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Browsing Department of Limnology and Water Technology by Issue Date

Browsing Department of Limnology and Water Technology by Issue Date

Now showing items 1-20 of 41

Photodegradation of 3,4-dichloropropionamide in aqueous TiO2 suspensions

Maithreepala, R.A.; Pathirana, Hema M.K.K. (Elsevier, 1997-01-22)

Results of the photodegradation of 3,4-DPA in the presence of TiO2 are discussed. 100% destruction of an aqueous solution of 3,4-DPA (265 ppm) occurred within 5 h when illuminated with a medium pressure lamp (λ ≈ 365 nm) ...
Heterogeneous and homogeneous photocatalytic degradation of chlorophenols in aqueous titanium dioxide and ferrous ion

Doong, R-A.; Maithreepala, R.A.; Chang, S-M. (IWA, 2000-10)

Photocatalytic degradation of 100 mg/l chlorophenols was studied using TiO2 and Fenton reagent as catalysts. 2-chlorophenol, 4-chlorophenol, and 2,4-dichlorophenol were selected as the target compounds. Results showed ...
The influence of pH and cadmium sulfide on the photocatalytic degradation of 2-chlorophenol in titanium dioxide suspensions

Doong, Ruey-an; Chen, Chih-hua (Elsevier, 2001-08)

The influence of pH and cadmium sulfide on the photocatalytic degradation of 2-chlorophenol (2-CP) in titanium dioxide suspensions was investigated to evaluate the feasibility of mixed semiconductors on the photodegradation ...
Synergistic Effect of Copper Ion on the Reductive Dechlorination of Carbon Tetrachloride by Surface-Bound Fe(II) Associated with Goethite

Maithreepala, R.A .; Doong, Ruey-an (Environmental Science & Technology, 2004)

The dechlorination of carbon tetrachloride (CT) by Fe(II) associated with goethite in the presence of transition metal ions was investigated. X-ray photoelectron spectroscopy (XPS) and X-ray powder diffraction (XRPD) ...
Enhanced remediation of carbon tetrachloride by Fe(II)-Fe(III) systems in the presence of copper ions

Maithreepala, R.A.; Doong, R.-A. (PubMed, 2004)

The effect of Cu(II) ion on the dechlorination of carbon tetrachloride (CT) by Fe(II) associated with various iron oxides was investigated. Iron oxides including goethite, hematite, ferrihydrite and magnetite were selected ...
Reductive Dechlorination of Carbon Tetrachloride in Aqueous Solutions Containing Ferrous and Copper Ions

Maithreepala, R. A.; Doong, Ruey-an (ACS Publication, 2004-12-15)

Fe(II) associated with iron-containing minerals has been shown to be a potential reductant in natural subsurface environments. While it is known that the surface-bound iron species has the capacity to dechlorinate various ...
Coupled Transformation of Carbon Tetrachloride and Copper Ion by Nanocrystalline Ferric Oxides and Ferrous Ions

Doong, Ruey-an; Maithreepala, R.A.; Chang, Sue-min (Coupled Transformation of Carbon Tetrachloride and Copper Ion by Nanocrystalline Ferric Oxides and Ferrous Ions, 2005)

The transformation of carbon tetrachloride (CT) and copper ions by Fe(II) ions associated with nanocrystalline iron oxides minerals including hematite (α-Fe2O3) and ferrihydrite (Fe(OH)3) was investigated. Experiments ...
Enhanced Dechlorination of Chlorinated Methanes and Ethenes by Chloride Green Rust in the Presence of Copper(II)

Maithreepala, R. A.; Doong, Ruey-an (ACS Publication, 2005-04-26)

The enhanced removal of carbon tetrachloride (CCl4), tetrachloroethene (C2Cl4), and trichloroethene (C2HCl3) by chloride green rust (GR(Cl)) in the presence of copper ions was investigated. X-ray powder diffraction (XRPD) ...
Dechlorination of Chlorinated Methanes by Ferrous Ion Associated with Various Iron Oxide Minerals

Maithreepala, R.A.; Doong, Ruey-an (Journal of Environmental Engineering and Management, 2006)

The dechlorination of carbon tetrachloride (CT) by Fe(II) ion in the suspensions of crystalline iron oxide minerals including goethite (α-FeOOH), hematite (α-Fe2O3), magnetite (Fe3O4), and amorphous ferrihydrite (Fe(OH)3) ...
Effect of biogenic iron species and copper ions on the reduction of carbon tetrachloride under iron-reducing conditions

