lecture_21 - AIR STRIPPING AND AIR SPARGING REMOVES VOCs...

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LECTURE 21 - CLEANUP TECHNOLOGY AND PLUME CONTROL 20.1 GENERAL CONTAMINANTS CAN BE WIDELY VARIED INCLUDE: INORGANICS, VOCs, LNAPLS, DNAPLS AQUIFER CLEANUP FREQUENTLY INVOLVES: ELIMINATING SOURCE OF CONTAMINATION INITIATING SOME FORM OF PLUME CONTROL (CAPTURE) CLEANUP EFFORT 20.2 HYDRODYNAMIC CONTROLS EXCAVATION DITCHS UPGRADIENT AND DOWN GRADIENT INTERCEPTION RECOVERY DITCHS INDUCING STEEPER HYDRAULIC GRADIENT REVERSING GRADIENT DOWNGRADIENT FACILITATING REMOVAL OF FREE PRODUCT (SKIMMER) EXTRACTION/INJECTION WELL SYSTEM TRAP CONTAMINANT PLUME WITHIN CONE OF DEPRESSION TREAT AND RECIRCULATE (OVERLAPPING WELLS) INCLUSION OF INFILTRATION GALLERY WELL POINT SYSTEM TEMPORARY ARRAYS OF MULTIPLE SHALLOW WELLS
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RAPID, HIGHLY FLEXIBLE LIMITED TO SUCTION LIFT OF APPROXIMATELY 4.5 M 20.3 PHYSICAL CONTAINMENT ABOVE GROUND EARTHWORK BERMS BELOW GROUND SHEET PILES (EXPENSIVE, LEAKAGE PROBLEMS, REACTIVE) SLURRY-TRENCH CUTOFFS (CEMENT BENTONITE INEXPENSIVE) GROUT CURTAINS (CEMENT, RESINS) 20.4 GROUNDWATER CLEANUP
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Unformatted text preview: AIR STRIPPING AND AIR SPARGING REMOVES VOCs CARBON ADSORPTION REMOVES LIQUID AND GAS PHASE VOCs, DISSOLVED ORGANICS, TRACE METALS, AND INORGANIC CHEMICALS CHEMICAL TREATMENT PRECIPITATION - METALS, SULFIDES, HYDROXIDES NEUTRALIZATION - GENERALLY IMPROVES OTHER REACTIONS OXIDATION AND REDUCTION - ORGANIC WASTES, BASE METALS ION EXCHANGE - STRONTIUM, CAESIUM BIOLOGICAL TREATMENT REDUCTION OF HYDROGEN PEROXIDE -> OXYGEN PRODUCTION TOO HIGH -> FOAMING NUTRIENT STIMULATION PHOSPHATE ADDITIVE (PRECIPITATES IRON) IRON ACCELERATES REDUCTION HAZARDOUS IN-SITU METALS MAY BE MOBILIZED ALTERNATIVE CLEANUP TECHNIQUES IN-SITU VITRIFICATION - GLASSIFICATION STABILIZATION AND SOLIDIFICATION -SOIL+FLYASH+PORTLAND CEMENT PHYSICAL REMOVAL - EXCAVATION, TRANSPORT, TREATMENT OR DISPOSAL 20.5 CLEANUP OF THE UNSATURATED ZONE GENERAL SAMPLING ACTIVE GRAB SAMPLING PASSIVE ABSORBENT ACCUMULATOR REMEDIATION VACUUM EXTRACTION...
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This note was uploaded on 07/25/2008 for the course GLG 411 taught by Professor Larson during the Fall '06 term at Michigan State University.

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lecture_21 - AIR STRIPPING AND AIR SPARGING REMOVES VOCs...

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