Environmental Chemistry
Aquatic Ecology
Investigating the ecological effects of biocides on nearshore fishes in the Gulf of Mexico.

Conducting baseline studies to assess the impact of crude oil on seaweeds in the Pacific Ocean.

Documenting changes in species diversity and habitat related to impounding mountain streams.

Investigating organochlorine pesticide risks to the fauna inhabiting a restored estuary.
Representative list of Dr. Marrin's project work
Tracking persistent man-made chemicals to identify the sources of river, aquifer, and coastal water pollution.

Developing biogenic gas analyses (e.g., methane, carbon dioxide) to assess pollutant biodegradation and greenhouse .

Pioneering the use of vapor-phase surveying to detect VOCs (e.g., fuels, solvents, fumigants) in groundwater aquifers.

Designating field and laboratory tests for demonstrating the transport and phase partitioning between ground and surface waters.

Comparing the available options for disposing, monitoring and minimizing wastewater effluents in island, desert, and coastal environments.

Assessing the potential for landfill gas and leachate to impact groundwater underlying active solid waste facilities.

Critiquing the design and performance of groundwater remediation (e.g., vapor extraction, bioaugmentation, chemical oxidation) techniques.

Utilizing natural and anthropogenic tracers to evaluate the extent of submarine discharge from and seawater intrusion into coastal aquifers.

Reducing pollutant loads in urban runoff by emulating the flow dynamics and adsorption characteristics of natural drainages.

Locating sources (including recharge areas) and assessing the quality of mountain spring waters using isotope, ion and biochemical fingerprints.

Estimating the demands of alternative energy sources (e.g., biofuels, solar, wind) on water supplies and their influence on local water quality.

Projecting the effects of geological carbon sequestration on shallow aquifers overlying the storage reservoirs (i.e., geoengineering impacts).