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  • A kinetic approach for the determination of sorption rate constants using a column-type reactor

    Creator:
    Patrier, Lionel
    Abstract:
    A Langmuir sorption model incorporating a second step of irreversible absorption was applied to a model soil system. The column was packed with cellulose triacetate; pulse and step input tests with 3,4-dichlorophenol were performed; the effluent concentration was measured by electron capture detector gas chromatography and sorption rate constants were...
    Resource Type:
    Masters Thesis
    Full Text:
    of reactions including ion exchange, physical adsorption, chemisorption and absorption occurring at

  • Adsorption of Cu(II) and Cd(II) by Na-montmorillonite at low surface coverage in the presence and absence of water soluble complexing organic ligands

    Creator:
    Inskeep, William Parks
    Abstract:
    The formation of solution and solid complexes with heavy metals will partially determine their mobility and plant availability in soil systems. Experiments were initiated to determine the effect of pH, adsorbent and initial metal concentrations, and the presence of water soluble ligands on the adsorption of Cd and Cu by...
    Resource Type:
    Masters Thesis
    Full Text:
    ), Chicago sludge (CSE), and an agricultural peat soil (PE). 47 Appendix B 71 ADSORPTION OF Cu(II) AND Cd

  • Fluoride sorption and dissolution reactions in soils

    Creator:
    Peek, Daniel C.
    Abstract:
    The reaction of F, often a component of industrial wastes and phosphatic fertilizers, with soil was studied with regard to sorption reactions and resultant changes in solution composition. Sodium fluoride solutions (0.0 to 2.5 mmol/L F) were equilibrated with ten soils for 24h. The soil extract solutions were analyzed for...
    Resource Type:
    Masters Thesis
    Full Text:
    determined by atomic absorption after extraction from soil with 0.2 mol/L ammonium oxalate (pH 3.5), and

  • Relationship between pore size, particle size, aggregate size and water characteristics

    Creator:
    Wu, Laosheng
    Abstract:
    Soil pore size distribution and water characteristics are important for water storage, water movement, and soil-plant interaction studies. Laboratory determinations of water characteristics and pore size distribution are time consuming and costly. Investigators have proposed many models to predict them from routinely available data. Most of the models are related...
    Resource Type:
    Masters Thesis
    Full Text:
    China and the Department of Soil Science at Oregon State University for their financial support during

  • Stability of soil structure for water movement in an aridisol

    Creator:
    Ali, Safdar
    Abstract:
    Lack of stability of soil aggregates for water movement is a major problem in arid soils due to low organic matter and higher sodium contents. Soil amendments for improving stability of structure and increasing infiltration of water are essential to solve water management problems in these areas. Different rates of...
    Resource Type:
    Masters Thesis
    Full Text:
    movement is a major problem in arid soils due to low organic matter and higher sodium contents. Soil

  • Adsorption of hexavalent and trivalent chromium to a clayey silt soil : batch kinetic and equilibrium studies

    Creator:
    Bean, Gregory R.
    Abstract:
    Chromium, an element of widespread use, is toxic in some forms. Improper disposal of waste chromium products has resulted in contamination of many sites throughout the United States, including the United Chrome Products Superfund site in Corvallis, Oregon. A better understanding of chromium chemistry is needed to facilitate the remediation...
    Resource Type:
    Masters Thesis
    Full Text:
    : Adsorption of Hexavalent and Trivalent Chromium to a Clayey Silt Soil: Batch Kinetic and Equilibrium Studies

  • Surface complexation of protons and sulfate by kaolinite

    Creator:
    Wildensee, Frank
    Abstract:
    The emission of sulfur oxides from anthropogenic sources represents a potential threat to terrestrial ecosystems. Sulfate, the most highly oxidized form of sulfur, is the most common form of inorganic sulfur in most soil environments. The sorption of sulfate may influence the alkalinity of the soil solution and as a...
    Resource Type:
    Masters Thesis
    Full Text:
    . Soil Sci. Soc. Am. J. 41:686-691. Aylmore, L. A., M. Karim, and J. P. Quirk. 1967. Adsorption and

  • Chromium (VI) sorption in soils : chemical behavior and solute transport modeling

    Creator:
    Schroth, Martin Herbert
    Abstract:
    Chromium spills on soils are causing severe groundwater contamination problems. To increase the performance of cleanup methods, the chemical behavior of chromium in soils and its transport through soils have to be understood. The objectives of this research were to investigate the sorption characteristics of chromium(VI) in soil and to...
    Resource Type:
    Masters Thesis
    Full Text:
    Cr(III) and subsequent removal, besides Cr(VI) adsorption, was a major process in soil suspensions