Study of Geochemical Association of Some Trace Metals in the Sediments of Chilika Lake: A Multivariate Statistical Approach
- 7 September 2006
- journal article
- Published by Springer Nature in Environmental Monitoring and Assessment
- Vol. 123 (1-3), 125-150
- https://doi.org/10.1007/s10661-006-9187-8
Abstract
In order to establish the natural processes and geochemical factors responsible for enrichment of trace metal ions (Cu, Co, Ni, Zn and Cr) with respect to textural parameters (sand, silt and clay weight percentages) along with depth, multivariate statistical approach has been carried out for sediments in different water zones of Chilika lake, the largest brackish water lagoon in Asia. The rotated varimax factor results reveal that Cobalt enrichment is controlled by both textural parameters as well as adsorption mechanism. In fresh and saline water region, textural parameters and in mixed water, adsorption phenomenon predominates. Zn in fresh water is related to clay, whereas it is in adsorbed state in mixed water. Cu in fresh water sediments is in absorbed state and in mixed water it is related to depth and Co concentration. Cr does not show any specific association in fresh water, but in both mixed and saline water it is associated with clay minerals. Although both textural parameters and adsorption mechanism play an important role for the enrichment of trace metal ions in these lagoonal sediments, their relative importance varies with specific metal ions as well as the water quality. Sequential extraction technique was used to characterize the various forms of metals in the < 63μ size sediments of Chilika lake. The concentrations determined indicated selective accumulation of the various metals in the different phases with spatial variability in different water zones. Slightly higher availability of Co and Zn near Balugaon township in exchangeable phase may be related to anthropogenic activities. Among the non-lithogenous (NL) phases, reducible phase associated with higher concentration of Ni, Cu and Cr. Organic bound Zn and Co contributed highest percentages among NL fractions. Residual fraction contributed more than 50% in most of the cases, reflected the predominance of physical weathering, high erosion rate along the drainage basin.Keywords
This publication has 20 references indexed in Scilit:
- Geochemistry of sediments from the Mangalore-Cochin shelf and upper slope off southwest India: Geological and environmental factors controlling dispersal of elementsChemical Geology, 1990
- Trace metals distribution in huanghe (Yellow River) estuarine sedimentsEstuarine, Coastal and Shelf Science, 1988
- Trace-metal geochemistry of sediments from Baffin BayCanadian Journal of Earth Sciences, 1984
- Sequential extraction procedure for the speciation of particulate trace metalsAnalytical Chemistry, 1979
- Distribution and partition of cobalt, nickel, chromium, and vanadium in the sediments of the Saguenay fjordCanadian Journal of Earth Sciences, 1976
- Plankton: Its chemical composition and its significance as a source of pelagic sedimentsChemical Geology, 1974
- Formation of the Barrier Spit and other sand ridges near Chilka Lake on the east coast of IndiaMarine Geology, 1970
- Chromium speciation in sea waterEarth and Planetary Science Letters, 1970
- Controls on Mn, Fe, Co, Ni, Cu, and Zn Concentrations in Soils and Water: the Significant Role of Hydrous Mn and Fe OxidesPublished by American Chemical Society (ACS) ,1968
- A Biometrics Invited Paper. Factor Analysis: An Introduction to Essentials II. The Role of Factor Analysis in ResearchPublished by JSTOR ,1965