Abstract：
:Pyrite is a common mineral at many mining sites. In this study, the mineral pyrite was studied as a Fenton-like reagent for environmental concerns. We selected lactate as a model target molecule to evaluate the Fenton-like catalytic efficiency of pyrite upon organic oxidation. A complete set of control experiments in both aerobic and anaerobic atmospheres unequivocally established that the pyrite in aqueous solution could spontaneously in situ generate (·)OH and H(2)O(2), serving as a Fenton-like reagent to catalyze the oxidation of lactate to pyruvate with no need for additional H(2)O(2). We called it the pyrite-only Fenton-like (PF) reagent. Monitoring concentration changes of lactate and pyruvate with the time indicated that the pyrite mediated the favorable pyruvate formation at pH 4.5, 60 °C, under air atmosphere. The PF reaction could be stimulated by visible light illumination. Under the optimum conditions, up to 50% of lactate was degraded within 10d. The results suggest that pyrite and its Fenton-like processes may be potentially practical in wastewater treatment.
journal_name
Chemospherejournal_title
Chemosphereauthors
Wang W,Qu Y,Yang B,Liu X,Su Wdoi
10.1016/j.chemosphere.2011.10.026subject
Has Abstractpub_date
2012-01-01 00:00:00pages
376-82issue
4eissn
0045-6535issn
1879-1298pii
S0045-6535(11)01179-9journal_volume
86pub_type
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