Simultaneous decontamination of hexavalent chromium and methyl tert-butyl ether by UV/TiO₂ process

TY - JOUR

T1 - Simultaneous decontamination of hexavalent chromium and methyl tert-butyl ether by UV/TiO2 process

AU - Xu, Xiang Rong

AU - Li, Hua Bin

AU - Gu, Ji Dong

N1 - Funding Information: The financial support from ITF grant (ITS/276/00) and industrial supports of Kou Hing Hong Scientific Supplies and Peako Engineering Co. is highly acknowledged. We would like to thank the technical support of Keith Wong and Jessie Lai.

PY - 2006/4

Y1 - 2006/4

N2 - Hexavalent chromium and methyl tert-butyl ether (MTBE) are two important environmental pollutants. Simultaneous decontamination of Cr(VI) and MTBE was studied by UV/TiO2 process. The influences of pH and the concentrations of pollutants on the kinetics of the photocatalytic reactions were evaluated. Dark adsorption tests showed that the acidic pH favored the adsorption of Cr(VI) while neutral pH favored the adsorption of MTBE. Under UV irradiation, Cr(VI) reduction was observed in Cr(VI)/TiO2 system, and MTBE oxidation was observed in MTBE/TiO2 system. The system containing Cr(VI) and MTBE by UV/TiO2 process demonstrated the synergistic effect between oxidation of MTBE and reduction of Cr(VI). The results demonstrated that two pollutants Cr(VI) and MTBE could be eliminated simultaneously by UV/TiO2 process. tert-Butyl formate, tert-butyl alcohol and acetone were identified as primary degradation products of MTBE by gas chromatography-mass spectrometry in the degradation of MTBE by UV/TiO 2 process.

AB - Hexavalent chromium and methyl tert-butyl ether (MTBE) are two important environmental pollutants. Simultaneous decontamination of Cr(VI) and MTBE was studied by UV/TiO2 process. The influences of pH and the concentrations of pollutants on the kinetics of the photocatalytic reactions were evaluated. Dark adsorption tests showed that the acidic pH favored the adsorption of Cr(VI) while neutral pH favored the adsorption of MTBE. Under UV irradiation, Cr(VI) reduction was observed in Cr(VI)/TiO2 system, and MTBE oxidation was observed in MTBE/TiO2 system. The system containing Cr(VI) and MTBE by UV/TiO2 process demonstrated the synergistic effect between oxidation of MTBE and reduction of Cr(VI). The results demonstrated that two pollutants Cr(VI) and MTBE could be eliminated simultaneously by UV/TiO2 process. tert-Butyl formate, tert-butyl alcohol and acetone were identified as primary degradation products of MTBE by gas chromatography-mass spectrometry in the degradation of MTBE by UV/TiO 2 process.

KW - Degradation

KW - Hexavalent chromium

KW - MTBE

KW - Photocatalysis

KW - Reduction

KW - TiO

UR - http://www.scopus.com/inward/record.url?scp=33645286772&partnerID=8YFLogxK

U2 - 10.1016/j.chemosphere.2005.07.062

DO - 10.1016/j.chemosphere.2005.07.062

M3 - 文章

C2 - 16169572

AN - SCOPUS:33645286772

SN - 0045-6535

VL - 63

SP - 254

EP - 260

JO - Chemosphere

JF - Chemosphere

IS - 2

ER -