Geostatistical mapping of heavy metals (Cd, Cr & Zn) distribution in the sediments of Salut Lagoon, Sabah

Wong Vui Chung @ Webster Wong, (2006) Geostatistical mapping of heavy metals (Cd, Cr & Zn) distribution in the sediments of Salut Lagoon, Sabah. Masters thesis, Universiti Malaysia Sabah.

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Abstract

Fifty (50) geocoded surface sediment samples were taken from Salut Lagoon, which is situated about 15 km northeast of Kota Kinabalu, Sabah. These total sediments were analyzed by using Atomic Absorption Spectrometry method (AAS). The objective of this study was to assess the concentration and the spatial distribution of the heavy metal (Cd, Cr and Zn), and compare maps generated using geostatistical techniques i. e. ordinary and indicator kriging. Assessment on the concentration and spatial distribution of heavy metals in the surface sediments of Salut Lagoon showed that the mean concentration for Cd, Cr and Zn are 6.1 mg kg-1 , 15.5 mg kg-1 and 262 mg kg-1 respectively. The spatial distributions of the heavy metals in the surface sediments of Salut Lagoon are mainly control/ed by physico-chemical factors and landuse patterns. Considering the sedimentary geology of the area, and comparison with other areas indicates that the Salut Lagoon shows high levels of Cd and Zn in the surface sediments. Both ordinary and indicator kriging maps for Cd, Cr and Zn concentrations were generated. Indicator kriging maps have proven to be more robust and suitable for decision-making and heavy metals management purposes.

Item Type:Thesis (Masters)
Subjects:?? QE351-399.5 ??
Divisions:SCHOOL > School of Science and Technology
ID Code:353
Deposited By:IR Admin
Deposited On:19 Nov 2010 14:31
Last Modified:19 Nov 2010 14:31

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