The US EPA supports the adoption of green remediation, which considers all environmental effects and incorporates strategies to maximize the net environmental benefit. Our long-term goal is to develop a green remediation based on conversion of solar energy into iron electrolysis in groundwater. Electrolysis of sacrificial iron anodes will cause chemical reduction of contaminants, including chlorinated solvents in groundwater. The kinetics of iron redox in a two-electrode electrolysis system and release of ferrous ions and hydrogen gas can be optimized by controlling the electric current density and polarity for effective transformation of contaminants. The process is suited for karstic groundwater aquifers because the dynamic flow conditions in channels and fractures require controlled rates of iron reactivity. The process will use solar energy and will not produce adverse effects on groundwater environment. The project will evaluate the effect of iron electrolysis on groundwater geochemistry, demonstrate the transformation of trichloroethylene (TCE) as a model nonpolar organic contaminant in groundwater by iron electrolysis under batch and flow conditions, evaluate the effects of polarity reversal and voltage/current intensity, develop a predictive tool "model" for transformation, evaluate the effects on the physical properties of the aquifer, assess the cytotoxicity of treated water, and evaluate any adverse effects on the fate of other contaminants (e.g., semipolar organics such as phthalates). The project will conduct experiments in cells using karst aquifer characteristics, including experimental setups that are constructed of limestone blocks. The plan includes 2D lab pilot-scale testing using the GeoBed (developed in Project 4) and a small-scale field test. The primary experimental variables that will be controlled are the water flow rate, electric current/voltage and electrolyte type. The primary dependent variables that will be monitored are pH, ORP, Dissolved Oxygen, alkalinity, cation and anion concentrations, contaminant concentration, ferrous and ferric ion concentrations, precipitates, electrical conductivity, and voltage/current. A model that couples Faraday's law for iron electrolysis and reactive flow will be developed and verified. The project will assess power requirement and engineer a strategy that utilizes solar panels for field implementation.

Public Health Relevance

EPA supports adoption of green remediation. The project is relevant to the EPA's strategic plan for compliance and environmental stewardship, which strives for cleanup programs that use natural resources and energy efficiently, reduce negative impacts on the environment, minimize pollution at its source, and reduce waste to the greatest extent possible. The target contaminant, TCE, is one of the frequently encountered contaminants at Superfund sites.

National Institute of Health (NIH)
National Institute of Environmental Health Sciences (NIEHS)
Hazardous Substances Basic Research Grants Program (NIEHS) (P42)
Project #
Application #
Study Section
Special Emphasis Panel (ZES1-LWJ-M)
Project Start
Project End
Budget Start
Budget End
Support Year
Fiscal Year
Total Cost
Indirect Cost
Northeastern University
United States
Zip Code
Watkins, Deborah J; Ferguson, Kelly K; Anzalota Del Toro, Liza V et al. (2015) Associations between urinary phenol and paraben concentrations and markers of oxidative stress and inflammation among pregnant women in Puerto Rico. Int J Hyg Environ Health 218:212-9
Yu, Xue; Ghasemizadeh, Reza; Padilla, Ingrid et al. (2015) Spatiotemporal changes of CVOC concentrations in karst aquifers: analysis of three decades of data from Puerto Rico. Sci Total Environ 511:10-Jan
Ferguson, Kelly K; McElrath, Thomas F; Chen, Yin-Hsiu et al. (2015) Repeated measures of urinary oxidative stress biomarkers during pregnancy and preterm birth. Am J Obstet Gynecol 212:208.e1-8
Boldenow, Erica; Hogan, Kelly A; Chames, Mark C et al. (2015) Role of cytokine signaling in group B Streptococcus-stimulated expression of human beta defensin-2 in human extraplacental membranes. Am J Reprod Immunol 73:263-72
Rajic, Ljiljana; Fallahpour, Noushin; Yuan, Songhu et al. (2014) Electrochemical transformation of trichloroethylene in aqueous solution by electrode polarity reversal. Water Res 67:267-75
Ferguson, Kelly K; Cantonwine, David E; Rivera-González, Luis O et al. (2014) Urinary phthalate metabolite associations with biomarkers of inflammation and oxidative stress across pregnancy in Puerto Rico. Environ Sci Technol 48:7018-25
Ferguson, Kelly K; McElrath, Thomas F; Ko, Yi-An et al. (2014) Variability in urinary phthalate metabolite levels across pregnancy and sensitive windows of exposure for the risk of preterm birth. Environ Int 70:118-24
Korir, Michelle L; Knupp, David; LeMerise, Kathryn et al. (2014) Association and virulence gene expression vary among serotype III group B streptococcus isolates following exposure to decidual and lung epithelial cells. Infect Immun 82:4587-95
Yao, Yuanyuan; Wang, Poguang; Giese, Roger (2014) Evaporative derivatization of phenols with 2-sulfobenzoic anhydride for detection by matrix-assisted laser desorption/ionization mass spectrometry. Rapid Commun Mass Spectrom 28:653-61
Fortenberry, Gamola Z; Meeker, John D; Sánchez, Brisa N et al. (2014) Paraoxonase I polymorphisms and attention/hyperactivity in school-age children from Mexico City, Mexico. Environ Res 132:342-9

Showing the most recent 10 out of 56 publications