Sepiolite, a natural nano-material, was chosen as a carrier to prepare supported nanoscale zero-valent iron (nZVI). The effects of preparation conditions, including mass ratio of nZVI and activated sepiolite and preparation pH value, on properties of the supported nZVI were investigated. The results showed that the optimal mass ratio of nZVI and sepiolite was 1.12:1 and the optimal pH value was 7. The supported nZVI was characterized by X-ray diffraction (XRD), transmission electron microscope (TEM) and energy dispersive spectrometer (EDS), and furthermore an analogy model of the supported nZVI was set up. Compared with the nZVI itself, the supported nZVI was more stable in air and possessed better water dispersibility, which were beneficial for the degradation of bromamine acid aqueous solution. The degradation characteristics, such as effects of supported nZVI dosage, initial concentration and initial pH value of the solution on the decolorization efficiency were also investigated. The results showed that in an acidic environment the supported nZVI with a dosage of 2 g/L showed high activity in the degradation of bromamine acid with an initial concentration of 1,000 mg/L, and the degree of decolorization could reach up to 98%.
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Research Article|
December 01 2012
Degradation of bromamine acid by nanoscale zero-valent iron (nZVI) supported on sepiolite
Xuening Fei;
1Department of Environmental and Municipal Engineering, Tianjin Institute of Urban Construction (TJUCI), Street: No. 26 Jinjing Road, Xiqing District, Tianjin 300384, China
2Tianjin Key Laboratory of Water Quality Science and Technology, TJUCI, Street: No. 26 Jinjing Road, Xiqing District, Tianjin 300384, China
E-mail: xueningfei888@163.com
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Lingyun Cao;
Lingyun Cao
1Department of Environmental and Municipal Engineering, Tianjin Institute of Urban Construction (TJUCI), Street: No. 26 Jinjing Road, Xiqing District, Tianjin 300384, China
2Tianjin Key Laboratory of Water Quality Science and Technology, TJUCI, Street: No. 26 Jinjing Road, Xiqing District, Tianjin 300384, China
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Lifeng Zhou;
Lifeng Zhou
1Department of Environmental and Municipal Engineering, Tianjin Institute of Urban Construction (TJUCI), Street: No. 26 Jinjing Road, Xiqing District, Tianjin 300384, China
2Tianjin Key Laboratory of Water Quality Science and Technology, TJUCI, Street: No. 26 Jinjing Road, Xiqing District, Tianjin 300384, China
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Yingchun Gu;
Yingchun Gu
1Department of Environmental and Municipal Engineering, Tianjin Institute of Urban Construction (TJUCI), Street: No. 26 Jinjing Road, Xiqing District, Tianjin 300384, China
3Department of Materials Science and Engineering, TJUCI, Tianjin 300384, China
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Xiaoyang Wang
Xiaoyang Wang
1Department of Environmental and Municipal Engineering, Tianjin Institute of Urban Construction (TJUCI), Street: No. 26 Jinjing Road, Xiqing District, Tianjin 300384, China
2Tianjin Key Laboratory of Water Quality Science and Technology, TJUCI, Street: No. 26 Jinjing Road, Xiqing District, Tianjin 300384, China
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Water Sci Technol (2012) 66 (12): 2539–2545.
Article history
Received:
May 04 2012
Accepted:
July 02 2012
Citation
Xuening Fei, Lingyun Cao, Lifeng Zhou, Yingchun Gu, Xiaoyang Wang; Degradation of bromamine acid by nanoscale zero-valent iron (nZVI) supported on sepiolite. Water Sci Technol 1 December 2012; 66 (12): 2539–2545. doi: https://doi.org/10.2166/wst.2012.478
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