & Water Resources http://lawr.ucdavis.edu/
650-324-2809 office
650-400-3998 mobile
dmmackay@ucdavis.edu