Rajasekar, R. and Sumathi, R. and Gnanasekaran, K.S.A. (1987) Influence of prolonged submergence on the electrochemical properties of karaikudi red soil of lateritic origin. Bulletin of Electrochemistry , 3 (3). pp. 275-277. ISSN 0256-1654

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Abstract

Karaikudi red soil of lateritic origin was subjected to prolonged submergence under laboratory conditions. The changes in its electrical resistance, pH and soil redox potential were monitored over a period of 60 days. From the initial value of 340 mV, the E, fell to -360 mV and remained thereafter al'most steady. At a steady pH of 6.9 the most probable soil redox equilibrium that controls the E, value at this level could be the Fe+++lFeti system. The fall in pH was from 7.5 to 6.9 only, probably owing to the presence of low organic carbon content. The bulk resistance decreased from 300 to 150 ohms due to the release of ions into the soil solution. Another soil sample was kept under submergence in a glass container for a period of 41 days. The soil solution collected during this period was analysed for Na, K, Ca, Zn, Mn and Fe using AAS. The concentrations of almost all the ions increased with time. The release of iron took almost two days. The E, values have been correlated with the increasing concentration of Mn and Fe over this period. The rising concentration curves of Mn and Fe are exponential in nature.

Item Type:	Article
Uncontrolled Keywords:	Lateritic soil; variations in SRP; ph and electrical resistance; effect of submergence
Subjects:	Biocorrosion
Divisions:	UNSPECIFIED
Depositing User:	ttbdar CECRI
Date Deposited:	23 Mar 2012 12:36
Last Modified:	23 Mar 2012 12:36
URI:	http://cecri.csircentral.net/id/eprint/2271

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