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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/6117
Title: Laboratory experiments on river-estuary geonanomaterials
Authors: Viswanathan M.
Chakrapani G.J.
Published in: Current Science
Abstract: Estuaries represent the mixing or transition zone between fresh water (rivers) and saline water (sea) and form very complex systems, which play an important role in the biogeochemical cycles of elements. In order to understand the processes that occur in this environment, laboratory experiments were carried out by mixing river water and seawater, and the resultant floccules or aggregates were studied. It was observed that colloidal flocculation took place, followed by restabilization of colloids until a steady state was obtained. This behaviour was reflected by the electrical conductivity (or dissolved components). The scanning electron microscope photomicrographs show the presence of flocculated clumps and particles less than 0.1 ?m in size. The electron probe micro-analyser analysis of the mixed water floccules show them to be enriched in Fe2O3 and MnO as compared to the river suspensions. The present study although preliminary, shows that flocculation is a significant process in the marginal marine environment and flocculation occurs within a few hours of mixing. Over long time scales, the mixing phenomenon may act as a significant process for removal of dissolved metals onto the flocculated particles.
Citation: Current Science (2010), 99(2): 213-215
URI: http://repository.iitr.ac.in/handle/123456789/6117
Issue Date: 2010
Keywords: Flocculation
Geonanomaterials
Ionic strength
Mixing zone
ISSN: 113891
Author Scopus IDs: 36669517100
6701873646
Author Affiliations: Viswanathan, M., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Chakrapani, G.J., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Corresponding Author: Chakrapani, G.J.; Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247 667, India; email: chakrapani.govind@gmail.com
Appears in Collections:Journal Publications [ES]

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