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Photo-assisted fenton mineralization of an azo-dye acid black 1 using a modified laponite clay-based Fe nanocomposite as a heterogeneous catalyst

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Abstract

Photo-assisted Fenton mineralization of an azo-dye Acid Black 1 (AB1) was studied in detail using a modified laponite clay-based Fe nanocomposite (Fe-Lap-RD) as a heterogeneous catalyst in the presence of H2O2 and UV light. The Fe-Lap-RD was characterized by X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF), X-ray photoelectron spectroscopy (XPS), and N2 adsorption. The effects of reaction parameters such as initial AB1 concentration, H2O2 concentration, Fe-Lap-RD catalyst loading, initial solution pH, UV light wavelength and power, and reaction temperature on the mineralization of AB1 were investigated. Under the optimal reaction conditions (6.4 mM H2O2, 1.0 g Fe-Lap-RD/L, 8 W UVC, initial solution pH=3.0), complete discoloration and over 90% total organic carbon (TOC) removal of 0.1 mM AB1 were achieved after 90 min reaction. Discoloration kinetics of AB1 was also studied to obtain apparent reaction rate constants and reaction activation energy.

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Authors and Affiliations

  1. Environmental Engineering Program, Hong kong University of science and Technology, Clear Water Bay, Kowloon, Hong kong

    Oliver Sze Nga Sum

  2. Department of Chemical Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong

    Jiyun Feng, Xijun Hub & Po Lock Yue

Authors
  1. Oliver Sze Nga Sum
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  2. Jiyun Feng
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  3. Xijun Hub
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  4. Po Lock Yue
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Correspondence to Xijun Hub.

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Sum, O.S.N., Feng, J., Hub, X. et al. Photo-assisted fenton mineralization of an azo-dye acid black 1 using a modified laponite clay-based Fe nanocomposite as a heterogeneous catalyst. Top Catal 33, 233–242 (2005). https://doi.org/10.1007/s11244-005-2532-2

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