Radiolysis of pentachlorophenol (PCP) in aqueous solution by gamma radiation.
Steady-state radiolysis experiments were performed to investigate the y-irradiation treatment of pentachlorophenol (PCP) in aqueous solution. The effect of initial concentration on the PCP degradation was also investigated. The experimental results showed that gamma-irradiation was able to degrade PCP in aqueous solution successfully, and the radiolytical degradation process of PCP could be described by 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 radiolytic intermediate 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.
Xue
Jun
J
Laboratory of Environmental Technology, INET Tsinghua University, Beijing 100084, China. xuejun97@mails.tsinghua.edu.cn
Wang
Jianlong
J
D000042:Absorption; D002713:Chlorine / Q000737:chemistry; D004785:Environmental Pollutants / Q000737:chemistry* / Q000528:radiation effects* / Q000633:toxicity; D005720:Gamma Rays; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008826:Microbial Sensitivity Tests; D010416:Pentachlorophenol / Q000032:analysis / Q000737:chemistry* / Q000528:radiation effects* / Q000633:toxicity; D011854:Radiochemistry; D012996:Solutions; D018675:Toxicity Tests; D014867:Water / Q000737:chemistry*
D004785:Environmental Pollutants; D012996:Solutions; D014867:Water; D002713:Chlorine; D010416:Pentachlorophenol