T.B.N.s. Madugalla

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• BSc, PhD
• Senior Lecturer at South Eastern University of Sri Lanka

The central region of Sri Lanka hosts extensive marble deposits with significant mineralogical and geochemical variations across different locations. Understanding these differences is essential for assessing the potential and practical applications of Sri Lankan marble on a large scale. This study investigates the economic potential of marbles fro...

Beach placers are typically rich in heavy minerals, which are crucial for a wide range of industrial applications. This study investigates the human and environmental risks posed by toxic heavy metals (As, Pb, Zn, Cu, Cr, Fe, V and Mn) in beach placers of southeastern Sri Lanka using 42 X-ray fluorescence data. Risk indicators (EF, I , CF and PLI)...

Coconut shells (CS) are considered a promising renewable precursor for the synthesis of carbon black (CB). This study explores the potential of coconut shell-based activated carbon black (ACB) as a sustainable solution for black colourant in printing applications, by cabonization parameters for CB synthesis and introducing a low-temperature chemica...

The special calcite bodies (CBs) exposed within the ultrahigh temperature (UHT) granulite facies terrain in the Balangoda area of Sri Lanka preserve shreds of evidence for the generation of crust-derived carbonatite in the crust. The CBs are exclusively made up of massive calcites and appear as concordant bands extending tens of meters or as meso-s...

The dataset contains grain size data of placer and non-placer sediments in lagoonal and riverine beaches of southeastern part of Sri Lanka. A total of 124 swash sediment samples were collected from a 70 km long coastline with an interval of 500 m. Placer sediments in the area mainly have mineralogy of ilmenite, zircon and almandine while non-placer...

At present Microplastics (MPs) have been recognized as one of the most critical and emerging sources of marine pollution with a significant impact on marine and coastal biota. The current study aimed to comprehend MP pollution along the Southeastern coast of Sri Lanka by investigating their spatial distribution, morphology, composition and possible...

Recently, xerographic printing technology has been rapidly developed with the use of dry toner powders for a quality printing process. Polymeric resin, pigment, and charge control agents are the basic components of toner powders. Carbon black is the primary pigment used in toner preparation, which is obtained by incomplete combustion of petroleum o...

In recent years, significant attention has been paid to natural calcite resources as a viable CaCO 3 reservoir for various industrial applications. Despite extensive marble occurrences in the Highland Complex (HC) of Sri Lanka, their usage is limited to a few conventional industries owing to their chemical heterogeneity and dolomitic nature. Howeve...

Over the last two decades, the prospecting of Rare Earth Elements (REEs) has been extensively increased owing to their wider industrial applications. Stream sediments which are rich in precious gem minerals are considered as one of the emerging alternative sources of REEs with minable concentrations. Hence the present study aimed to investigate the...

Coconut shells (CS) are one of the main domestic wastes that are abundantly used as a precursor to producing activated carbon black (ACB) for various purposes. This study investigated a lowtemperature chemical activation method (LTCA) using NaOH to prepare ACB from CS to apply as the black colourant in toner production. Initially, the cleaned CSs w...

Microplastics (MPs), plastic particles smaller than 5 mm in size, are one of the most emerging environmental threats across the globe significantly in marine environments as a consequence of their non-biodegradability and bioaccumulation. Although garbage dumping with plastic debris could be seen along the Southeast coastline of Sri Lanka, this are...

Beach placers are concentrations of economically potential minerals formed by surface earth processes and are identified as one of the most easily exploitable mineral deposits in the world. We studied the placer and non-placer sediments in lagoonal and riverine beaches of the southeastern part of Sri Lanka to unravel their specific sedimentary feat...

The beach placers are largely composed of resistant heavy minerals and are known as one of the most easily exploitable mineral deposits in the world. Such placers are commonly deposited along the edges of large water bodies due to the gravity separation processes. The southeastern coast of Sri Lanka contains extensive depositional beaches, lagoons,...

Southeastern landmass of Sri Lanka is laid on the Vijayan Complex (VC) rocks, a Precambrian basement characterized with specific geological features since the mineralized contact zone of the Highland–Vijayan boundary is nearby. However, the coastal sedimentation of such a basement is rarely interpreted. Hence, the mineralogy and geochemistry of sur...

The Southeast (SE) coastline of Sri Lanka is located on the southwestern border of Bay of Bengal and has been identified as a progressive coastline that laid on the high-grade metamorphic rocks of the Vijayan Complex (VC). However, the mineral and geochemical compositions of the sediments of this coastline are yet to be understood. In this study, t...

synthesis of nanomagnetite by using natural iron ore deposits located in Sri Lanka

Proterozoic high‐grade marbles cover a significant portion of the Highland Complex (HC) of Sri Lanka. Although many studies on metamorphic silicate rocks of the country have been carried out, marbles, which can be used as a tool to interpret the evolution history of the crust, has been paid little attention. The present study aims to understand the...

