Sorption of polycyclic aromatic hydrocarbons to minerals and low-organic-carbon aquifer sediments /
(NOC) to mineral surfaces in low-organic-carbon soils
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1999.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | (NOC) to mineral surfaces in low-organic-carbon soils aggregation on the type and amounts of surfaces all minerals, except kaolinite, was highest when Cs and a low-organic-carbon aquifer sediment. Pyrene was and Cs) promoted pyrene sorption to vermiculite, where and sediments remain unclear. The objectives of this and the possible influence of coatings and particle and untreated samples, suggesting that mineral available for pyrene sorption. cations and mineral surface chemistry on the sorption coefficients of individual minerals weighted by their confirming previous studies where surface area could contribution to the total surface area. The calculated controlling the sorption of nontoxic organic chemicals describe their hardness or softness, some qualitative difference may be caused by specific a-cation bonds different minerals. Results show a significant effect estimates of mineral composition in the sediment exchange capacity of this mineral. Pyrene sorption to formed between the aromatic [] electrons in pyrene found between Kd values and cation properties that including kaolinite, quartz, hematite, vermiculite, isotherms for a11 minerals and sediment were linear. Kd was the same order of magnitude as the measured molecules and exchangeable cations On the mineral not account for differences in Kd values. Pyrene of polycyclic aromatic hydrocarbons (PAH) to minerals, of the saturating cation on pyrene's K4 value. Na- other minerals saturated with the same cations. This pyrene sorption, relationships were evident. Softer cations (e.g., Ba research were to study the influence of exchangeable Results show a strong influence of the mineral type on saturated minerals sorbed more than the Mg-saturated saturated the surface. Equilibrium sorption of pyrene selected as representative PAH. Equilibrium sorption sorption varied over one order of magnitude for the surface. Although no quantitative correlation was surfaces control pyrene sorption. A composite Kd value the effect could be observed due to the higher cation The molecular mechanisms and major geochemical factors ics. to the aquifer sand was the same for peroxide-treated value, which is reasonable given the semi-quantitative values for all the cations tested. Cs- and Be- vermiculite sorbed between 3 and 22 times more than versions. Quartz and vermiculite showed the highest Kd was calculated by addition of the distribution |
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| Item Description: | "Major subject: Geology". Vita. |
| Physical Description: | xi, 117 leaves : illustrations ; 28 cm. Also available online. |
| Bibliography: | Includes bibliographical references (leaves 63-68). |