Journal
DESALINATION AND WATER TREATMENT
Volume 57, Issue 9, Pages 4154-4161Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/19443994.2014.988648
Keywords
TCE; Oxidation; Red mud; H2O2; Na2S2O8
Categories
Funding
- National Natural Science Foundation of China [51372129]
- Projects of Science and Technology from Shandong Province [2013GSF11608]
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In this study, the feasibility of degrading trichloroethylene (TCE)-contaminated water (initial TCE concentration of approximately 45mg/L) was evaluated via persulfate oxidation activated by red mud. The study indicates that red mud is able to activate the persulfate oxidation mechanism producing sulfate radicals (SO4-center dot) to oxidize TCE. There is a higher TCE removal (92%) with the addition of 2g/L red mud after 5h of oxidation reaction vs. non red mud system (42% TCE removal). A maximum TCE removal efficiency is obtained at neutrality condition. The TCE degradation rate reached 95% at lower temperature with the oxidation of hydrogen peroxide and sodium persulfate, respectively. This result reveals that the ability of activated persulfate (S2O82-) to generate sulfate radicals (SO4-center dot) is limited by thermal. In addition, a favorable TCE degradation rate is acquired for Fenton-like oxidation reaction with hydrogen peroxide and sodium persulfate as oxidant.
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