JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE)

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WANG Jing,LI Yu-jiang,ZHANG Xiao-jin,BI Yan-jun,CHEN Wei-suo   

  1. School of Environmental Science and Engineering,Shandong University,Jinan 250100,China
  • Received:2006-02-10 Revised:1900-01-01 Online:2006-12-24 Published:2006-12-24
  • Contact: WANG Jing

Abstract: The characteristic of fly ash from coal power plant was improved by dilute hydrochloric acid. The removal of activated purple KNB from aqueous solution by using the original and activated fly ash was studied.The results show that the efficiency of dye adsorption is obviously high for the actived fly ash, and the decoloration is more effective. At the optimum pH ranging from 2 to 8 and the optimum reaction time of 15 min, the decolorization rate reaches above 99% when enough dose of activated fly ash is added. It also indicate that the adsorption behavior of fly ash to activated purple KNB fitted with the Langmuir isotherms. In practical treatment of textile effluent by activated fly ash, the decolorization and COD removal are also effective.

Key words: absorption, decolorization, wastewater treatment , fly ash

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