Photocatalytic degradation of chlorophenols using star block copolymers: Removal efficiency, by-products and toxicity of catalyst

Seung Gun Chung, Yoon Seok Chang, Jae Woo Choi, Kyung Youl Baek, Seok Won Hong, Seong Taek Yun, Sang-Hyup Lee

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

This study investigated the photocatalytic degradation of chlorophenols using two different types of porphyrin core star block copolymers (P-PSD and P-PD) with irradiation using visible light. Both P-PSD and P-PD catalysts show similar tendencies in the degradation of chlorophenols. Pentachlorophenol degraded faster than other chlorinated phenols (pentachlorophenol. >. 2,4,6-trichlorophenol. >. 2,4-dichlorophenol). The removal rate of chlorophenols using P-PSD was higher than the removal rate using P-PD, a difference which could be attributed to the hydrophobicity of P-PSD. The degradation intermediates and by-products of the chlorophenols were also identified. The analysis results revealed that the degradation of highly-chlorinated phenols was more rapid than the degradation of the less-chlorinated phenols, as confirmed by residual chlorinated compound and chloride ions that were released. The newly synthesized P-PSD catalyst is non-toxic to bacteria. For these reasons, the process of photocatalytic degradation using porphyrin core star block copolymers has potential advantages for the degradation of dissolved chlorophenol pollutants in water.

Original languageEnglish
Pages (from-to)921-928
Number of pages8
JournalChemical Engineering Journal
Volume215-216
DOIs
Publication statusPublished - 2013 Jan 5

Keywords

  • Chlorophenols
  • Hydrophobicity
  • Photocatalytic degradation
  • Porphyrin
  • Star block copolymer
  • Toxicity

ASJC Scopus subject areas

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

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