By a News Reporter-Staff News Editor at Journal of Technology -- New research on Hazardous Materials is the subject of a report. According to news reporting originating in Pingtung, Taiwan, by VerticalNews journalists, research stated, "This paper presents the electro-regeneration of Ce(IV) in real (hazardous) spent thin-film transistor liquid-crystal display (TFT-LCD) Cr-etching solutions. In addition to Ce(III) >Ce(IV) in diffusivity, a quasi-reversible behavior of Ce(III)/Ce(IV) was observed at both boron-doped diamond (BDD) and Pt disk electrodes."
The news reporters obtained a quote from the research from the National Pingtung University of Science and Technology, "The Ce(IV) yield on Pt increased with increasing current density, and the best current efficiency (CE) was obtained at 2A/2.25 cm(2). The performance in terms of Ce(IV) yield and CE of tested anodes was in order BDD >Pt >dimensional stable anode (DSA). At 2A/2.25 cm(2) on Pt and 40 °C for 90 min, the Ce(IV) yield, CE and apparent rate constant (k) for Ce(III) oxidation were 81.4%, 21.8% and 3.17 x 10(-4) s(-1), respectively. With the increase of temperature, the Ce(IV) yield, CE, and k increased (activation energy=10.7 kJ/mol), but the specific electricity consumption decreased. The Neosepta CMX membrane was more suitable than Nafion-117 and Nafion-212 to be used as the separator of the Ce(IV) regeneration process."
According to the news reporters, the research concluded: "The obtained parameters are useful to design divided batch reactors for the Ce(IV) electro-regeneration in real spent Cr-etching solutions."
For more information on this research see: Electro-regeneration of Ce(IV) in real spent Cr-etching solutions. Journal of Hazardous Materials, 2013;262():775-81. (Elsevier - www.elsevier.com; Journal of Hazardous Materials - www.elsevier.com/wps/product/cws_home/502691)
Our news correspondents report that additional information may be obtained by contacting T.S. Chen, Dept. of Environmental Engineering and Science, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan.
Keywords for this news article include: Asia, Taiwan, Pingtung, Hazardous Materials.
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