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Persulfate regeneration of trichloroethylene spent activated carbon

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Abstract.
The objective of this studywas to demonstrate the regeneration of trichloroethylene (TCE) spent activated
carbon using persulfate oxidation and iron activated persulfate (IAP) oxidation. Both processes resulted
in decreases in the adsorbability of regenerated activated carbons. IAP was shown to rapidly degrade the
aqueous TCE and causes a significant mineralization of the TCE. The release of chloride ions provided evidence of this. Persulfate oxidation mainly resulted in desorption of TCE fromthe activated carbon and only
partial mineralization of the TCE through a carbon activated persulfate reaction mechanism. Concerning
destruction of the TCE, in the regeneration test using persulfate, 30% of the original TCE was present in
the solution and 9% remained on the activated carbon after the first regeneration cycle. In contrast, in the
test that used IAP, it was observed that no TCE was present in the solution and only approximately 5% of
the original TCE remained on the activated carbon after the first regeneration. Following the regeneration
cycles, elemental analysis was carried out on the samples. BET surface area and EDS analysis showed
some effects on the physico-chemical properties of the activated carbon such as a slight decrease in the
surface area and the presence of iron precipitates on the carbon.

Keywords:
Sodium persulfate
TCE adsorption
Regeneration
Groundwater
Permeable reactive barrier
Remediation

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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) 187–192

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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