Department of Bioenvironmental Chemistry, Chonbuk National University, Jeonju, 561-756, Republic of Korea.
Environ Sci Pollut Res Int. 2015 Jul;22(13):9637-45. doi: 10.1007/s11356-015-4123-5. Epub 2015 Jan 25.
Electron beam irradiation has shown potential as an alternative process for the treatment of industrial effluents that contain toxic organic chemicals. This study investigated the effectiveness of electron beam in degrading chloramphenicol (CAP) in aqueous solution. The degradation efficiency was 32.4% at 1 kGy, 86.9% at 5 kGy, and 100% at 10 kGy. The total organic carbon (TOC) of CAP in aqueous solution declined 4.6% at 1 kGy, 12.1% at 5 kGy, and 17.1% at 10 kGy of irradiation with electron beam. The CAP degradation products after irradiation were CAP1 ([M + H] m/z 307.1), CAP2 ([M + H] m/z 291.1), and CAP3 ([M + H] m/z 321.1). The degradation products were tested for microbial toxicity against Escherichia coli, Pseudomonas putida, and Bacillus subtilis and did not show any toxic antimicrobial effects caused by the CAP degradation products after irradiation with electron beam. The results of this study suggest that electron beam irradiation is the best technology for the comprehensive treatment of veterinary antibiotics at wastewater treatment plants.
电子束辐照已显示出作为处理含有有毒有机化学品的工业废水的替代工艺的潜力。本研究考察了电子束在降解水溶液中氯霉素（CAP）方面的有效性。在 1 kGy 时，降解效率为 32.4%，在 5 kGy 时，降解效率为 86.9%，在 10 kGy 时，降解效率为 100%。在电子束辐照下，CAP 在水溶液中的总有机碳（TOC）下降了 4.6%（1 kGy）、12.1%（5 kGy）和 17.1%（10 kGy）。辐照后的 CAP 降解产物为 CAP1([M+H]m/z 307.1)、CAP2([M+H]m/z 291.1)和 CAP3([M+H]m/z 321.1)。对大肠杆菌、铜绿假单胞菌和枯草芽孢杆菌进行了微生物毒性测试，结果表明，辐照后的 CAP 降解产物对电子束辐照后的 CAP 降解产物没有任何有毒的抗菌作用。这项研究的结果表明，电子束辐照是处理污水处理厂中兽用抗生素的最佳综合处理技术。
