Organic cosolvent effects on sorption equilibrium of hydrophobic organic chemicals by organoclays
Article Abstract:
An analysis of the sorption equilibrium of naphthalene and diuron by four organoclays revealed that trimethylphenylammonium-clay had the greatest sorptive capacity for naphthalene, while benzyldimethyltetradecylammonium-clay was the most effective sorbent for diuron. A relationship was found between the sorption mechanism for each sorbate-sorbent combination and the arrangement of the quaternary ammonium cations in the exchanged cay and the volume fraction of methanol in solution. Solute-solvent and solvent-sorbent interactions as well as solute-organoclay interactions affected the sorption of naphthalene and diuron by organoclays from aqueous and mixed solvents.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Sorption of dissolved organic carbon by hydrous aluminum and iron oxides occurring at the confluence of Deer Creek with the Snake River, Summit County, Colorado
Article Abstract:
Research on dissolved organic carbon (DOC) sorption by hydrous iron and aluminum oxides was conducted on water samples collected from the acidic, metal-enriched area where Deer Creek joins the Snake River in Colorado. The concentration of DOC was approximately twice as high in Deer Creek than in the upstream portion of the Snake River. The results indicated that hydrous metal oxide sorption of DOC can affect the movement and chemical characteristics of organic carbon in steams with high oxide levels.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1992
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Reactive solute transport in an acidic stream: experimental pH increase and simulation of controls on pH, aluminum, and iron
Article Abstract:
The influence of pH, aluminum and iron in the transport of metals in acid mine waters was investigated in a reactive solute transport model. Simulations of the physical and chemical processes involved during solute transport revealed that changes in pH affects the behavior aluminum and iron transport in an acidic stream. The dynamics of metal transport processes are presented and discussed.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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