IPRC - 2017
Permanent URI for this collectionhttp://repository.kln.ac.lk/handle/123456789/18564
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Item Assessments of Drinking Water Quality and Water Treatment Process in Kalatuwawa Reservoir in Sri Lanka.(In: Proceedings of the International Postgraduate Research Conference 2017 (IPRC – 2017), Faculty of Graduate Studies, University of Kelaniya, Sri Lanka., 2017) Premaratne, W.A.P.J.; Senarathne, K.S.D.Kalatuwawa is one of the major water treatment plants which supplies water to Colombo city and it‘s sub-urban. Raw and treated water samples were collected from the Kalatuwawa water treatment plant located at 6 85‘ latitude and 80 18‘ longitude. Both raw and treated water samples were analyzed ninety times within six months (15 days per months) from July to December 2016 for pH, turbidity, conductivity, color, hardness, alkalinity, aluminum, iron, manganese and ammonia. According to the experimental results, pH was in the range of 6.58.5 in the treated water. The conductivity values ranged from 20.5 to 34.5 μS cm- 1 in raw water and it was from 48.5 to 74.5 μS cm- 1 for treated water. The hardness value range was from 5.5 to 6.5 ppm (as CaCO3) for raw water and from 15.5 to 25.5 ppm (as CaCO3) for treated water. Raw water and treated water alkalinities were 7.0-8.5 ppm (as CaCO3) and 13.0-19.5 ppm (as CaCO3) respectively. Aluminum concentration in raw water was 0.02-0.05 ppm and it was 0.1-0.2 ppm in treated water. Ammonia concentration in raw water in Kalatuwawa varied from 0.02 to 0.09 ppm and the maximum value in treated water was 0.01 ppm. Iron concentration in raw water was 0.5-2.0 ppm and it was 0.05-0. 07 ppm in treated water. Average color of the raw water was detected as 39-83 Pt/Co units and after treatment process average color indicated as zero value Pt/Co units. Average turbidity value was from 0.2 to 2.5 NTU for treated water. Experimental data revealed that treated water from Kalatuwawa reservoir is in the limits of World Health Organization (WHO) standards for drinking water parameters indicating efficient, effective and productive water treatment process.Item Physicochemical Analysis of Ground Water Quality and Soil in Ja-Ela Area in Sri Lanka.(In: Proceedings of the International Postgraduate Research Conference 2017 (IPRC – 2017), Faculty of Graduate Studies, University of Kelaniya, Sri Lanka., 2017) Premaratne, W.A.P.J.; Anuruddha, I.G.G.U.Water pollution has become a common problem with the reduction of the availability of drinking fresh water resources. Hydrochemical parameters of groundwater and soil play a significant role in classifying and assessing the water quality. The objective of the present study is to ascertain the major ion chemistry of groundwater and soil in the Ja-Ela, Indiwita area in Sri Lanka. Water and soil samples were collected from 12 drinking water wells between 7 04‘ 29‖ to 7 04‘ 39‖ latitude and 79 53‘ 01‖ to 80 53‘ 04‖ longitude in the JaEla area. Each drinking water well was analysed six times within six months for pH, specific conductance, COD, hardness, and metals (using AAS method) including Al, Fe, Mn, Ca, Mg and Na. The observed physicochemical parameters of ground water were compared with World Health Organization Standards (WHO). According to the experimental results, all the ground water samples were appeared brownish colour with an odour. The observed pH values of all the water samples were ranged from 7.0 to 8.3. Aluminium content in the water samples was not in the detectable limits (<0.05 mg L-1) and the maximum iron content observed was 5.3 mg L-1. The maximum manganese content observed was 0.3 mg L- 1. Total magnesium and calcium contents were ranged from 42 to 581 as CaCO3 mg L-1. The majority water type in the study area was found to be Na-bicarbonate water type. Groundwater soil samples were analysed for pH, specific conductance, cation exchange capacity organic matters, mineral phases, and metals including Al, Fe, Mn, Ca, Mg and Na. Manganese content in soil was from 1.7 to 70.5 mg kg-1. Experimental data revealed that groundwater in studied area was not in the limits of WHO standards for drinking water parameters except the pH value and conductivity.