Lecture8-11(2008) - SURFACE AREA Many physical and most...

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SURFACE AREA Many physical, and most chemical properties of soils are attributed to surface phenomena that take place at the interface between the liquid and the solid phases. These properties are correlated to the specific surface area (a) of the solid phase. Formulae for specific surface area of a particle : a m = A s /M s Total surface area of particles, A s , per unit mass, M s . a v = A s /V s Total surface area of particles, A s , per unit of volume, V s . a b = A s /V t Total surface area of particles, A s , per unit bulk volume, V t . According to Hillel “The specific surface of a soil material is a fundamental and intrinsic property which has been found to correlate with important phenomena such as cation exchange, retention and release of various chemicals (including nutrients and certain potential pollutants of the environment), swelling, retention of water, and such mechanical properties as plasticity, cohesion, and strength.”
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The specific surface area (a) can be measured but it is informative to calculate it. To make this calculation it is estimated from the sizes and shapes of
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This note was uploaded on 08/08/2008 for the course SS 322 taught by Professor Lowery during the Spring '08 term at University of Wisconsin.

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Lecture8-11(2008) - SURFACE AREA Many physical and most...

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