Abstract
ABSTRACTThe contamination of fresh water by organic pollutants released from petroleum sludge was investigated. A diffusion model was proposed to predict the concentration of total organic pollutants with respect to water-sludge contacting time. Results indicated that all fresh water samples were polluted seriously after 12 h contacting and the total organic pollutants quantified by chemical oxygen demands (CODs) were inverse proportional to the stability of sludge emulsion. The highest COD value was over 1000 mg/L after 48 h of contact. The diffusion velocity of organic pollutants increased with the enlargement of water-sludge contact area.
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