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Ozonation catalyzed by the raw bauxite for the degradation of 2,4,6-trichloroanisole in drinking water

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Abstract.
A kind of inexpensive and environmental friendly mineral, the raw bauxite has been used successfully
as a catalyst combined with ozonation in the degradation of 2,4,6-trichloroanisole (TCA). The catalyst
was characterized by using various analytical techniques. X-ray powder diffraction (XRD) characterization
showed that the raw bauxite containing boehmite (y-AlOOH), kaolinite (Al2Si2O5(OH)4) and quartz
(SiO2), and -AlOOH was the major composition. The catalytic ozonation removal effectiveness of TCA
was investigated under various physicochemical conditions. Both the adsorption and the single ozonation
were not effective for the degradation of TCA, and the presence of the raw bauxite in ozonation
enhanced the TCA removal effectiveness. Both the hydroxyl radicals (•OH) scavenging experiment and
Rct characterization confirmed that the generation of •OH was accounted for the enhancement of the
degradation of TCA. The generation of •OH was inhibited faintly by the presence of both natural organic
matters (NOMs) and alkalinity in the naturalwater during catalyzed ozonation with the rawbauxite. The
increasing of both the bauxite dosage and the ozone dosage enhanced the removal effectiveness of TCA.
The raw bauxite was an efficient green catalyst for TCA degradation in drinking water.

Keywords:
Bauxite
Catalyzed ozonation
2,4,6-Trichloroanisole
Hydroxyl radicals

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Informasi Detail

Judul Seri

Journal of Hazardous Materials

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Journal of Hazardous Materials 168 (2009) 246–252

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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