Grantee Research Project Results

Solubilization of Particulate-Bound Ni(II) and Zn(II)

EPA Grant Number: R828771C012
Subproject: this is subproject number 012 , established and managed by the Center Director under grant R828771
(EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).
Center: Center for the Study of Childhood Asthma in the Urban Environment
Center Director: Hansel, Nadia
Title: Solubilization of Particulate-Bound Ni(II) and Zn(II)
Investigators: Stone, Alan T.
Institution: The Johns Hopkins University
EPA Project Officer: Aja, Hayley
Project Period: October 1, 2001 through September 30, 2007
RFA: Hazardous Substance Research Centers - HSRC (2001) Recipients Lists
Research Category: Hazardous Waste/Remediation , Land and Waste Management

Objective:

Models currently used to manage metal-contaminated sites currently have three principal shortcomings: (1) toxic metal speciation in many instances is under kinetic control rather than thermodynamic control; (2) host solids are often reworked by precipitation/dissolution reactions such that toxic metal ions are “buried” and hence physically inaccessible; and (3) soil organic constituents are difficult to characterize and hence difficult to account for. The objective of this research project is to perform carefully designed laboratory experiments to gain specific, quantitative information about these three phenomena. Our work will focus on the dissolution of NiO(s) and the desorption of Ni(II) and Zn(II) from FeOOH (goethite) and Fe(OH)3 (amorphous) surfaces. We are aided in this research by capillary electrophoresis (CE), which allows us to monitor processes taking place in aqueous solutions, and by high resolution transmission electron microscopy (HRTEM), which allows us to see surface structural changes.

Publications and Presentations:

Publications have been submitted on this subproject: View all 1 publications for this subproject | View all 108 publications for this center

Supplemental Keywords:

nickel, zinc, metal ions, capillary electrophoresis, toxics, exposure, hazardous substances, assessment, cleanup, risk communication, international cooperation, pollutants/toxics, waste, chemicals, ecological risk assessment, environmental chemistry, environmental engineering, hazardous, hazardous waste, zinc, capillary electrophoresis, chemical releases, contaminated waste sites, hazardous waste characterization, hazardous waste disposal, hazardous waste management, hazardous waste treatment, heavy metals,, RFA, Scientific Discipline, INTERNATIONAL COOPERATION, Waste, POLLUTANTS/TOXICS, Environmental Chemistry, Chemicals, Hazardous Waste, Ecological Risk Assessment, Hazardous, Environmental Engineering, hazardous waste disposal, hazardous waste management, hazardous waste treatment, contaminated waste sites, nickel oxide, Zinc, chemical releases, hazardous waste characterization, capillary electrophoresis

Progress and Final Reports:

Main Center Abstract and Reports:

R828771 Center for the Study of Childhood Asthma in the Urban Environment

Subprojects under this Center: (EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).
R828771C001 Co-Contaminant Effects on Risk Assessment and Remediation Activities Involving Urban Sediments and Soils: Phase II
R828771C002 The Fate and Potential Bioavailability of Airborne Urban Contaminants
R828771C003 Geochemistry, Biochemistry, and Surface/Groundwater Interactions for As, Cr, Ni, Zn, and Cd with Applications to Contaminated Waterfronts
R828771C004 Large Eddy Simulation of Dispersion in Urban Areas
R828771C005 Speciation of chromium in environmental media using capillary electrophoresis with multiple wavlength UV/visible detection
R828771C006 Zero-Valent Metal Treatment of Halogenated Vapor-Phase Contaminants in SVE Offgas
R828771C007 The Center for Hazardous Substances in Urban Environments (CHSUE) Outreach Program
R828771C008 New Jersey Institute of Technology Outreach Program for EPA Region II
R828771C009 Urban Environmental Issues: Hartford Technology Transfer and Outreach
R828771C010 University of Maryland Outreach Component
R828771C011 Environmental Assessment and GIS System Development of Brownfield Sites in Baltimore
R828771C012 Solubilization of Particulate-Bound Ni(II) and Zn(II)
R828771C013 Seasonal Controls of Arsenic Transport Across the Groundwater-Surface Water Interface at a Closed Landfill Site
R828771C014 Research Needs in the EPA Regions Covered by the Center for Hazardous Substances in Urban Environments
R828771C015 Transport of Hazardous Substances Between Brownfields and the Surrounding Urban Atmosphere

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