Degradation of methylene blue utilizing cobalt-impregnated zeolite beta via sulfate radical-based advanced oxidation process

J. M.L. Osias, Y. C. Chen, D. Y. Lin, Y. C. Shih, A. R. Caparanga, B. H. Chen

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

Sulfate radical-based oxidation process (SRAOP) is an efficient way to completely degrade toxic dyes from wastewater. The purpose of this study is to utilize zeolite beta to support cobalt ions as a catalyst for such application. Zeolite beta was synthesized hydrothermally with SiO2/Al2O3 ratio of 30. Cobalt was impregnated into zeolite beta via wet impregnation method, with cobalt loading of 2wt% and 5wt% Co2+/zeolite beta. Catalyst characterization was done by XRD, ICP, SEM-EDS, FT-IR, BET, and TPD. Methylene blue was used as model dye to investigate the catalytic capability of the catalyst. The set up for the batch reaction was a 500 mL beaker containing 200 mL of 100 ppm dye mechanically stirred at 300 rpm. Oxone concentration was 2mM and the catalyst loading was varied with concentrations of 0.1, 0.5 and 1 g/L. UV-vis was employed to determine the concentration of dye remaining in the solution. Catalyst particle size ranged from 150 to 300 nm with BET surface area of 576.2 m2/g. The dye exhibited adsorption activity to the zeolite, where 92.4% of the dye were adsorbed after 2 hours. Degradation capability of the catalyst was satisfactory, reaching 100% removal after 45 minutes. The study showed that utilization of zeolite beta as a support for cobalt shows promising results for SRAOP application.

Original languageEnglish
Article number012041
JournalIOP Conference Series: Earth and Environmental Science
Volume344
Issue number1
DOIs
Publication statusPublished - 2019 Nov 1
Event5th International Conference on Water Resource and Environment, WRE 2019 - Macao, China
Duration: 2019 Jul 162019 Jul 19

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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