Maithreepala, R.A.; Doong, Ruey-an (Chemosphere, 2008)

In this study, the cell-mediated and abiotic reduction of carbon tetrachloride (CCl4) by biogenic iron species produced from the reductive dissolution of ferrihydrite in the presence of Geobacter sulfurreducens and copper ...
Transformation of carbon tetrachloride by biogenic iron species in the presence of Geobacter sulfurreducens and electron shuttles

Maithreepala, R.A.; Doong, Ruey-an (Elsevier, 2009-05-15)

The transformation of carbon tetrachloride (CT) by biogenic iron species produced from the bioreduction of various Fe(III) oxides in the presence of Geobacter sulfurreducens and electron shuttles were investigated. Cysteine ...
Degradation of Chlorinated Hydrocarbons by Fe(II) Species: Influence of Cu ions on the dichlorination reaction and modification of mineral surfaces

Maithreepala, R.A. (LAP LAMBERT Academic Publishing, 2013)

Redox processes at the mineral-water interfaces under sub-surface conditions play a vital role in deciding the fate of reducible contaminants in groundwater. Oxidation of surfae-bound and/or structural Fe(II) species ...
The benthic macro-invertebrate diversity in relation to water quality of a stream habitat at Dediyagala, Sri Lanka

Madhushankha, H.M.T.C.; Asanthi, H.B.; Maithreepala, R.A. (Sri Lanka Journals Online, 2014)

The streams collect sediment and other fine and particulate material from their watersheds and transport them downstream as fluvial material. Macro-benthos is the most important secondary producers in stream ecosystem ...
Ornamental fish trade in Sri Lanka: an economic perspective

Herath, H.M.T.N.B.; Wijewardene, L. (International Science Community Association, 2014)

Exporting of ornamental fish is much lucrative industry in today. Sri Lanka is one of the important country in that context by having significant market share in world trade. In this paper an economic assessment of ...
Growth and stress responses of Nuttall’s waterweed Elodea nuttallii (Planch) St. John to water movements.

Atapaththu, K.S.S.; Asaeda, T. (Springer, 2014-12-23)

Understanding the interactions between aquatic plants and environmental factors is important to clarify aquatic ecosystem functioning. The mechanisms governing the interactions between water flow and plants are not yet ...
Effects of water turbulence on variations in cell ultrastructure and metabolism of amino acids in the submersed macrophyte, Elodea nuttallii (Planch.) H. St. John

Atapaththu, K.S.S.; Miyagi, A.; Atsuzawa, K.; Kaneko, Y.; Kawai-Yamada, M.; Asaeda, T. (Willey, 2015-05-06)

The interactions between macrophytes and water movement are not yet fully understood, and the causes responsible for the metabolic and ultrastructural variations in plant cells as a consequence of turbulence are largely ...
Growth and Oxidative Stress of Brittlewort (Nitella pseudoflabellata) in Response to Cesium Exposure.

Atapaththu, K.S.S.; Rashid, M.H.; Asaeda, T. (Springer, 2016-01-18)

The present study evaluated the impact of cesium ((133)Cs) at four concentrations (0, 0.001, 0.01, and 0.1 mg L(-1)) on growth, concentrations of chlorophyll and carotenoid pigments, and oxidative stress responses in the ...
Drawbacks of mangrove rehabilitation schemes: Lessons learned from the large-scale mangrove plantations

Barnuevo, A.; Asaeda, T.; Sanjaya, K.; Kanesaka, Y.; Fortes, M. (Elsevier, 2017-02-12)

Mangrove rehabilitation programs received much attention in the past decades as a response to widespread global degradation. While the documented successes and failures of mangrove rehabilitation accomplishments were varied, ...
Assessment of water quality and trophic state in Sooriyawewa reservoir in the Southern province of Sri Lanka

Wijewardene, L.; Asanthi, H. B.; Rajapaksha, S. W. (Sri Lanka Association of Fisheries and Aquatic Resources, 2017-03-01)

Trophic state of a reservoir is one of the important factors in limnological perspective in order to understand its healthiness. This study was focused to understand the dynamics of trophic state and water quality in ...
Effects of water turbulence on plant, sediment and water quality in reed (Phragmites australis) community.

Atapaththu, K.S.S; Asaeda, T.; Yamamuro, M.; Kamiya, H. (De Gruyter Open Ltd., 2017-03-21)

Even though the interaction between water movements and aquatic plant is crucial for the aquatic eco system management, the importance of water turbulence in this regard is not well documented. To add to our knowledge ...

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