期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 126, 期 1-3, 页码 91-95出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2005.06.009
关键词
fly ash; basic dyes; wastewater; adsorption; ultrasonic treatment
Fly ash samples modified by NaOH solution and sonochemical treatment were tested for a basic dye (methylene blue) adsorption in aqueous solution. It is found that sonochemical treatment of fly ash can significantly increase the adsorption capacity depending on the concentration of NaOH and treatment time. The untreated FA and the sonochemically treated sample exhibits adsorption capacity at 6 x 10(-6) mol/g and C 1.2 x 10(-5) mol/g at 30 degrees C, respectively. The adsorption tests show that solution pH and adsorption temperature also influence the adsorption behaviour. The adsorption isotherms can be fitted by Langmuir and Freudlich models, while the two-site Lanamuir heterogeneous model will present the best result. (c) 2005 Elsevier B.V. All rights reserved.
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