Prasanna Kumarathilaka

Prasanna Kumarathilaka
University of Southern Queensland  · School of Civil Engineering and Surveying

PhD

About

35
Publications
24,902
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1,173
Citations
Introduction
A skilled and experienced researcher with over eight years’ experience across research and academia within the area of environmental sciences, engineering, and management. Strong ability for handling high-tech analytical instruments and to develop analytical protocols. Exceptional skills in publishing innovative research findings in top ranking journals and passionate about developing research proposals in high priority areas
Additional affiliations
February 2017 - May 2021
University of Southern Queensland 
Position
  • PhD Student
April 2013 - January 2017
National Institute of Fundamental Studies - Sri Lanka
Position
  • Research Assistant

Publications

Publications (35)
Article
Production of rice grains at non-toxic levels of arsenic (As) to meet the demands of an ever-increasing population is a global challenge. There is currently a lack of investigation into integrated approaches for decreasing As levels in rice agro-ecosystems. By examining the integrated iron-modified rice hull biochar (Fe-RBC) and water management ap...
Article
The health risks associated with ingestion of arsenic (As) via consumption of rice are a global concern. This study investigated the effects of integrated biochar (BC)-water management approaches to As stress and to associated health risks in rice. Rice cultivars, Jayanthi and Ishikari, were grown, irrigated with As-containing water (1 mg L⁻¹), und...
Article
Arsenic (As) in rice agroecosystems causes a loss of both rice yield and quality of rice grains. In this study, an integrated approach of biochar (BC) and alternative water management is proposed to reduce As content while sustaining essential elemental concentrations in rice. The rice cultivar, Jayanthi, was grown, irrigated with 1 mg L − 1 of As-...
Article
Inductively Coupled Plasma Mass Spectrometry (ICP-MS) hyphenated to High Performance Liquid Chromatography (HPLC) and Ion Chromatography (IC) are widely used for simultaneous speciation of arsenic (As). Longer retention time resulting in a slow separation is the major drawback of these existing approaches. Besides, fast separations achieved from HP...
Article
The transformation of trace metals (TMs) in natural environmental systems has created significant concerns in recent decades. Ultramafic environments lead to potential risks to the agricultural products and, subsequently, to human health. This unique review presents geochemistry of ultramafic soils, TM fractionation (i.e. sequential and single extr...
Article
Full-text available
The potential of biochar, produced from fibrous organic fractions of municipal solid waste (MSW), for remediation of benzene, one of the frequently found toxic volatile organic compounds in landfill leachate, was investigated in this study based on various environmental conditions such as varying pH, benzene concentration, temperature and time. At...
Article
Full-text available
Human exposure to As through rice consumption is a worldwide health concern. There is an urgent need to either remediate As contaminated paddy soils, or to screen for low As accumulating rice varieties, thereby limiting the build up of As in their grains. This review presents a number of agronomic, physico-chemical, and biological approaches that m...
Article
Full-text available
Human exposure to arsenic (As) through the consumption of rice (Oryza sativa L.) is a worldwide health concern. In this paper, we evaluated the major causes for high inorganic As levels in cooked rice foods, and the potential of post-harvesting and cooking options for decreasing inorganic As content in cooked rice, focusing particularly on As endem...
Article
Rice is the main staple carbohydrate source for billions of people worldwide. Natural geogenic and anthropogenic sources has led to high arsenic (As) concentrations in rice grains. This is because As is highly bioavailable to rice roots under conditions in which rice is cultivated. A multifaceted and interdisciplinary understanding, both of short-t...
Chapter
Full-text available
Pyrolysis is the foremost thermal conversion process that can be successfully used to transform biomaterials into a value-added product. The estimated biodegradable portion is prominent and denotes as 60% from total waste generation in Asian developing countries. There have been several studies on exploring the pyrolysis of complex organic fraction...
Article
Presence of organic and inorganic acids influences the release rates of trace metals (TMs) bound in contaminated soil systems. This study aimed to investigate the influence of bioenergy waste biochar, derived from Gliricidia sepium (GBC), on the proton and ligand-induced bioavailability of Pb and Cu in a shooting range soil (17,066mg Pb and 1134mg...
Article
Full-text available
Crops grown in metal-rich serpentine soils are vulnerable to phytotoxicity. In this study, Gliricidia sepium (Jacq.) biomass and woody biochar were examined as amendments on heavy metal immobilization in a serpentine soil. Woody biochar was produced by slow pyrolysis of Gliricidia sepium (Jacq.) biomass at 300 and 500 °C. A pot experiment was condu...
Chapter
Full-text available
Municipal landfill leachate is a complex refractory wastewater which consists of extensive level of organic compounds, ammonia, and heavy metals. Contamination of water by landfill leachate has become a serious environmental concern worldwide due to its adverse impact on human health, aquatic organisms, and agricultural crop production. In recent y...
Article
Full-text available
Perchlorate ( ClO4- ) is a strong oxidizer, capable of accelerating heavy metal release into regolith/soil. Here, we assessed interactions between ClO4- and serpentine soil to simulate and understand the fate of Ni and Mn and their immobilization with the presence of biochar (BC). A soil incubation study (6 months) was performed using serpentine so...
Chapter
Municipal solid waste (MSW) is produced at an alarming rate, which may have a negative impact on the environment and on human health, if not properly managed. Open landfills are the most common way of disposing of MSW in the developing world. Landfill leachates generated from such open dump sites are directed to surface water bodies with no treatme...
