The Diffusion and Sorption of Hydrophobic Organic Chemicals in Consolidated Sediments and Saturated Soils PDF Download
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Author: Geoffrey F. Deane
Publisher:
ISBN:
Category :
Languages : en
Pages : 294
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Book Description
Author: Geoffrey F. Deane
Publisher:
ISBN:
Category :
Languages : en
Pages : 294
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Book Description
Author: Wilbert Lick
Publisher: CRC Press
ISBN: 1420059882
Category : Science
Languages : en
Pages : 416
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Book Description
Contaminated bottom sediments and their negative impacts on water quality are a major problem in surface waters throughout the United States as well as in many other parts of the world. Even after elimination of the primary contaminant sources, these bottom sediments will be a main source of contaminants for many years to come. In order to determin
Author: John J. Hassett
Publisher:
ISBN:
Category : Adsorption
Languages : en
Pages : 148
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Author: Palakurth Suresh Chandra Rao
Publisher:
ISBN:
Category : Hazardous wastes
Languages : en
Pages : 20
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Author: Mohammed Mokhlesur Rahman
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Daniel M. Linn
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 292
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Book Description
Reports the current thinking on the role that adsorption may play in the rate and extent of an organic compound's degradation in the soil. Among the topics of the 14 papers are diazinon degradation and dissipation in the root zone, the reductive dechlorination of hexachlorobenzene in wetland soils, and the utility of sorption and degradation parameters from the literature for site-specific pesticide impact assessments. Proceedings from an October 1991 symposium in Denver. No index. Annotation copyright by Book News, Inc., Portland, OR
Author: Teresa Birnbaum Culver
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 310
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Book Description
Author: Munjed A. Maraqa
Publisher:
ISBN:
Category : Organic compounds
Languages : en
Pages : 340
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Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 636
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Author: Isabel Rute Faria
Publisher:
ISBN: 9781109661750
Category :
Languages : en
Pages :
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This dissertation focuses on competitive effects between co-occuring contaminants in soil, in particular how chemical properties of competitors affect competition and on the effect of competition induced desorption on risk based soil clean-up standards. Single solute sorption isotherm data were determined in three distinct sorbents for a set of organic compounds with varying physical-chemical properties. Additionally some of the most recent Linear Free Energy Relationship (LFER) models were tested for their ability to fit or predict sorption. Although the LFERs tested provided very good estimates of sorption they cannot currently be applied to different sorbents using the same fitting parameters. Additional effort is still required in the estimation of sorption to soil organic matter. Binary systems consisting of 1,2-dichlorobenzene (12DCB) + competitor were investigated over a range of concentrations of competitor in three natural sorbents with distinct characteristics. Two models, the ideal adsorbed solution theory (IAST) and the Potential theory (Polanyi based multi-solute model), widely used in the prediction of multi-solute sorption equilibrium from single solute data were used to simulate competitive sorption. The effect of competitor structure on the degree of competition was also investigated to identify any relationships between competitive effect and competitor structure using molecular descriptors. On average the IAST model provided lower errors than the Potential model. Taking into consideration that both models rely solely on single solute data to predict multi-solute data both models can be considered satisfactory. Competitor volume seemed to have an effect on the degree of competition observed, most likely due to the rigid nature of the competitive hard carbon domain which may prevent larger molecules from reaching the same pores in which the primary contaminant is located. The effect of the presence of a competitor on the transport and release to groundwater of a low concentration of sorbed chemical (mimicking the residual amount of chemical left in soil after clean-up) was modeled combining water infiltration and chemical fate and transport components. The results confirm that the presence of a competitor can significantly increase the mobility and release of a primary contaminant in certain soil/solute combinations. All competitors simulated affected both the speed of movement and the maximum effluent concentration of the primary contaminant.
