Pan American Advanced Studies Institute

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Pan American Advanced Studies Institute

• Sponsors
• National Science Foundation
• US Department of Energy
• Directors
• Danny Reible, Louisiana State University
• Roberto Carvalho, PUC

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Logistics

• Computer Rooms
• Basement of this building, Rm DE
• Name tags allow access
• For travelers to the PASI
• Reimbursement for travel and food currently being
  arranged
• Expect to be complete by the end of the week
• Provide Robin arrival and departure dates
• US participants see Robin for information and
  to sign expense forms
• Restrooms at end of hall on this floor
• S Female and H Male

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Logistics (continued)

• Normal Schedule
• 9 AM Start
• Busses will leave hotels promptly at 830 AM!
• Breaks
• 1000-1030 and 330
• 1200-100 Lunch Break
• 5 PM End
• Busses will leave shortly thereafter
• Reception 5-8 PM TODAY
• Reception at Rio Rioss Hotel on Friday

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Purpose

• Provide an opportunity for high level scientific
  exchange between North and South American
  Countries
• Approximately 15 lecturers from North and South
  America
• 25 participants from the US
• 10 participants from Mexico
• 35 participants from South America

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Subject

• In situ assessment and remediation of
  contaminated sites
• Easy contaminated site problems have been solved
• What remains are difficult
• Large in volume
• Mixed with other contaminants or diluents
• Inadequate resources to resolve
• Places a premium on effective low cost options
  such as in situ approaches

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Goals and Objectives

• Identify contaminated site problems we have in
  common
• Identify low cost effective solutions
• What are they and how do we use them?
• Develop a recognition and understanding of these
  options and their limitations among a cadre of
  early career professionals that can advance these
  approaches in their own countries.

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Approach

• A series of informal, interactive lectures on
  subjects relevant to the processes and
  technologies of in situ assessment and
  remediation
• What you achieve is proportional to the effort
  that you put in
• Interact with other participants and lectures
• Ask questions
• Participate in Discussions

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Topics

• Chemical Dynamics in the Environment (July 23)
• Thermodynamic Models and Property Estimation
• Chemodynamics
• On-Site Assessment (July 24)
• Innovative on-site analytical technologies
• Organic Processes in Soils and Groundwaters (July
  25)
• Aqueous phase processes
• Nonaqueous phase processes including dissolution
• Poster Session I (Thursday, July 25)

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Topics (continued)

• Processes and Remediation of Inorganic (Metal)
  Subsurface Contaminants (July 26)
• Poster Session II (Friday, July 26)
• Processes and Remediation of Sediments (July 27)
• Assessment and Remediation of Contaminated
  Sediments
• Sediment Remediation Case Studies
• Free Day (July 27)

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Topics (continued)

• Natural Attenuation (July 29)
• Bioremediation (July 30, 31)
• BTEX and Petroleum Hydrocarbons
• Chlorinated Solvents
• Phytoremediation (August 1, 2)
• PAHs
• Chlorinated Organics
• TNT and Explosives
• Exudates
• Metals

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Perspectives on Site Cleanup in the United States

• Danny Reible
• Chevron Professor of Chemical Engineering
• Director, Hazardous Substance Research
  Center/SSW
• Louisiana State University

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Summary and Objectives

• Summarize range of contaminants and technologies
  employed in the United States
• Focus on Superfund abandoned sites
• Focus on innovative technologies
• Identify trends in technology usage based upon
  historical record
• Based on annual technology review published by US
  EPA/Technology Innovation Office
• 10th Edition (2000) considered 934 treatment
  projects of which 834 were under Superfund

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Categories of Remedies

• Source control- containment
• Barriers, caps, liners, disposal in landfills
• Source control- treatment
• Extraction, bioremediation
• Groundwater remediation
• Extraction and treatment, bioremediation
• Exposure control options
• Institutional controls, relocation

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Contaminants Addressed (1982-1999)
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Soil/Solids Treatment Technologies

• On- and off-site incineration
• Solidification/stabilization
• Soil vapor extraction
• Thermal desorption
• Bioremediation

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Groundwater Technologies

• Vertical Engineered Barriers
• Air sparging
• Bioremediation
• Dual phase extraction
• Permeable reactive barriers
• Phytoremediation
• Natural attenuation

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Site Remedies
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In Situ vs. Ex Situ
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In-Situ Treatment- Source Control
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Innovative Technology Usage
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Applications of Bioremediation
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Bioremediated Contaminants (1982-1999)
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Monitored Natural Attenuation for Groundwater
Treatment
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Trend in Natural Attenuation
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Summary on Source Treatment

• More than half of source control treatments are
  ex situ
• More than 2/3 of contaminated soil volume being
  treated in situ
• Soil vacuum extraction is most commonly used
  source control treatment technology (26)

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Trends in Remedies

• In situ remedies preferred for large volume sites
  and growing in usage
• Growing use of innovative technologies including
  in-situ bioremediation and phytoremediation
• Growing use of natural attenuation for site remedy