Department of Environmental and Biological Engineering, Wuhan Technology and Business University, Wuhan, People's Republic of China.
Junji Environmental Technology Co., Ltd., Wuhan, People's Republic of China.
Environ Technol. 2023 Oct;44(24):3676-3684. doi: 10.1080/09593330.2022.2068383. Epub 2022 May 4.
The dechlorination of 2,4-dichlorophenol (2,4-DCP) by a nanoscale Fe/Ni material was investigated at room temperature. 2,4-DCP can be removed more quickly by an Fe/Ni material with 2% Ni. Fe/Ni exhibited excellent adsorption and reduction efficiency toward 2,4-DCP in an aqueous solution over a wide range of pH values. The removal rate of 2,4-DCP exceeded 95% in 60 min in the pH range of 3.0-9.0, and more than 75% was dechlorinated to phenol (CA). The degradation pathway of 2,4-DCP was confirmed based on analysis of the intermediate and end products. A portion of 2,4-DCP was first dechlorinated with a chlorine atom to produce 2-chlorophenol and 4-chlorophenol, and then dechlorination was performed sequentially to form CA. The other portion of 2,4-DCP was dechlorinated to remove two chlorine atoms simultaneously to generate CA. The investigations are essential to the application of iron-based remediation technology.
采用纳米尺度的 Fe/Ni 材料在室温下研究了 2,4-二氯苯酚（2,4-DCP）的脱氯反应。在较宽的 pH 值范围内，2%Ni 的 Fe/Ni 材料能更快速地去除 2,4-DCP。Fe/Ni 在水溶液中对 2,4-DCP 表现出优异的吸附和还原效率。在 pH 值为 3.0-9.0 的范围内，2,4-DCP 的去除率在 60 分钟内超过 95%，超过 75%的 2,4-DCP 被脱氯生成苯酚（CA）。通过对中间产物和最终产物的分析，确定了 2,4-DCP 的降解途径。一部分 2,4-DCP 首先脱氯生成 2-氯苯酚和 4-氯苯酚，然后逐个脱氯生成 CA。另一部分 2,4-DCP 脱氯同时去除两个氯原子生成 CA。这些研究对于铁基修复技术的应用至关重要。
