Geography - Master Dissertation

Permanent URI for this collectionhttps://kr.cup.edu.in/handle/32116/90

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    Determination Of Trace Metals In Different Phases Of Sediments By Sequential Extraction Method
    (Central University of Punjab, 2018) Swain, Subhransu; K Pattanaik, Jitendra
    Elements are distributed in different phase based on their affinity to different complexes present in the sediment phases. Some phases are rich in certain element due to geochemical behaviour of that element.Sediments from weathering profile and river bedload carries information about the chemical weathering intensity, neoformations, type of clay minerals formed due to alteration ofprimary mineral phase. XRD analysis gives us information about the distribution of different minerals presents in weathering profile and bedload deposits. Change in mineral assemblage from weathering profile to bedload deposits by different surficial process can be obtained from mineralogical and geochemical analysis of sediments. Semi-quantification and mineral phase identification from XRD analysis shows mineral distribution and indicate the clay mineral percentage is high in the weathering profile sediments.An analytical procedure involving sequential extraction have been developed for understanding partitioning of particulate trace metals into five fractions: exchangeable, bound to carbonates, bound to Fe-Mn oxides, bound to organic matter and residuals.Sequential leaching of weathering profile sediments indicate that the partitioning of trace elements like Pb, Ni, Cu, Zn, Tl and Thin organic phase is high and it contains 50-70% of the total. Whereas, element like Co, Cd, U is in lower concentration which is varies between 0 - 20 %.Except As, U Tl all other element shows higher (> 50%) partitioning in the organic phase of the Bed load sediments.
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    Dissolution rate of Basalt
    (Central University of Punjab, 2018) K Panigrahi, Somesh; K Pattanaik, Jitendra
    Physical weathering, Chemical weathering, climate and grain size strongly influences the weathering rate of dissolution. To determine the basalt dissolution rate at various physical-chemical conditions and create an artificial weathering set up by controlling pH, time, grain size in the lab. Three fresh (F.R A1, A2 and Fresh basalt (2/RT12/2)) and one weather (B1) samples of basalt was taken for the defining the rate of weathering. 125-75 and 75-38?m grains size of samples were treated with pH 4, pH 6 continuously agitate for 24, 72, 48 hours and 168 hours at room temperature. Mineral phase identification and geochemical measurements were carried out using XRD and ICP-MS analysis. B1 is less dense compared to other three samples (F.R A1, A2 and Fresh basalt (2/RT12/2)) and A2 shows the high density. Initial pH 4 changed into pH 4.5 and the pH 6 samples changed into pH 7 during dissolution of basalt. In Acidic condition/ low pH the leached elemental concentration is found to be high. Effect of grain size variation in the dissolution rate found to be less. The dissolution rate is higher in the initial stage and reduced with time. Weathered samples shows higher mineral dissolution rate compare to the fresh basalt.
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    Mineralogical And Geochemical Studies Onbed Load Sediments Of Gumani River "Implications For Provenance And Weathering Processes"
    (Central University of Punjab, 2018) Bej, Binaya; K Pattanaik, Jitendra
    Geochemical and mineralogical study of bed load sediments will help to understand the weathering process, the intensity of weathering and the denudation in various environmental conditions, origin, mode of occurrence, biological and physic-chemical processes, mobilization and transport of various elements. River draining a single lithology helps to study above parameter of the catchment area. So here GumaniriverdrainingRajmahal basalt was selected as there is no report or literature available from this catchment to understand the weathering process in its water shade. The mineral compositions of the river bed load sediments from different locations shows quartz, calcic plagioclase, clinoenstatite clay minerals such as gibbsite, kaolinite, illite, goethite and clay micas, are dominating mineral phases. Clay mineral percentage is higher in the upper reaches compare to thelower reach of the river. Clay mineral gibbsite and kaoline indicate the removal of silica is higher in the upper reach and shows kaolintization, lateritization and upto some degree of Bauxitization process is active in the upper reach. CIA value, A-CN-K, A-CNK-FM ternary diagram indicate the intensity of weathering is moderate to high at different location. The index of lateritization shows clear indication of kaolintization?lateritization?Bauxitization process.