By Ta Yeong Wu, Ningqun Guo, Chee Yang Teh, Visit Amazon's Jacqueline Xiao Wen Hay Page, search results, Learn about Author Central, Jacqueline Xiao Wen Hay,
Over the prior ten years, cutting edge applied sciences have proven that complicated oxidation approaches are hugely promising while utilized to the remediation of polluted water or wastewater as they don’t generate any sludge or reliable fabric of harmful nature.
Advances in Ultrasound expertise for Environmental Remediation experiences the basics of ultrasound know-how and the state-of-the-art advancements in “ultrasound-based loose radical new release” in environmental remediation and toxins prevention. It additionally offers the demanding situations of introducing ultrasound expertise into large-scale environmental remediation functions and examines the equipment used to enhance ultrasound know-how. certainly, ultrasonic platforms are super delicate and liable to operational parameters which can't be managed with out a solid wisdom and realizing of actual and chemical phenomena.
Advances in Ultrasound know-how for Environmental Remediation good points the idea and basics of ultrasound expertise and discusses its capability in its place approach in environmental remediation.
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Extra resources for Advances in Ultrasound Technology for Environmental Remediation
2011b) Decolorization: *50 % Gao et al. (2011a) Cui et al. (2011) Decolorization: *60 % Decolorization: *46 % Chen et al. 7 % Reference Results 44 3 Applications of Ultrasound Technology 20 mg/L 10 mg/L Ultrasound ? TiO2 Ultrasound ? UV ? TiO2 ? electro-assisted Ultrasound ? Zirconia nanotubes (absorption) Ultrasound ? Er3+: YAlO3/TiO2-ZnO Acid Orange 52 (Methyl Orange) Acid Orange 52 (Methyl Orange) Acid Orange 52 (Methyl Orange) Acid Orange 7 10 mg/L 25 mg/L Wang et al. (2008a) He et al. (2011) Reference (continued) Gao et al.
UV ? 9 % Results 200 mg/L Ultrasound ? electrochemical oxidation ? 3 g/L Fe2O3/SBA-15, 8 mM H2O2 Acid Orange 7 Ultrasound ? UV ? Fe2O3/SBA-15 ? H2O2 Acid Orange 7 Ultrasound ? Fe2O3-Al2O3-meso ? H2O2 Acid Orange 7 Ultrasound ? Goethite ? H2O2 Acid Orange 7 Ultrasound ? Fe0 ? H2O2 Reference (continued) Zhong et al. (2011b) Zhong et al. (2011a) Zhang et al. (2009a) Zhang et al. (2009b) Decolorization rate Liu et al. 02 9 10-2 min-1 TOC degradation: 57 % TOC degradation: *100 % Zhang et al. (2008a) Results Acid Orange 7 Ultrasound ?
A study on different poly(alkyl methacrylates) was also conducted by Daraboina and Madras (2009). They showed that the rate coefficient increased with increasing number of atoms in the alkyl group and in their experiment, the order of degradation was PBMA [ poly(ethyl methacrylate) (PEMA) [ PMMA. During ultrasonication, the movement of main chain in the polymer increases with the length of side chain, leading to molecular chain scission in the main chain of the polymer. During the ultrasonication of PBMA, an addition of different initiators (benzoyl peroxide, dicumyl peroxide, and azobisisobutyronitrile) was found to exhibit a negative effect because these initiators interacted with the polymer radicals to form stable polymer, resulting a lower degradation efficiency (Daraboina and Madras 2009).