Author(s): Udayagee Kumarasinhe; Ken Kawamoto; Takeshi Saito; Yasuhide Sakamoto; M. I. M. Mowjood
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Abstract: Permeable reactive barriers systems are one of the effective and low cost treatment technique in contaminated groundwater treatment. The low cost and locally available reactive materials (soil, Biochar and brick) were collected from Sri Lanka and their long-term performance was evaluated using a column study in the treatment of Cd contaminated water. The materials were air dried, sieved and mixed into a pre-desired ratio and packed into the column uniformly to achieve 80% of degree of compaction. The Cd removal efficiency was evaluated attwo initial concentration as 30 and 300 ppm. The effluent was collected and the breakthrough curves were obtained for both Cd and Br-. The removal efficiency with C = 30 ppm reached almost 100% throughout thetested duration, while the removal efficiency with C =300 ppm reached 90% at the beginning and gradually reduced with the time. The hydraulic conductivity (K) of tested materials were obtained at different EC to observe the hydraulic properties of the tested materials. Results showed that a linear correlation between K and EC.
Year: 2018