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EPA 540/F-94/509
GHEA Associates Process
New Jersey Institute of Technology
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GHEA Associates Process
New Jersey Institute of Technology (15K)
ABSTRACT
GHEA Associates Process
New Jersey Institute of Technology
Emerging Technology Bulletin
EPA 540/F-94/509
September 1994
This process applies surfactants and additives to soil washing and waste water
treatment to make organic and metal contaminants soluble. It can be applied
to soil, sludges, sediments, slurries, groundwater, surface water, industrial
effluents, and in situ soil flushing. Heavy metals, and non-volatile and volatile
organic compounds (VOCs) can be treated. The soil is excavated, washed, and
rinsed to produce clean soil. Wash and rinse liquids are treated to separate
surfactants and contaminants from the water; contaminants are then separated
as a concentrate from surfactants by desorption. Desorption simultaneously regenerates
surfactants for reuse. Liquid treatment consists of phase separation, ultrafiltration,
and air flotation. In June 1990, treatability studies were conducted on soils
with high clay content, industrial oily sludges, industrial wastewater effluents,
and contaminated groundwater. Removal efficiencies ranged from 81.2 to 99.9
percent and exceeded 99% for most contaminants, which included VOCs, metals,
polychlorinated biphenyls, and polyaromatic hydrocarbons. In situ soil flushing
tests have shown a 20-fold enhancement of contaminant removal rates.
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Posted February 26, 1999
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