King Abdulaziz City for Science and Technology - KACST, Nuclear Science Research Institute, National Center for Irradiation Technology (NCIT), P. O. Box 6086, Riyadh, 11442, Saudi Arabia; Industrialization and Innovation Affairs-IIA, Saudi-Chinese Centre for Technology Transfer (SCCTT), P. O. Box 6086, Riyadh, 11442, Saudi Arabia.
King Khalid Military Academy - KKMA, P. O. Box 22140, Riyadh, 11495, Saudi Arabia.
J Hazard Mater. 2019 Apr 15;368:569-577. doi: 10.1016/j.jhazmat.2019.01.090. Epub 2019 Jan 29.
Water radiolysis-induced destruction, dechlorination and mineralization of harmful chlorophenols, i.e., 2,4,6-trichlorophenol (2,4,6-tCPH), 4-chlorophenol (4-CPH) and 4-chlorocatechol (4-CC), using radioactive Co-60 have been investigated as individual and combination methods (2,4,6-tCPH+4-CPH+4-CC) with an initial concentration of 100 μM of each pollutant. The kinetic efficiencies of chlorophenol destruction were compared. The individual destruction percentages of 2,4,6-tCPH, 4-CPH and 4-CC reached at least 99% with absorbed doses (D) of 1.44, 1.73 and 1.85 kGy, respectively. Substantially higher absorbed doses were required to destroy each chlorophenol when they were all present in the treated. HCO- anions inhibit the elimination efficiency of chlorophenols. The effects of SO anions, NO and N on destruction and mineralization were elaborated. O was crucial for the mineralization. Except for the γ-ray/N system, full mineralization was achieved for both individual and combined chlorophenols. The results indicate that hydrated electrons (e) do not have a direct effect on the destruction of these chlorophenols. The study main goals were to show the successful application of ionizing radiation as a useful tool for environmental remediation, to continue scientific research on ionizing radiation as an advanced oxidation technology (AOT) and to provide a new, economic, practical and efficient solution to remove pollutants from aqueous media.
利用放射性 Co-60 对水中有害氯酚（即 2,4,6-三氯苯酚（2,4,6-tCPH）、4-氯苯酚（4-CPH）和 4-氯邻苯二酚（4-CC））进行水辐射分解、脱氯和矿化的研究，作为单独和组合方法（2,4,6-tCPH+4-CPH+4-CC）进行了研究，每种污染物的初始浓度为 100 μM。比较了氯酚破坏的动力学效率。在吸收剂量（D）分别为 1.44、1.73 和 1.85 kGy 的情况下，2,4,6-tCPH、4-CPH 和 4-CC 的个体破坏百分比均至少达到 99%。当它们全部存在于处理液中时，破坏每种氯酚所需的吸收剂量要高得多。HCO- 阴离子会抑制氯酚的消除效率。详细阐述了 SO 阴离子、NO 和 N 对破坏和矿化的影响。O 对矿化至关重要。除了γ射线/N 体系外，单独和组合氯酚均实现了完全矿化。结果表明，水合电子（e）对这些氯酚的破坏没有直接影响。本研究的主要目的是展示电离辐射作为环境修复有用工具的成功应用，继续研究电离辐射作为一种先进氧化技术（AOT），并为从水介质中去除污染物提供一种新的、经济、实用和有效的解决方案。
