Radiolysis of pentachlorophenol (PCP) in aqueous solution by gamma
radiation |
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Authors: | XUE Jun and WANG Jianlong |
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Institution: | Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, China |
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Abstract: | Steady-state radiolysis experiments were performed to investigate the y-irradiation treatment of pentachlorophenol (PCP) in aqueoussolution. The effect of initial concentration on the PCP degradation was also investigated. The experimental results showed that γ-irradiation was able to degrade PCP in aqueous solution successfully, and the radiolytical degradation process of PCP could be describedby the first-order kinetic model. When the initial concentration of PCP was 25 and 50 mg/L and the radiation dose was 4 and 6 kGy,respectively, the degradation efficiency was 100%. A luminescence bacterial test was used for evaluating the toxicity of the radiolyticintermediate products. Total detoxification of a 75 mg/L PCP solution could be achieved by carrying out the irradiation procedure at the dose of 15 kGy. |
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Keywords: | ionizing irradiation pentachlorophenol (PCP) kinetics dechlorination toxicity |
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