Chapter
Globally, around 10 × 107 tons year−1 of biosolids is generated from wastewater treatment facilities. Biosolids contain significant amounts of organic matters and nutrients. Therefore, biosolids can be used to improve infertile and degraded soils in certain mine sites. Shortfalls in topsoil, heavy metal–rich tailings and drainage, residual soils wi...
Article
Full-text available
Background Iodine is an essential micronutrient used by the thyroid gland in the production of thyroid hormones. Both excessive and insufficient iodine intakes can cause thyroid diseases thus harmful to the human body. Inadequate iodine intake by human body causes Iodine Deficiency Disorders (IDD) and hypothyroidism. Excessive iodine intake causes...
Article
Natural processes and anthropogenic activities may result in the formation and/or introduction of perchlorate (ClO4⁻) at elevated levels into the environment. Perchlorate in soil environments on Earth and potentially in Mars may modify the dynamics of metal release and their mobilization. Serpentine soils, known for their elevated metal concentrati...
Chapter
Full-text available
Among different anthropogenic activities, urbanization has greatly influenced the hydrological cycle. Due to increased impervious surfaces, the amount of infiltration has been reduced, thereby increasing the runoff volume leading to flood conditions even for low rainfall events. Storm water flow along these impermeable surfaces finally ends up in s...
Article
Fate and transport of volatile organic compounds (VOCs) in landfill leachate causes environmental pollution and human health concern. These VOCs can directly be emitted to the atmosphere and also can end up in leachate plume from open solid waste dumpsites. However, no data exists on the VOCs in landfill leachate in Sri Lanka. Hence, the purpose of...
Article
Perchlorate ( ) is a strong oxidizer and has gained significant attention due to its reactivity, occurrence, and persistence in surface water, groundwater, soil and food. Stable isotope techniques (i.e., (18O/16O and 17O/16O) and 37Cl/35Cl) facilitate the differentiation of naturally occurring perchlorate from anthropogenic perchlorate. At high eno...
Article
Full-text available
Embedding nanoparticles into an inert material like graphene is a viable option since hybrid materials are more capable than those based on pure nanoparticulates for the removal of toxic pollutants. This study reports for the first time on Cr(VI) removal capacity of novel starch stabilized nanozero valent iron-graphene composite (NZVI-Gn) under dif...
Article
Full-text available
Purpose In this study, we investigated the effect of biochar (BC) and fungal bacterial co-inoculation (FB) on soil enzymatic activity and immobilization of heavy metals in serpentine soil in Sri Lanka. Materials and methods A pot experiment was conducted with tomatoes (Lycopersicon esculentum L.) at 1, 2.5, and 5 % (w/w) BC ratios. Polyphenol oxida...
Conference Paper
Full-text available
Municipal landfills act as a source for wide range of compounds with environmental and human health concern. Volatile organic compounds (VOCs) are carcinogenic and mutagenic and present in industrial and household wastes that are disposed in municipal landfills. These VOCs can directly be emitted to the atmosphere and also can end up in leachate fr...
Conference Paper
Full-text available
Serpentine soil is rich in heavy metals resulting unfavorable conditions for plants. Biochar is a novel soil amendment with an ability to remediate pollutants environmental friendly manner. In this study, biochar (BC) was examined as a potential soil amendment on the activity of soil microorganisms and heavy metal immobilization in serpentine soil....
Conference Paper
Full-text available
Serpentine surrounding soil systems containing high amounts of heavy metals may be unfavorable environments for crop growth and soil microorganisms. The application of biofilm (BF) and biochar (BC) was examined as potential bioamendments on the activity of soil microorganisms and Ni bioavailability in serpentine soil. Bacteria were isolated from se...
Article
Full-text available
Purpose: Serpentine soils derived from ultramafic rocks release elevated concentrations of toxic heavy metals into the environment. Hence, crop plants cultivated in or adjacent to serpentine soil may experience reduced growth due to phytotoxicity as well as accumulate toxic heavy metals in edible tissues. We investigated the potential of biochar (B...
Article
Full-text available
Even though serpentinite outcrops cover approximately 1% of total terrestrial land in the world, they have gained significant importance due to the high level of heavy metals such as Cr, Ni, Mn and Co leading to surface and groundwater contamination in addition to the dispersion via wind as particulate matter. Accordingly, both fauna and flora in t...
Article
Full-text available
Even though serpentinite outcrops cover approximately 1% of total terrestrial land in the world, they have gained significant importance due to the high level of heavy metals such as Cr, Ni, Mn and Co leading to surface and groundwater contamination in addition to the dispersion via wind as particulate matter. Accordingly, both fauna and flora in t...

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Project (1)
Project
Arsenic transportation from soil to water and vice versa and subsequently to rice, is a serious matter in locations with high arsenic concentrations in water and/or soil. Transfer and accumulation of arsenic in edible parts of lowland rice is an emerging problem in most countries where rice is considered as the staple food but also can affect countries which import rice as a recent study from UK shows where it has been reported that over half (58%) of baby rice products analysed exceed new EU limits for arsenic. It is known that rice is one of the major contributors for arsenic exposure to humans. Our present research is aiming to understand the holistic mechanism of arsenic dynamics in rice ecosystem, particularly water and grain contamination. Final aim is to develop strategies to reduce the arsenic movement through the food and water systems to mitigate one of the globe’s major health challenge.