期刊
CHEMOSPHERE
卷 266, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2020.128976
关键词
Fe/Ni nanoparticles; Polystyrene resin; 2, 4-DCP; Dechlorination
资金
- Key Projects of Enterprise and University Cooperation in Fujian [2018Y4010]
- Science and Technology Major Project of the Bureau of Science and Technology of Xiamen [3502Z20191012]
- Quanzhou City Sciences & Technology Program of China [2018C082R]
- Subsidized Project for Postgraduates' Innovative Fund in Scientific Research of Huaqiao University
Fe/Ni-D072 bimetallic nanoparticles supported on polystyrene cation exchange resin showed promising performance in removing 2,4-DCP. The study investigated the effects of various factors on the removal efficiency and identified Fe/Ni-D072 as a potential catalyst for chlorophenol removal with great application prospects in groundwater remediation.
2,4-dichlorophenol (2,4-DCP) is a typical chlorophenol that has been widely used in industrial production and caused serious pollution to the environment. In this study, the performance of Fe/Ni bimetallic nanoparticles supported on polystyrene cation exchange resin (Fe/Ni-D072) to remove 2,4-DCP was evaluated. The effects including the doping amount of Ni, the dosage of Fe/Ni-DCP, the initial concentration of 2,4-DCP, and pH value of the solution on the removal efficiency were also investigated. The results showed that when the initial concentration of 2,4-DCP was 20 mg/L and pH = 7.3, 90% of 2,4-DCP could be dechlorinated by Fe/Ni-D072 (Ni% = 30 wt%, dosage: 6.7 g/L) after 12 h reaction. The dechlorination process followed a pseudo-first-order model, and the reaction constant was 0.252 h(-1). In addition, the effects of humic acid and common coexisting ions on dechlorination were studied. The results showed that humic acid with a low concentration (5 mg/L) and CO32- restrained the degradation of 2,4-DCP. The dechlorination products of 2,4-DCP were identified by HPLC and the result showed phenol was the main product with a slight amount of 2-CP as the dechlorination intermediate, and 4-CP was barely detected. These results suggest that Fe/Ni-D072 was a promising catalytic material for the removal of chlorophenol and has great application prospects in groundwater remediation. (C) 2020 Elsevier Ltd. All rights reserved.
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