Investigation of the effects of polyelectrolyte coatings on colloid transport in porous media

Technical Report · Fri Jan 01 00:00:00 EST 1993

DOI:https://doi.org/10.2172/6348660· OSTI ID:6348660

Olson, T M

Goal is to study the repulsive interaction forces between humic- coated colloids and negatively charged porous media surfaces. Filtration experiments were carried out on hematite coated with humic acid or NOM, in porous media or packed bed (silica bed). Effects of Ca[sup 2+] are being studied. Results so far indicate that many humic coating properties (molecular size, acidity, polarity, surface conformation) have an important effect on colloid attachment rates but very little effect on colloid electrophoretic mobility; steric repulsive forces are proposed to account for these observations. Some humic coatings are more effective in enhancing colloid transport in quartz beds than in enhancing colloid stability. Other effects are discussed.

• Research Organization: California Univ., Irvine, CA (United States). Dept. of Civil Engineering
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG03-89ER60849
• OSTI ID: 6348660
• Report Number(s): DOE/ER/60849-T1; ON: DE93018300
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COLLOIDS
MOBILITY
HEMATITE
CALCIUM IONS
COATINGS
ELECTROPHORESIS
FILTRATION
HUMIC ACIDS
PACKED BEDS
POROUS MATERIALS
PROGRESS REPORT
QUARTZ
SILICON OXIDES
CHALCOGENIDES
CHARGED PARTICLES
DISPERSIONS
DOCUMENT TYPES
IONS
IRON ORES
MATERIALS
MINERALS
ORES
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SILICON COMPOUNDS
400105* - Separation Procedures