Seepage control in contaminated and permeable Houston clay: A laboratory study

Journal Article · · Hazardous Waste and Hazardous Materials; (United States)

OSTI ID:5641485

Vipulandan, C ^[1]; Leung, M ^[2]

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1. Univ. of Houston, TX (United States)
2. Stone and Webster Environmental Services, Houston, TX (United States)

Local soils are being used as barriers and covers in hazardous waste disposal waste disposal sites and hence better understanding of their performance and treatability under hazardous environment is of interest. Also controlling seepage through contaminated and permeable soils is of major concern. In this study the behavior of a field clay (obtained from Houston, Texas) and a clay-sand mixture were evaluated when permeated and contaminated with methanol. Interaction between methanol clay was studied using sedimentation analysis and index tests. The potential of using bentonite clay as an additive in the clay-sand mixture to reduce the hydraulic conductivity was also studied. Remolded field clays and clay-sand mixture with and without methanol contamination were treated to reduce their hydraulic conductivity by permeating very dilute grout solutions. The concentration of sodium silicate in the grout solution was 8%, while the solid content in the cement and lime grouts was 0.3%. The hydraulic conductivity of soils and the charges due to treatment are discussed in terms of the plasticity index and sedimentation of soil in respective permeants. The hydraulic conductivity of a Houston clay and clay-sand mixture (hydraulic conductivity > 10{sup {minus}4} cm/s) could be reduced to less than 10{sup {minus}7} cm/s (US EPA limit for soil barriers) by permeating with selected grout solutions or with bentonite clay additive.

• OSTI ID: 5641485
• Journal Information: Hazardous Waste and Hazardous Materials; (United States), Vol. 8:1; ISSN 0882-5696
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
HAZARDOUS MATERIALS
LAND POLLUTION CONTROL
SOILS
PERMEABILITY
BENCH-SCALE EXPERIMENTS
BENTONITE
CLAYS
GROUND DISPOSAL
GROUTING
HYDRAULIC CONDUCTIVITY
LEACHING
METHANOL
PARAMETRIC ANALYSIS
SAND
ALCOHOLS
CONTROL
DISSOLUTION
HYDROXY COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MANAGEMENT
MATERIALS
ORGANIC COMPOUNDS
POLLUTION CONTROL
SEPARATION PROCESSES
WASTE DISPOSAL
WASTE MANAGEMENT
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management