Textural, surface and chemical properties of polyvinyl chloride particles degraded in a simulated environment

MARINE POLLUTION BULLETIN

卷:133

Article

Tang, Chih-Cheng¹  Chen, Huey-Ing²  Brimblecombe, Peter³  Lee, Chon-Lin^1,4,5,6 

[1] Natl Sun Yat Sen Univ, Dept Marine Environm & Engn, Kaohsiung, Taiwan

[2] Natl Cheng Kung Univ, Dept Chem Engn, Tainan, Taiwan

[3] City Univ Hong Kong, Sch Energy & Environm, Kowloon, Hong Kong, Peoples R China

[4] Kaohsiung Med Univ, Coll Hlth Sci, Dept Publ Hlth, Kaohsiung, Taiwan

[5] Natl Sun Yat Sen Univ, Asia Pacific Ocean Res Ctr, Kaohsiung, Taiwan

[6] Kaohsiung Med Univ, Res Ctr Environm Med, Kaohsiung, Taiwan

关键词: Environmental degradation;    Marine debris;    Marine plastics;    Surface morphology;    Thermal degradation;    Ultraviolet B (UVB) radiation degradation;   

DOI  :  10.1016/j.marpolbul.2018.05.062

来源: Elsevier

【 摘 要 】

Virgin polyvinyl chloride (PVC) particles were exposed to heat, ultraviolet B (UVB) and solar radiation either in artificial seawater or in air for different periods of time. The surface and chemical properties of fresh and degraded particle surfaces were determined via image analysis using scanning electron micrographs, a Brunauer-Emmett-Teller (BET) specific surface area analyzer and infrared spectroscopy. Thermal and UVB degradation resulted in unique PVC morphologies. In addition, the increased presences of functional groups were evident as dehydrochlorination and oxidation during the degradation process, which altered the chemical properties of PVC. In contrast, under solar exposure with or without seawater, unevenness to the surface was noted that seems to originate from degradation of the PVC surface; in addition, no new functional groups were found. This suggests that the chemical properties of PVC are stable over extended periods in the marine environment.

【 授权许可】

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