Photocatalytic degradation of chlorophenols using star block copolymers: Removal efficiency, by-products and toxicity of catalyst
- Photocatalytic degradation of chlorophenols using star block copolymers: Removal efficiency, by-products and toxicity of catalyst
- 정승건; 장윤석; 최재우; 백경열; 홍석원; 윤성택; 이상협
- Chlorophenols; photocatalytic degradation; Star block copolymer; Porphyrin; Hydrophobicity; Toxicity
- Issue Date
- Chemical engineering journal
- VOL 215-216, 921-928
- 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.
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