University of Colombo

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Browsing University of Colombo by Author "BELING, AS"

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    Analysis of heavy metal content of the water waters/sludge of the sewage treatment plant at Biyagama export processing zone.
    (University of Colombo: UC(SCI)., 1996) BELING, AS
    The effluents and sludge discharhed by the industries and common sewage Treatment plant (SCTP) within the Biyagema Export processing Zone (BEPZ) were analysed for heavy metals with a view to identify ehether any wastes are being discharged by the BEPZ in hazardous concentretion with regard to heavy metals. The heave metal content in the effluents was compared with the standards specified by the Board of Investment of Sri Lanka (BOI) with regard to effluent discharge and the leachable heave metal content in the sludge was compared with the standards specified by the United states Environmental protection Agency (USEPA) for solid waste disposal by landfill, Duration of the study was from June 1994 to December 1994. The sludge was analysed for leaqchable and total heavy metal content. The leachable metal in the sludge, was analysed using the Toxicity Characteristic Leaching procedure (TCLP) test as recommended by the determined using an atomic absorption spectrophotometer as the detection limits of this equipment for each metal analysed are lesser than those specified in the standards. The effluents were analysed for cadmium, Chromium, copper, Nickel, Lead and Zinc content. The sludge was analysed for the same metals except for Nickel. In the USEPA standards, a tolerance limit has not been specified for Nickel. All the effluents and sludge samples....