By Professor Brian Berkowitz, Dr. Ishai Dror, Professor Bruno Yaron (auth.)

ISBN-10: 3540743812

ISBN-13: 9783540743811

ISBN-10: 3540743820

ISBN-13: 9783540743828

This publication combines earth technology, subsurface hydrology and environmental geochemistry, delivering a accomplished historical past for experts drawn to the safety and sustainable administration of the subsurface setting. The reader is brought to the chemistry of contaminants, which generally disturb the typical equilibrium within the subsurface due to human job. the foremost concentration of the publication is on contaminant reactions in soil strategies, groundwater and porous media good levels, accounting for his or her patience and transformation within the subsurface, as they're transported from the land floor into groundwater. Discussions on chosen case reviews are supplied.

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Extra info for Contaminant Geochemistry: Interactions and Transport in the Subsurface Environment

Sample text

3 shows the rate-limiting steps in mineral dissolution consisting of (a) transport of solute away from the dissolved crystal or transport-controlled kinetics, (b) surface reaction-controlled kinetics where ions or molecules are detached from the crystal surface, and (c) a combination of transport and surface reaction-controlled kinetics. Based on the results of Berner (1978, 1983), Sparks (1988) showed that, in transport-controlled kinetics, the dissolution ions are detached very rapidly and accumulate to form a saturated solution adjacent to the surface.

12) = µ*i + RT ln( xi γ *i ). The standard state chemical potential, µi* = µi0 + RT lnγi∞, has the advantage that it can be measured experimentally. In the molality concentration scale, the molality mi of solute i is the amount of solute i per kg of solvent. 14) mi = xi = ions ions where n is the number of moles and Mw is the molecular mass of water (kg/mol). 15) where the term m0 = 1 mol/kg has been included to make the expression dimensionless. The standard state chemical potential is µi᭞ = µi0 + RT lnMwm0γi∞ when the molality concentration scale is used.

Thus, when calculating the chemical potential of species i, a term that takes into account the deviation from ideal conditions is added. This term is called an excess term and can be either positive or negative. The term usually is written as RT lnγi, where γi is the activity coefficient of component i. The complete expression for the chemical potential of species i then becomes µ i = µ i0 ( P, T ) + RT ln xi + RT ln γ i = µ i0 ( P, T ) + RT ln( xi γ i ). 10) As mentioned previously, in this expression, µi0(P, T) is the chemical potential of a pure species i.

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Contaminant Geochemistry: Interactions and Transport in the Subsurface Environment by Professor Brian Berkowitz, Dr. Ishai Dror, Professor Bruno Yaron (auth.)


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