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| Boron doped zero valent iron activates persulfate to degrade atrazine in water |
| Received:July 16, 2024 |
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| KeyWord:boron doped zero valent iron;atrazine;persulfate;advanced oxidation |
| Author Name | Affiliation | E-mail | | ZHANG Zihe | Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China | | | WANG Nana | Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China | | | ZHANG Yuhe | Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China | | | XU Ximeng | Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China | ximeng-Xu@kust.edu.cn |
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| Abstract: |
| In order to address the water pollution caused by the widespread use of atrazine（ATZ）, this study prepared boron doped zero valent iron（B-ZVI）by reducing Fe2O3 with sodium borohydride, and activated persulfate（PDS）to remove ATZ from water, explored the effects of PDS dosage, B-ZVI dosage, initial pH value of the solution, coexisting ions, and actual water on ATZ degradation. The results showed that the degradation of ATZ followed quasi first order reaction kinetics. Under the conditions of 25 ℃, ATZ concentration of 22 mg·L-1, B-ZVI dosage of 0.3 mg·L-1, PDS dosage of 2.02 g·L-1, and initial pH of 6.0, the removal rate of ATZ reached 97.9% in 15 minutes. The free radical quenching experiment and electron paramagnetic resonance（EPR）experiment confirmed that sulfate radical and hydroxyl radical were the dominant reactive oxygen species for degrading ATZ. The activation reaction of PDS included both homogeneous and heterogeneous processes, and doped boron could simultaneously promote the Fe（Ⅱ）/Fe（Ⅲ）cycling reaction between the solution and the catalyst surface, thereby accelerating the degradation of ATZ by PDS activation. |
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