Removal of iopromide from an aqueous solution using dielectric barrier discharge

BACKGROUND: Both ionic and nonionic ICM are recalcitrant to ozone and traditional waste water treatment plants. In this study, the efficiency of one kind of ICM‐iopromide (IOPr) removal from an aqueous solution using a dielectric barrier discharge (DBD) method was investigated. RESULTS: An energy de...

Full description

Saved in:
Bibliographic Details
Published in:Journal of chemical technology and biotechnology (1986) 2013-03, Vol.88 (3), p.468-473
Main Authors: Liu, Yanan, Sun, Yu, Hu, Jinlong, He, Jun, Mei, Shufang, Xue, Gang, Ognier, Stéphanie
Format: Article
Language:English
Subjects:
Applied sciences
Aqueous solutions
Biodegradability
Biological
biological treatment
Carbon
Chemical engineering
Chemical industries
Dielectric barrier discharge
Energy density
Exact sciences and technology
Freshwater
General purification processes
iopromide
Pollution
Reaction kinetics
Reactors
Sewerage works: sewers, sewage treatment plants, outfalls
Wastewaters
Water treatment and pollution
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:BACKGROUND: Both ionic and nonionic ICM are recalcitrant to ozone and traditional waste water treatment plants. In this study, the efficiency of one kind of ICM‐iopromide (IOPr) removal from an aqueous solution using a dielectric barrier discharge (DBD) method was investigated. RESULTS: An energy density of 1.5E05 J L−1 resulted in the most significant removal (98.8%) of IOPr. At this energy density, no decrease in total organic carbon (TOC) was observed. Based on the IR spectra, degradation of the IOPr molecule involved hydroxylation, carbonylation and deiodination. BOD5/COD measurements indicated that the biodegradability of IOPr increased significantly as a result of DBD treatment. The byproducts of IOPr after DBD treatment were more polar and easily adsorbed and biodegraded by the activated sludge. The removal of IOPr from the solution followed first‐order kinetics, with Ks of 0.10 min−1, 0.11 min−1, 0.44 min−1 and 0.15 min−1 corresponding to energy densities of 1E + 05 J L−1, 1.3E + 05 J L−1, 1.5E + 05 J L−1 and 1.8E + 05 J L−1, respectively. The kinetics of the deiodination reactions were more complex due to subsequent iodide oxidation. CONCLUSION: DBD is very effective as a pretreatment or advanced treatment method for increasing the recalcitrant chemical's biodegradability and making subsequent biological treatment more efficient. © 2012 Society of Chemical Industry
ISSN:0268-2575
1097-4660
DOI:10.1002/jctb.3851