Kinetic study and optimization of electro-Fenton process for dissolution and mineralization of ion exchange resins

Tzu Han Cheng, Chun Ping Huang, Yao-Hui Huang, Yu Jen Shih

研究成果: Article

15 引文 斯高帕斯(Scopus)

摘要

Spent ion exchange resins have become a crucial radioactive solid waste from the nuclear industry. Developing effective and safe disposal methods as alternatives to the present cementation method remains challenging. This investigation demonstrates the treatment of a mixed resin (sulfonated and quaternary ammonium polystyrene beads with a weight ratio of 40%:60%) by the electro-Fenton process. Mesh-type titanium metal that was coated with IrO2/RuO2 (Ti-DSA) was used as the anode and a stainless steel net was used as the cathode. The conversion of resins to soluble fragments and the removal of total organic carbon reached 92% and 99.4%, respectively, under conditions of solid loading = 40g L−1, pH 2, applied current = 2 A, H2O2 flow rate = 1.2 mL min−1, FeSO4 = 20 mM at 85 °C. A pseudo first-order kinetic model of consecutive reactions specified that the efficacy of the electro-Fenton depended strongly on the slowly generated styrene in the aqueous phase by H2O2 and strong acid, which was rapidly mineralized by the hydroxyl radicals. The electro-Fenton process with reused iron catalyst was effective for treating ion exchange resin for at least for three runs, greatly reducing the volume of waste resin liquid.

原文English
頁(從 - 到)954-962
頁數9
期刊Chemical Engineering Journal
308
DOIs
出版狀態Published - 2017 一月 15

    指紋

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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