Department of Bio-science: Recent submissions

Now showing items 1-20 of 88

Mangifera indica leaves as a biosorbent to treat municipal wastewater in Vavuniya District

Rishaya, N.M.; Devaisy, S. (Faculty of Applied Science, 2023-10-25)

The rapid urbanization in Vavuniya town resulted in high volumes of urban drainage which collectively entered into Vavuniya tank located in the heart of Vavuniya town area. The existing treatment system for urban ...
BIOCHAR-MEDIATED REMEDIATION OF POLYCYCLIC AROMATIC HYDROCARBONS IN WASHING EFFLUENT FROM AUTOMOBILE SERVICE STATION SOIL

Gunarathna, H.M.D.S.; Pallewatta, S.; Devaisy, S.; Rajapaksha, A.U.; Vithanage, M.S. (National Science and Technology Commission, 2024-01-26)

Petroleum hydrocarbon contamination resulting from human activities including spills, industrial manufacturing, and fossil fuel disposal is a global environmental issue. Considering the contamination of soils by petroleum ...
Removal of Water Hardness from groundwater using Lemon peel derived biochar

Hafsa, H.N.F.; Devaisy, S. (Faculty of Applied Science, 2023-10-25)

Water hardness is the amount of dissolved calcium and magnesium ions in the water. Problems with hardwater include toughening of skin and hair, spots on sinks and clothes, scaling in boilers, washing machines, and ...
Treatment of Coir mill wastewater using activated charcoal

Amarasuriya, A.P.S.; Karunarathne, D.; Devaisy, S. (Faculty of Applied Science, 2023-10-25)

The coir mill industry plays a significant role in the national economy, but its wastewater poses a substantial environmental challenge due to its high electrical conduc- tivity (EC), high chemical oxygen demand (COD) ...
Rice husk charcoal waste to treat the wastewater discharged by Rubber reclamation industry

Thilanka, C.; Devaisy, S. (Faculty of Applied Science, 2023-10-25)

This study addresses the substantial environmental challenges associated with the rubber reclamation process, characterized by the generation of two prominent waste streams: wastewater and waste burnt rice husk, termed ...
Dual Membrane - Adsorption Hybrid System as a Sustainable Water Reuse System

Devaisy, S.; Vigneswaran, S. (Faculty of Technology, Eastern University, Sri Lanka, 2023-09-27)

Dual membrane hybrid systems are becoming emergent in the production of high-quality reclaimed water for reusable purpose where microfiltration (MF) followed by Reverse Osmosis (RO) is commonly used worldwide. However, ...
Eichhornia crassipes Leaves as a Waste-derived Bio-Sorbent to Remove Organics and Nutrients from Rice Mill Wastewater

Farwin, A.F.S.; Pratheepkumar, M.; Devaisy, S. (Department of Forestry and Environmental Science University of Sri Jayewardenepura, 2023-01-28)

The increased rate of population growth resulted in the increased number of rice mill industries to fulfill the demand for rice. The rice mill wastewater contains a high load of organics and nutrients. Therefore, the direct ...
Treatment of Aquaculture Effluent through Combined Phytoremediation and Biosorption Techniques

Rasanga, K.L.D.C.; Devaisy, S. (General Sir John Kotelawala Defence University, 2022-09-29)

Aquaculture has significant effects on the environment, the discharge of aquaculture wastewater without treatment causes several environmental impacts such as destruction of natural habitats, reduction in the abundance and ...
Treating rice mill effluent using waste rice hull

Uduwarage, U.D.T.M.; Devaisy, S. (South Eastern University of Sri Lanka, 2021-11-30)

In Sri Lanka, about 95% of the population consume rice as their staple food. The increase of the population leads to an increment of the number of rice mills to meet the demand. This resulted in the generation of huge ...
Membranes in Water Reclamation: Treatment, Reuse and Concentrate Management

Devaisy, S.; Kandasamy, J.; Nguyen, T.V.; Ratnaweera, H.; Vigneswaran, S. (MDPI, 2023-06-15)

In this article, an extensive examination is provided on the possible uses of membranes and hybrid processes in wastewater treatment. While membrane technologies face certain constraints, such as membrane fouling and ...
Removal of Organics with Ion-Exchange Resins (IEX) from Reverse Osmosis Concentrate

Devaisy, S.; Kandasamy, J.; Aryal, R.; Johir, M.A.H.; Ratnaweera, H.; Vigneswaran, S. (MDPI, 2023-01-20)

Reverse osmosis concentrate (ROC) produced as the by-product of the reverse osmosis process consists of a high load of organics (macro and micro) that potentially cause eco-toxicological effects in the environment. Previous ...
Comparison of Membrane-Based Treatment Methods for the Removal of Micro-Pollutants from Reclaimed Water

