B.G.N. SewwandiUniversity of Kelaniya · Zoology and Environmental Management
B.G.N. Sewwandi
PhD, MPhil, BSc.
About
17
Publications
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121
Citations
Citations since 2017
Introduction
Additional affiliations
March 2019 - present
September 2016 - March 2019
August 2015 - September 2016
Publications
Publications (17)
Open dumping of municipal solid waste (MSW) is the most common way of handling solid waste in Sri Lanka due to high cost involved with advanced technologies for landfilling, lack of technical capacity, lack of know-how to manage landfill sites, and so on. Landfill leachate generated from the MSW landfill sites must be treated before dispose into th...
Environmental pollution due to landfill leachate has been studied extensively for inorganic and organic pollutants. This study investigates the risk of soil and water pollution by heavy metals in leachate from a selected landfill in Gampola, Sri Lanka. Leachate and soils from the landfill were collected and analyzed for heavy metals and quality rat...
Dissolved oxygen (DO) concentration affects the treatment processes in constructed wetlands. This study examined the dissolved oxygen dynamics and total nitrogen removal in constructed wetlands with submerged and floating plants. Four constructed wetland units each with the surface area of 3 x 1 m<sup>2</sup> were constructed at University of Perad...
This study was conducted to characterize the adsorption of Cd2+ and Pb2+ by raw coconut husk (RCH) and humic acid-treated coconut husk (HACH). Grounded and sieved coconut husk (CH) from Sri Lanka was treated with humic acid to use as the adsorbent in laboratory experiments. Capacities of HACH and RCH for adsorption of Cd2+ and Pb2+ at different pH,...
This study was conducted in order to understand the mechanism
of Cd and Pb adsorption in aqueous solutions by raw and modified saw dust
(SD) of Alstonia macrophylla. The biosorbent was characterized by Boehm titration,
specific surface area, scanning electron microscopy (SEM), X-ray energy
dispersion (EDAX), and Fourier transform infrared (FTIR) an...
Lead (Pb2+) is a critical pollutant that causes serious health issues such as cancers. It is also bioaccumulated through food chains affecting the ecosystem health. Drinking water treatment plant residues are being produced in large quantities in drinking water treatment plants and disposed on landfills exacerbating solid waste problems. Adsorption...
Water pollution by heavy metals is a critical environmental issue that causes the deterioration of both human and ecosystem health. Cadmium (Cd 2+) is a heavy metal that is non-biodegradable and bioaccumulated through food chains. It also acts as a severe human carcinogen. Adsorption is an effective wastewater treatment method for removing heavy me...
Quantification of environmental pollution risk (EPR) induced by open dumping practice of municipal solid waste (MSW) is important to improve MSW management practices and to provide effective countermeasures for mitigating EPR at the MSW open dumping site. This study targeted an open dumping site at Karadiyana, Western province of Sri Lanka and aime...
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...
Climate change is one of the most widely researched and discussed topical problems affecting many sectors specially agriculture. Sri Lanka's economy is heavily dependent on agriculture which employs a large percentage of the population. Developing countries are more vulnerable to climate change, as they will be the most affected, but have the minim...
: Landfill leachate generated pollutes the underlined groundwater and nearby surface water bodies due to the unlined and unmanaged dumpsites. Leachate pollution index (LPI) can be used to quantify and compare the leachate contamination potential of a particular landfill site at a given time. A study is conducted to evaluate the contamination potent...
Landfill leachate contains different types of pollutants, organic, inorganic pollutants and heavy metals. A research was conducted to study the impact of landfill leachate on environment from municipal solid waste dumpsites in Sri Lanka. The objective of the study was to study the impact of landfill leachate on environmental pollution by quantifyin...
Open dumping of Municipal Solid Waste (MSW) is a common practice and identified as a source of pollution for surface and groundwater resources in Sri Lanka. The objective of this study was to identify the heavy metals in leachate and soils in the vicinity of MSW dump site and to assess locally available agricultural waste materials to use as adsorb...
The effects of coconut coir-pith as an alternative substrate material in submerged macrophyte wetland
systems were investigated in three similar pilot-scale wetlands (WL1, WL2 and WL3) planted with
Hydrilla verticillata. The substrate layers of WL1 and WL3 were river sand and coconut coir-pith, respectively,
whereas that of WL2 was a mixture of riv...
Impacts of surplus organic carbon from coconut coir-pith as an alternative substrate material of submerged wetland systems was investigated in three similar Lysimeters (L 1 , L 2 , and L 3), planted with Hydrilla verticillata. The substrate layer of L 1 and L 3 were amended with river sand and coconut coir-pith respectively, while the L 2 was upgra...
Projects
Projects (3)
To bring the stakeholders and experts at national and international levels together to share experience and work out strategic Science &Technology interventions to mitigate hazards due to extreme natural events.
for more details visit,
http://www.seu.ac.lk/irene2017/index.php
We take great pleasure in announcing the call for research papers to our 7th International Symposium 2017 (IntSym-2017) organized by South Eastern University of Sri Lanka.
The objective of the IntSym-2017 is to provide a common platform to the researchers and practitioners from both academia as well as industry to share their research findings and the latest development in their field of study.
For more details please spare your time to access our website: http://www.seu.ac.lk/intsym2017/
For online submission visit : http://www.seu.ac.lk/intsym2017/submission.php
Enquiries : intsym2017@seu.ac.lk
We would be delighted to have you presenting your research papers at this symposium scheduled on that date at South Eastern University of Sri Lanka.
Submission on or before 11th September 2017
We would be much obliged to you, if you would circulate this message to your research network, colleagues and encourage them to submit their full papers to this symposium.
