FENTON-LIKE OXIDATION OF TRICHLOROETHYLENE IN THE PRESENCE OF NATURAL PYRITE
Degradation of trichloroethylene (TCE) by Fenton-like system in the presence of naturally occurring pyrite was investigated in a batch suspension system. Pyrite was selected by evaluating the effect of different iron sources (nZVI, Iron(II, III) oxide, ferrous sulfate, and pyrite). The evaluation experiments were conducted at pH 3 with 2.14-12.8 g/L iron sources and 54-163 mM hydrogen peroxide in a dark room. TCE removal efficiency was affected by Fe(II) content of the iron sources. Oxidation reaction occurred on the surface of pyrite and its reaction rate constants were estimated to be 0.2336, 0.0737, and 0.0253 min-1 for 12.82, 4.27, and 2.14 g/L pyrite, respectively. Pyrite showed higher reactivity than any other iron sources even in the low concentration (2.14 g/L). Fenton-like oxidation using pyrite could be applied to the soil and groundwater contaminated with chlorinated organics as a potential remedial alternative for in-situ and ex-situ chemical oxidation process.
Che H Lee W
Department of Civil and Environmental Engineering,Korea Advanced Institute of Science and Technology,373-1 Guseong-Dong,Yuseong-Gu,Daejeon 305-701,Korea
国际会议
北京
英文
1-4
2009-08-24（万方平台首次上网日期，不代表论文的发表时间）