Browsing by Author "Weerasooriya, S.V.R."
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Item Baseline values of cadmium and Zinc in three land uses in a selected mapping unit of the dry zone of Sri Lanka(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2013) Sanjeevani, U.K.P.S.; Indraratne, S.P.; Weerasooriya, S.V.R.; Vitharana, U.W.A.Item Characterization of an alfisol collected from dry zone of Sri Lanka to elucidate the retention mechanisms of pollutants(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2013) Sanjeevani, U.K.P.S.; Indraratne, S.P.; Weerasooriya, S.V.R.; Vitharana, W.A.U.Item Concentrations of trace metals in selected land uses of a dry zone soil catena of Sri Lanka(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2014) Rosemary, F.; Vitharana, U.W.A.; Indraratne, S.P.; Weerasooriya, S.V.R.Item Geochemical evidence for palaeo-environments of algal mats and peat in Sri Lanka(National Science Council:Colombo, 1983) Dissanayake, C.B.; Senaratne, A.; Weerasooriya, S.V.R.; Wannigama, G.P.Item A geochemistry classification of groundwater of Sri Lanka(National Science Council:Colombo, 1985) Dissanayake, C.B.; Weerasooriya, S.V.R.Item The hydrogeochemical atlas of Sri Lanka(NARESA:Colombo; 106p, 1985) Dissanayake, C.B.; Weerasooriya, S.V.R.Item Use of minerals in the degradation of organic pollutants from aquatic systems(University of Peradeniya. Peradeniya, 1995) Weerasooriya, S.V.R.; Senaratne, A.This paper reports the potential use of mineral surfaces, particularly of iron oxides, as a starting material for the mineralization of chlorinated organic pollutants from aquatic systems. The overall mineralization of rate of CCl4 was optimal at pH 3 when goethite suspensions were utilized in the degradation process. The apparent coverage of the reactive surface sites by various contaminants has been attributed to the reduced reactivities of surface sites when pH exceeds 6.5. In order to enhance the mineralization rate of organic pollutants at environmentally significant acidity conditions, the reactive sites of goethite surfaces were first activated with a coating of Fe(II). The observed rate of mineralization of CCl4 was increased by an order magnitude when the chemical reaction was conducted in the presence of Fe(II)-coated goethite with a pH range of 4 to 7.