SES-702    SOIL CHEMISTRY                                                3(2-1)

 

Objective and Learning Outcome

 

Principles governing ion exchange, retention, chemical equilibria for precipitation & synthesis and chemical remediation processes in soil are discussed. The students should be able to predict release of ions and fate of chemicals in soil by using models.

 

Course Contents

 

1.            Chemical equilibria in soil, water and solute interactions

2.            Soil solution-solid interaction

 

3.            Mineral dissolution: congruent and incongruent

4.            Neo-formation of minerals in soil

5.            Thermodynamics and applications in soil

6.            Organic matter: composition and fractionation

7.            Surface chemistry of soil matrix

8.            Sorption and desorption models

 

9.            Ion exchange: selectivity coefficients, equivalent fraction concept

9.1Hysteresis in ion exchange

9.2Anion exclusion

9.3Complementation effect

9.4Zeta potential

 

10.        Reactions of metal chelates in soils

 

11.        Chemical behavior of ions / elements in aerated and submerged soils

 

12.        Buffering reactions in soil

13.        Chemical remediation of contaminated soils and water

 

Practical

 

1.            Determination of CEC and base saturation

2.            Developing K vs Ca + Mg activity ratios in laboratory

3.            Determination of phosphorous adsorption isotherm

4.            Comparative fit (data from 3) to Freundlich and Langmuir models

5.            Developing titration curves

 

Recommended Books:

 

1.            Bohn, H.L., B.L. McNeal and G.A.O. Connor. 2001. Soil Chemistry. 3rd Ed. John Wiley & Sons Inc., NY, USA.

 

2.        Essington, M. E. 2004. Soil and Water Chemistry. CRC Press, Boca Raton, FL, USA.

3.            McBride, M. 1994. Environmental Chemistry of soils. 406 pp. ISBN0-19-

 

507011-9. Oxford University Press.

 

4.            Sparks, D.L. 2003. Environmental Soil Chemistry. 2nd Ed. Academic Press, San Diego, CA, USA.

 

5.            Sposito, G. 2008. The Chemistry of Soils. 2nd Ed. Oxford University Press, NY, USA.

 

6.            Sriniwas, P. 2010. Soil Chemistry. Oxford Book Company, New Delhi, India.

 

7.            Tan, K.H. 2009. Environmental Soil Science. 3rd Ed. CRC Press, Greenwatch Georgia, USA.