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Surface ozonation of polyvinyl chloride for its separation from waste plastic mixture by froth floatation

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Abstract

Selective surface modification of polyvinyl chloride (PVC) by ozonation was evaluated to facilitate the separation of PVC from other heavy plastics with almost the same density as PVC, especially polyethylene terephthalate (PET), by the froth flotation process. The optimum froth flotation conditions were investigated, and it was found that at 40°C, 90% of PVC and PET plastics floated. The bubble size became larger and the area covered with bubbles on the plastic surface was reduced with increasing temperature. Optimum PVC separation was achieved with the flotation solution at 40°C and mixing at 180–200 rpm, even for sheet samples 10 mm in size. Combined treatment by ozonation and froth flotation is a simple, effective, and inexpensive method for PVC separation from waste plastics.

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Authors and Affiliations

  1. Environmental Research and Management Center, Hiroshima University, 1-5-3 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8513, Japan

    Mallampati Srinivasa Reddy, Tetsuji Okuda, Tsung-Yueh Tsai & Wataru Nishijima

  2. Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, Hiroshima, Japan

    Keisuke Kurose, Satoshi Nakai & Mitsumasa Okada

Authors
  1. Mallampati Srinivasa Reddy
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  2. Tetsuji Okuda
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  3. Keisuke Kurose
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  4. Tsung-Yueh Tsai
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  5. Satoshi Nakai
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  6. Wataru Nishijima
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  7. Mitsumasa Okada
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Correspondence to Mallampati Srinivasa Reddy.

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Reddy, M.S., Okuda, T., Kurose, K. et al. Surface ozonation of polyvinyl chloride for its separation from waste plastic mixture by froth floatation. J Mater Cycles Waste Manag 12, 326–331 (2010). https://doi.org/10.1007/s10163-010-0305-x

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  • DOI: https://doi.org/10.1007/s10163-010-0305-x

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