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Toxicity Reduction of Wastewater from a Rubber Products Manufacturing Factory by Gamma-ray Treatment  

Park, Eun-Joo (Division of Environmental Science & Ecological Engineering, Korean University)
Jo, Hun-Je (Division of Environmental Science & Ecological Engineering, Korean University)
Cho, Kijong (Division of Environmental Science & Ecological Engineering, Korean University)
Kim, Jeong-Gyu (Division of Environmental Science & Ecological Engineering, Korean University)
Jung, Jinho (Division of Environmental Science & Ecological Engineering, Korean University)
Publication Information
Journal of Korean Society on Water Environment / v.22, no.5, 2006 , pp. 913-918 More about this Journal
Abstract
Both raw wastewater and effluent from a rubber products manufacturing factory were found to be toxic to Daphnia magna though the effluent satisfied current water quality standards. Thus, in order to reduce toxicity, advanced oxidation processes (AOPs) such as gamma-ray (${\gamma}-ray$) treatment and ozonation ($O_3$) were applied. A combined ${\gamma}-rays/O_3$ treatment at 20 kGy after coagulation significantly reduced toxicity of raw wastewater, changing 48-h toxic unit (TU) value from 201.21 to 23.92. However, toxicity of treated water was higher than that of effluent (TU = 12.15). This shows limitation of gamma-ray treatment to remove toxicity of raw wastewater. In case of effluent, the combined ${\gamma}-rays/O_3$ treatment at 20 kGy efficiently decomposed toxic compounds down to non toxic level. This work strongly supports the necessity of toxicity reduction evaluation as well as toxicity-based effluent management.
Keywords
Acute toxicity; Daphnia magna; Gamma-rays; Ozone; Wastewater;
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Times Cited By KSCI : 1  (Citation Analysis)
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