e-journal

Solubility-enhanced electrokinetic movement of hexachlorobenzene in sediments: A comparison of cosolvent and cyclodextrin

---

Abstract.
Though solubility-enhanced electrokinetics (EK) has been investigated in remediation of soils contaminated
with hydrophobic organic chemicals (HOCs), few comparative studies were performed regarding
the effect of varied solubilizing agents on both EK parameters and contaminant removal. In this study,
performances of two solubilizing agents, ethanol and methyl--cyclodextrin (MCD), were compared in
terms of either EK parameters or enhancement of hexachlorobenzene (HCB) movement in real contaminated
sediments. Six bench-scale EK tests were conducted under a voltage gradient of 2Vcm−1 for 14
or 21 d. Results reveal that ethanol had a more negative effect on cumulative electroosmotic flow (EOF)
than MCD. Furthermore, the distribution of ethanol in the sediment upon the completion of EK tests was
lower than that of MCD. The movement of HCB in sediments was observed to increase with increasing
concentrations of ethanol or MCD. Test with 50% ethanol exhibited the highest performance, followed by
test with 50 g L−1 MCD. The different performance of HCB removal for tests with varied solubilizing agents
was found to be a combined effect of the distribution of solubilizing agents in sediments, the dissolution
of HCB by pore liquid and the quantity of cumulative EOF. Finally, an integrated consideration of both EK
parameters and contaminant removal suggests that MCD can perform better than ethanol for a long-term
field application.

Keywords:
Electrokinetic
Organic cosolvent
Cyclodextrin
Sediments

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

Journal of Hazardous Materials

No. Panggil

-

Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Journal of Hazardous Materials 166 (2009) 221–226

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

KIMIA

Info Detail Spesifik

-

Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar