Journal
JOURNAL OF CLEANER PRODUCTION
Volume 208, Issue -, Pages 1347-1356Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2018.10.211
Keywords
Fe complex; Waste PP fiber; Na2S2O8 activation; Visible LED; Dye degradation
Categories
Funding
- Innovation & Pioneering Talents Plan of Jiangsu Province [2015-340]
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To develop a low cost, environmental care and high effective activation system for persulfate used for remediation of contaminated water, Fe complex was immobilized on waste polypropylene (PP) fibers through surface graft polymerization and coordination and then characterized for enhancing the activation of Na2S2O8 in the degradation of an organic dye, Reactive Red 195 in water under LED visible irradiation. It was found that Fe complex could activate Na2S2O8 in the dark, and LED irradiation enhanced the activation effect of Fe complexes on Na2S2O8, thus leading to a fast dye degradation. High Fe content in the complex or strong irradiation highly accelerated the dye decomposition in the pH range of 2-10. Hydroxyl radical as the main free oxygen radical could more significantly resulted in the dye decomposition than sulfate radicals. Dye degradation pathway in this system was elucidated. The high toxic intermediates were detected after short irradiation, and dramatically reduced by further oxidation of Na2S2O8 activated with Fe complex after long irradiation. (C) 2018 Published by Elsevier Ltd.
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