Geochemistry of two sediment cores from the west coast of India
Journal Title: International Journal of Environmental Science and Technology - Year 2005, Vol 1, Issue 4
Abstract
Copper, Pb, Zn, Ni, Co, Mn, AI, Ca, magnetic susceptibility and loss on ignition of sediments from two cores near Mangalore along the western continental shelf of India have been studied. The sediments have high Al and organic matter contents due to the high sedimentation rate and their proximity to river mouths. Down-core variations of elements indicate a decrease of lithogenous component during probably the past few centuries. While abundance of calcareous shells in some zones has lead to the dilution of most of the metals, it appears that Pb and Mn are associated with this phase. Copper, Zn and Fe are associated with organic matter and detrital particles, whereas Ni and Co are predominantly associated with the insoluble fraction. Oxides/hydroxides of Fe and Mn are absent because of the reducing conditions and the high terrigenous influx. Geochemically, Mn and Fe are present in different phases of sediments (in the insoluble fraction and organic matter respectively). The Fe content of one of the cores is positively correlated with magnetic susceptibility.
Authors and Affiliations
A. R. Karbassi , R. Shankar
Keywords
Related Articles
- EP ID EP133982
- DOI -
- Views 95
- Downloads 0
Sulphate reducing bacteria to precipitate mercury after electrokinetic soil remediation
Combined treatment with electroremediation and sulphate reducing bacteria (SRB) was tested in laboratory and pilot scale. The contaminated soil came from a chlor-alkali factory and contained about 100 mg/kg Hg. Iodide/io...
Envrionmental impact assessment of urban development plan by vulnerability model application
Urban development plans have significant potential impacts on affected environment according to the various activities and due to their different construction and operation phases. Establishment and development of the ne...
Biological Indicators of Air Quality in Brisbane, Australia
During very considerable progress in industry and industrial centres development in late 20th and early 21st century, air pollution has become one of the most significant problems of mega cities. Thus, air pollution surv...
Influence of gender and type of school on environmental attitude of teachers in Iran and India
The present study reports on secondary school teacher’s environmental attitude in India and Iran. One thousand and four teachers were selected through the stratified random sampling technique from 103 secondary schools o...
Determination of Design Criteria for UASB Reactors as a Wastewater Pretreatment System in Tropical Small Communities<br />
A pilot scale study was set up to investigate the principle design parameters of upflow anaerobic sludge blanket (UASB) reactors for treating wastewater of small communities in the tropical regions of Iran. A steel pipe...