Statistical analysis of optimum Fenton oxidation conditions for landfill leachate treatment

Bibliographische Detailangaben
Veröffentlicht in:	Waste management (New York, N.Y.). - 1999. - 33(2013), 1 vom: 14. Jan., Seite 81-8
1. Verfasser:	Singh, Shrawan K (VerfasserIn)
Weitere Verfasser:	Tang, Walter Z
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2013
Zugriff auf das übergeordnete Werk:	Waste management (New York, N.Y.)
Schlagworte:	Journal Article Research Support, Non-U.S. Gov't Review Fenton's reagent Organic Chemicals Water Pollutants, Chemical Hydrogen Peroxide BBX060AN9V Iron E1UOL152H7

Beschreibung
Zusammenfassung:	Copyright © 2012 Elsevier Ltd. All rights reserved. Optimal operating conditions observed by peer reviewed publications for Fenton oxidation of raw and biological and coagulation treated leachates were reviewed and statistically analyzed. For the first-stage Fenton oxidation, the optimal pH range of 2.5-4.5 was observed for raw and coagulation treated leachates with a median pH of 3.0, whereas, for biologically treated leachate the optimum pH range was 2.5-6.0 with a median pH of 4.2. Theoretically, the optimal ratio of H(2)O(2)/Fe(2+) should be the ratio of rate constants of the reactions between OH() radical with Fe(2+) and H(2)O(2), which is approximately 11; however, for leachate treatment, a median optimum relative dose of 1.8 (w/w) (3.0M/M) was observed. Biologically treated leachate showed relatively lower optimum ratio of H(2)O(2)/Fe(2+) doses (median: 0.9 w/w) as compared to raw (median: 2.4 w/w) and coagulation treated (median: 2.8 w/w) leachate. Median absolute doses of H(2)O(2) and Fe(2+) were 1.2mg H(2)O(2)/mg of initial COD (COD(0)) and 0.9 mg Fe(2+)/mg COD(0), respectively and raw leachate required higher reagent doses compared to pretreated leachates. A universal Fenton oxidation relationship between COD removal efficiency (η) and COD loading factor (L(COD)) for landfill leachate treatment was developed. As L(COD) increases from 0.03 to 72.0, η varies linearly as η=0.733 L(COD)-0.182. This robust linear relationship between L(COD) and η holds for Fenton oxidation of raw as well as biological and coagulation treated leachates. The relationship was validated using Leave-one-out cross validation technique and errors in predicting η using L(COD) were evaluated by applying Monte Carlo Simulation. As a result, the relationship can be used as a universal equation to predict Fenton treatment efficiency for a given COD(0) loading in the range of 0.03-72.0 for landfill leachate treatment
Beschreibung:	Date Completed 21.05.2013 Date Revised 21.11.2013 published: Print-Electronic Citation Status MEDLINE
ISSN:	1879-2456
DOI:	10.1016/j.wasman.2012.08.005