期刊
BIORESOURCE TECHNOLOGY
卷 105, 期 -, 页码 40-47出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.11.089
关键词
Decolorization; Malachite green; Ultrasonic-assisted ozone oxidation process; RSM; Operating parameters
资金
- National Nature Science Foundation of China [50821002, 51008105]
- State Key Laboratory of Urban Water Resource and Environment [2010DX11]
- China Postdoctoral Science Foundation [20100471068]
- Heilongjiang Nature Science Foundation [QC2010105]
This research set up an ultrasonic-assisted ozone oxidation process (UAOOP) to decolorize the triphenylmethane dyes wastewater. Five factors - temperature, initial pH, reaction time, ultrasonic power (low frequency 20 kHz), and ozone concentration - were investigated. Response surface methodology was used to find out the major factors influencing color removal rate and the interactions between these factors, and optimized the operating parameters as well. Under the experimental conditions: reaction temperature 39.81 degrees C, initial pH 5.29, ultrasonic power 60W and ozone concentration 0.17 g/L, the highest color removals were achieved with 10 min reaction time and the initial concentration of the MG solution was 1000 mg/L The optimal results indicated that the UAOOP was a rapid, efficient and low energy consumption technique to decolorize the high concentration MG wastewater. The predicted model was approximately in accordance with the experimental cases with correlation coefficients R-2 and R-adj(2) of 0.9103 and 0.8386. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.
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