Beach-rocks are cemented coastal sediments that occur mainly under subtropical to tropical climatic conditions. Due to higher biogenic chemical association on the beach fronts, Sri Lanka comprises variety of beach-rocks around the island. This study was aimed to report the field, mineralogical and geochemical characteristics of ilmenite rich beach-...

Economically important, unique calcite deposits occur in high-grade marbles near the litho-tectonic boundary between the Highland Complex (HC) and Vijayan Complex (VC) around Balangoda. The present study aimed to characterize trace element geochemistry of the differently coloured calcite of these deposits to postulate their possible origin. Combine...

Southeast (SE) coast of Sri Lanka has been identified as a progressive type beach, which is located in a coastal current mixing zone of the Indian Ocean. Although studies on the ocean current circulations have been carried out, sedimentological characterization on the coastal sediments has been less studied despite their significance. The present s...

The accumulation of dye in natural water bodies is becoming a burning issue in present day environment. Among the available methods, adsorption using low cost natural adsorbents is being extensively used for the removal of dyes from wastewater. The objective of this study is to investigate the potential use of calcitic marbles of Sri Lanka as an ad...

Commercial exploitation of iron ore deposits is usually determined by their geochemical characters. As a result, a pre-investigation of geochemical pattern of such ore bodies would be constructive in mineral prospecting. The present study aimed to investigate chemical distribution of iron ore deposit exposed in Buttala, Monaragala District, Sri Lan...

Iron ore deposits have greater industrial significance since they supply raw material for steel based industries and such applications are majorly based on their ore grade. Therefore, initial clear understanding of mineralogical and chemical characteristics of these ores would be advantageous. Present study aimed to characterize mineral and chemica...

Textural studies of carbonate minerals over the past three decades revealed that their textures are useful tool for understanding of petrogenesis of carbonatites. Petrographic, cathodoluminescence (CL) and electron-microprobe studies on textures of calcite and dolomite were performed for interpretation of evolution of Eppawala carbonatites in Sri L...

Abstract Extensive vein-type mica deposits at Elahera in north-central Sri Lanka are associated with meta-ultrabasite (MUB) boudins in impure marbles. Mineralization occurs as discontinuous, lenticular bodies concordant with the impure marbles at the contacts with MUB. Impure marbles show typical granulite facies assemblages overprinted by retrogra...

The calcite rich carbonate rocks (CRR) with in the granulite facies metamorphic rocks of Balangoda, Sri Lanka reflect uncommon calcite deposits. The present study investigates the mineralogical and geochemical characteristics of the CRR to constraints the petrogenesis of them. The CRR formations appear to be hosted in the dolomitic marbles of Highl...

Extensive vein-type mica and metal sulphide mineralization at Moragahakanda in north-central, Sri Lanka is associated with meta-carbonate rocks of the Highland Complex. Mica deposits in the area are currently being mined and exported. The underlying rocks of the area have been intruded by several granitic pegmatites. The present study investigates...

Sri Lanka is gifted with large resources of marble covering approximately 10% of land area. However, most of them are impure varieties containing varying amounts of MgCO3 and CaCO3.The applicability of these rocks in the synthesis of Precipitated Calcium Carbonate (PCC) was investigated. Simultaneously, the effect of Mg ions on precipitation of PCC...

The study investigates the possibility of using carbonatite in the production of precipitated calcium carbonate (PCC). We made use of fresh apatite-rich carbonatites found at the phosphate mining sites at Eppawala, Sri Lanka. Analyses of the fresh carbonatite were performed with the aid of optical microscopy, powder X-ray diffraction (XRD), atomic...

ABSTRACT Carbonatites are uncommon rocks which are made up of more than 50 percent carbonate minerals. Exposures of carbonatite bodies were found at Kawisigamuwa in Kurunegala district. However the basement rock of the deposit has not yet been revealed. Present study was carried out to investigate the anatomy, petrography, origin and weathering pro...

Geostatistics for the Assessment of Depths to Bedrock and Water Table – A Case study from Kandy Sri Lanka. , 28 June - 7 July 2011, Melbourne, Australia. p 42.

Infrastructure development needs engineering judgments for which expensive geotechnical investigations are the prerequisite. Alternatively, few data points could model using geostatistics to obtain meaningful outcome. To test this, a project was formulated with 129 borehole data collected from the Kandy City Wastewater Project in Sri Lanka. Statist...