Title: | Photo-Fenton pretreatment of carbofuran - Analyses via experimental design, detoxification and biodegradability enhancement |
Authors: | Lu, Li-An Ma, Ying-Shih Kumar, Mathava Lin, Jih-Gaw 環境工程研究所 Institute of Environmental Engineering |
Keywords: | Biodegradability;Carbofuran;Central composite design;Microtox (R) test;Response surface methodology |
Issue Date: | 10-Oct-2011 |
Abstract: | The central composite design (CCD) and response surface methodology (RSM) were employed to evaluate the effect of H(2)O(2) dosage rate (1-10 mg L(-1) min(-1)) and Fe(3+) dosage (1-100 mg L(-1)) in the photo-Fenton treatment of carbofuran and to develop the second-order polynomial equations in terms of carbofuran and dissolved organic carbon (DOC) removals and BOD(5)/DOC ratio with different reaction times. Both H(2)O(2) dosage rate and Fe(3+) dosage have significant effects on the dependable variables. Based on the results of carbofuran removal and BOD(5)/DOC ratio, H(2)O(2) dosage rate of 5.4 mg L(-1) min(-1) and Fe(3+) dosage of 59 mg L(-1) were found to be the favorable reagent dosages for carbofuran degradation. Under these conditions, the toxicity unit measured by Microtox(R) test with 5 min exposure was decreased from 47 to 6 and the biodegradability evaluated by BOD(5)/COD ratio was increased from 0 to 0.76 after 60 min reaction. The results obtained in this study demonstrate that the photo-Fenton process is a promising pretreatment before the application of biological treatment for carbofuran removal from contaminated water/wastewater. (C) 2011 Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.seppur.2011.07.040 http://hdl.handle.net/11536/14740 |
ISSN: | 1383-5866 |
DOI: | 10.1016/j.seppur.2011.07.040 |
Journal: | SEPARATION AND PURIFICATION TECHNOLOGY |
Volume: | 81 |
Issue: | 3 |
Begin Page: | 325 |
End Page: | 331 |
Appears in Collections: | Articles |
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