Download Chemical Fate and Transport in the Environment by Harold F. Hemond PDF

By Harold F. Hemond

Chemical destiny and shipping within the Environment is a textbook for higher department undergraduate and graduate scholars learning environmental sciences in engineering, hydrology, chemistry, and different comparable disciplines. It covers the elemental rules of mass delivery and chemical partitioning, and the transformation of drugs in floor water, in groundwater or subsurface environments, and within the surroundings. 3 significant areas-surface water, floor water, and air-are lined, with descriptive overviews for every quarter. each one significant part starts by way of describing surroundings: its controlling actual, chemical, and organic approaches. The e-book additionally comprises examples of universal environmental difficulties and contains challenge units on the finish of every bankruptcy.

Text that has been built from a path taught at MIT
Broad-based insurance of the environmental sciences
A extra rigorous therapy of delivery than present in different texts
workout units on the finish of every chapter
Examples of present environmental difficulties absolutely built-in into the text
considerable references for entry to the first literature
various illustrations all through

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Extra resources for Chemical Fate and Transport in the Environment

Example text

The pattern of water a Wind velocity (V) FIGURE 2-6 Wind-driven currents in a lake, (a) Circulation in a small lake of simple geometry. The surface water current, or wind drift, averages 2 - 3 % of wind velocity. , 1958).

Although applied here to rivers and streams, they can be used to describe transport and evaluate Fickian mixing coefficients in many environmental situations, including groundwater and air. EXAMPLE 2-1 The t2 profile of Fig. 2-4 was measured 5 hr. after a pulse injection of dye. What is the average river velocity if the maximum concentration is occurring 1025 m down the river from the pulse injection at this time? Estimate the longitudinal dispersion coefficient for this river if σ is approximately 350 m when the chemical has traveled a distance of 1975 m to L 3 .

Note that K ow values are for 25°C. Values from Budavari (1989). 30, respectively. 'Estimated from values in Anderson and Parker (1990). n i e d e r e r (1990). ^Schwarzenbach et al. (1993). Solubility, vapor pressure, and Henry's Law constants are for 25°C. Howard (1990). Vapor pressure for ds-l,2-dichloroethene is for 35°C. Solubility and vapor pressure for frans-l,2-dichloroethene are for 25°C. Vapor pressure for ethanol is for 25°C. 83 Naphthalene Nitrogen M-Octane Oxygen Pentachlorophenol H-Pentane Perchloroethene 38 1 Basic Concepts Vapor pressure, another chemical-specific property, is the partial pres­ sure of a chemical in a gas phase that is in equilibrium with the pure liquid or solid chemical.

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