Degradation of sulfonated polyethylene by a bio-photo-fenton approach usingglucose oxidase immobilized on titanium dioxide

JOURNAL OF HAZARDOUS MATERIALS

卷:423

Article

Ghatge, Sunil¹  Yang, Youri¹  Ko, Yongseok¹  Yoon, Younggun²  Ahn, Jae-Hyung²  Kim, Jeong Jun²  Hur, Hor-Gil¹ 

[1] Gwangju Inst Sci & Technol GIST, Sch Earth Sci & Environm Engn, Gwangju 61005, South Korea

[2] Natl Inst Agr Sci, Bioremediat Team, 166 Nongsaengmyeong Ro, Wanju Gun 55365, Jeollabuk Do, South Korea

关键词: Biocatalysis;    Bio-Fenton;    Hydrogen peroxide;    Hydroxyl radicals;    Photo-catalysis;   

DOI  :  10.1016/j.jhazmat.2021.127067

来源: Elsevier

【 摘 要 】

Polyethylene (PE) plastics are highly recalcitrant and resistant to photo-oxidative degradation due to its chemically inert backbone structure. We applied two novel reactions such as, Bio-Fenton reaction using glucose oxidase (GOx) enzyme alone and Bio-Photo-Fenton reaction using GOx immobilized on TiO2 nanoparticles (TiO2-GOx) under UV radiation, for (bio)degradation of pre-activated PE with sulfonation (SPE). From both the reactions, GC-MS analyses identified small organic acids such as, acetic acid and butanoic acid as a major metabolites released from SPE. In the presence of UV radiation, 21 fold and 17 fold higher amounts of acetic acid (4.78 mM) and butanoic acid (0.17 mM) were released from SPE after 6 h of reaction using TiO2-GOx than free GOx, which released 0.22 mM and 0.01 mM of acetic acid and butanoic acid, respectively. Our results suggest that (bio)degradation and valorization of naturally weathered and oxidized PE using combined reactions of biochemistry, photochemistry and Fenton chemistry could be possible.

【 授权许可】

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