Devaisy, S.; Kandasamy, J.; Nguyen, T.V.; Johir, M.A.H.; Ratnaweera, H.; Vigneswaran, S. (MDPI, 2022-11-16)

Dual membrane hybrid systems generally produce reclaimed water for non-potable uses by blending microfiltered biologically treated sewage effluent (BTSE) and reverse osmosis (RO) permeate. This reclaimed water is found to ...
A study of the correlation between local meteorology and atmospheric particulate matter in Kandy and Battaramulla in Sri Lanka

Batuwita, P.M.; Ranawaka Arachchi, R.A.W.; Santhiyago, P.U.; Jayasundara, J.J.M.A.D.; Naveendrakumar, G. (Faculty of Science University of Kelaniya Sri Lanka., 2023-12-10)

Air pollution due to particulate matter (PM) remains a significant environmental concern, especially in urban areas. This study examines the relationship between PM concentrations and meteorological parameters of two ...
Historical trends in averages and extremes of rainfall, temperature and runoff of Sri Lanka

Naveendrakumar, G.; Pathmarajah, S.; Meththika, V.; Jayantha, O.; Iqbal, M.C.M. (National Research Council 120/7, Vidya Mawatha, Colombo 07, Sri Lanka., 2023-12-11)

Historical trend assessment is an essential part of the climate change investigation efforts. Due to several reasons, including regional climatic fluctuations, Sri Lanka is likely to have a feedback effect on the local ...
Chemical characteristics of bulk deposition in Sinharaja and Mattakkuliya, Sri Lanka

Wijerathna, A.I.S.S.; Naveendrakumar, G.; Amarathunga, A.A.D.; Pemarathne, S.K.S. (Young Scientists’ Association (NIFS-YSA), National Institute of Fundamental Studies, Hanthana Road, Kandy, Sri Lanka., 2023-09-23)

The chemical characteristics of bulk deposition vary with climatic seasons. This study aimed to investigate the chemical characteristics of bulk deposition in Sinharaja, a rainforest site, and Mattakkuliya, an urbanized ...
Diurnal and seasonal variations of ground-level ozone and nitrogen dioxide in Battaramulla and Kandy, Sri Lanka

Batuwita, P.M.; Ranawaka Arachchi, R.A.W.; Santhiyago, P.U.; Kalpage, L.U.; Jayasundara, J.J.M.A.D.; Naveendrakumar, G. (Young Scientists’ Association (NIFS-YSA), National Institute of Fundamental Studies, Hanthana Road, Kandy, Sri Lanka., 2023-09-23)

This study examines the impact of solar radiation on ozone (O3) formation and nitrogen dioxide (NO2) depletion in Battaramulla and Kandy, Sri Lanka. Objectives include investigating diurnal and seasonal variations of solar ...
Spatial Variability of Selected Soil Chemical Parameters in Low-yielding Paddy Production Block in Mahaweli System H, Sri Lanka

Attanayaka, A.M.S.M.; Akther, M.S.R.; Naveendrakumar, G. (The Department of Forestry and Environmental Science, University of Sri Jayewardenepura, 2023-01-28)

Although water availability for paddy production in Mahaweli System H is abundant, paddy yield is lower in Nochchiyagama (278 km2), chosen for soil assessment. Paddy yield data were used to identify the low-yielding division ...
Assessment of Forest Cover Changes in Vavuniya District, Sri Lanka: Implications for the Establishment of Subnational Forest Reference Emission Level

Vijitharan, S.; Sasaki, N.; Venkatappa, M.; Tripathi, N.K.; Abe, I.; Tsusaka, T.W. (MDPI, 2022-07-12)

Assessment of forest cover changes is required to establish the forest reference emission level (FREL) at any scale. Due to civil conflict, such assessments have not yet been undertaken in Sri Lanka, especially in the ...
Paddy Production Efficiency of the Farmers Under Tank Irrigation Systems in Tamil Nadu.

Nanthakumaran, A.; Palanisami, K. (Faculty of Agriculture, University of Jaffna, Sri Lanka, 2010-06-02)

Excessive input usage by the farmers excepting to reap a higher cost of production ultimately leads to bring down their profit as well as wastage of scarce resources. The presence of shortfalls in efficiency means that ...
Assessment of the Potential of Groundwater Supplementation by Estimating the Stabilization Value of Tank Irrigation Systems in Tamil Nadu, India

Nanthakumaran, A.; Palanisami, K. (Postgraduate Institute of Agriculture, University of Peradeniya, 2011-01-10)

Irrigation tanks are one of the oldest and most important common property water resources in the resource poor regions especially in South India and Sri Lanka. Tank irrigation accounts for more than 30% of total irrigated ...

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