| dc.creator |
Kitis, Mehmet |
|
| dc.creator |
ADAMS, CD |
|
| dc.creator |
DAİGGER, GT |
|
| dc.date |
1999-07-31T21:00:00Z |
|
| dc.date.accessioned |
2020-10-06T09:49:48Z |
|
| dc.date.available |
2020-10-06T09:49:48Z |
|
| dc.identifier |
4a6f146d-018f-4909-a827-56fdecb89108 |
|
| dc.identifier |
10.1016/s0043-1354(98)00476-x |
|
| dc.identifier |
https://avesis.sdu.edu.tr/publication/details/4a6f146d-018f-4909-a827-56fdecb89108/oai |
|
| dc.identifier.uri |
http://acikerisim.sdu.edu.tr/xmlui/handle/123456789/59334 |
|
| dc.description |
The effectiveness of Fenton's reagent pretreatment on the biodegradability of selected nonylphenol ethoxylates (NPEs) ethylene oxide/propylene oxide (EO/PO) block copolymers and a nonsurfactant compound polypropylene glycol (PPG) was examined. Chemical oxidation kinetic studies were conducted that showed that the Fenton reaction was rapid at the base conditions used (approx. 1000 mg/L COD 1000 mg/L H2O2, H2O2,/Fe-II molar ratio of unity) based on dissolved organic carbon, chemical oxygen demand, H2O2 and Fe-II removals. Batch aerobic bioassays were conducted to assess both the rate and the extent of biodegradability of the chemically preoxidized and unoxidized samples. A 12-L sequencing batch reactor (SBR) was operated aerobically to provide acclimated biomass for use in the bioassays. EO/PO block copolymers, PPGs and (to a lesser degree) NPEs were found to be biorecalcitrant, that is, resistant to biomineralization. Advanced oxidation pretreatment using Fenton's reagent was highly effective at enhancing the biodegradability of EO/PO block copolymers and PPG. The biodegradability of NPEs, however; decreased with low oxidant dosages and increased with higher oxidant dosages. Economic estimates showed that chemical costs would comprise more than 90% of the overall treatment costs for an integrated Fenton/activated sludge treatment system. (C) 1999 Elsevier Science Ltd. All rights reserved. |
|
| dc.language |
eng |
|
| dc.rights |
info:eu-repo/semantics/closedAccess |
|
| dc.title |
The effects of Fenton's reagent pretreatment on the biodegradability of nonionic surfactants |
|
| dc.type |
info:eu-repo/semantics/article |
|