SEASONAL CHANGES IN STRUCTURALLY DOMINANT
BACTERIA OF CLAY MINING SITE AT KERALA
CERAMICS LIMITED IN KERALA, INDIA
V. SALOM GNANA THANGA
Abstract
Clays, the active mineral portion of soils, are colloidal and most clay is crystalline. Clays have
a net negative charge which will attract and hold positively charged ions (cations). The amounts of
these positive cations held by clays vary with the kind of clay. This study pertains to the characteristics
of soil in a clay mining site of Kerala Ceramics Limited (KCL) at Kundara, Kollam district Kerala. Kaolin
or china clay is wide spread and Kaolinite is the dominant mineral fraction. It influences the microbial
activity. The main objective of this work was to attain a knowledge of bacterial diversity in the clay
mining site at KCL. A special emphasis placed on the bacteria because of their multiple roles in
environmental microbiology. For the purpose of this work, samples were collected from three different
sites during premonsoon season (April, 2009) and monsoon season (July, 2009).Various morphological
and biochemical tests were carried out for the identification of structurally dominant bacteria and also
various physico-chemical characters of soil was analyzed. Most of the structurally dominant bacteria
identified from the clay soil were gram negative and are highly acidophilic in nature.
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