Removal of heavy metals from aqueous solutions by soils

Miscellaneous · Sun Jan 01 00:00:00 EST 1989

OSTI ID:6749759

Mohamed, F

Trace metal transport from terrestrial to aquatic ecosystems including groundwater is strongly mediated by soil chemical interactions. Due to their specific properties (nonexchange adsorption, ion exchange capacity, biological activity) soil and soil materials, such as clay minerals, could play a significant role in removing many of the pollutants present in waste water. Many methods have been used in treating industrial waste water polluted with heavy metals. One method of treatment which is of particular interest for this research is the method of ion exchange. The sorption of heavy metals by the soil or soil components can be influenced by soil pH. Other parameters such as metal concentration, cation exchange capacity (CEC), and type of soil, can influence the behavior of heavy metals. The phenomena of heavy metal sorption (such as Cd, Co, Cr, Cu, Pb, Ni, and Zn) by soil and clay minerals from aqueous solutions was investigated. Experiments were performed using soil from the University of Texas at Dallas campus, montmorillonite clay, bentonite clay, and sand, as well as lining martials from two dump sites, one a hazardous waste site, and the other a municipal solid-waste site. Experiments were conducted to establish the equilibrium contact time. Another experiment was performed to study the leachate of heavy metals through soil columns. Parameters such as soil dosage, metal solution pH, and the effect of the presence of more than one metal were investigated. This research covers the following areas: the identification of alternatives for more elective and economical ways to treat municipal and industrial waste water, the study of mobility patterns of valently different heavy metals as a function of pH in different kinds of soil components, and the evaluation of the use of clay minerals as liners for waste disposal sites.

• Research Organization: Texas Univ., Dallas, TX (USA)
• OSTI ID: 6749759
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CADMIUM
REMOVAL
CHROMIUM
COBALT
COPPER
LEAD
NICKEL
ZINC
AQUEOUS SOLUTIONS
CLAYS
ENVIRONMENTAL TRANSPORT
ION EXCHANGE
LEACHATES
SOIL-STRUCTURE INTERACTIONS
SOILS
SORPTION
WASTE PROCESSING
WASTE WATER
WATER POLLUTION
DISPERSIONS
ELEMENTS
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
MASS TRANSFER
METALS
MIXTURES
OXYGEN COMPOUNDS
POLLUTION
PROCESSING
SOLUTIONS
TRANSITION ELEMENTS
WASTE MANAGEMENT
WASTES
WATER
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
540220 - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)