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Treatment  of  anionic  dyes  wastewater  by  a  leaching  solution  of  white  mud

LI Xia1, LI Yu-jiang1*, WU Tao2, SUN De-jun2, WANG Biao1   

  1. 1. School of Environmental Science and Engineering, Shandong University, Jinan 250100, China;
    2. Key Laboratory of Colloid & Interface Science of Education Ministry, Shandong University, Jinan 250100, China
  • Received:2009-10-27 Online:2010-04-16 Published:2009-10-27


The alkaline white mud was dipped in dilute hydrochloric acid, and filtered to prepare the leaching solution. The removal effects of activated light yellow K-6G, acid orange Ⅱ and direct yellow R from an aqueous solution using the leaching solution of white mud were studied. The results showed that the leaching solution of white mud was particularly effective in  removing   activated light yellow K-6G,  acid orange Ⅱ and  direct yellow R. Particularly when the dosage was 2g/L, the  pH respectively was 12.5, 12.0 and 12.0, the maximum removal efficiencies  reached up to 93.5%, 97.5% and 99.8% respectively. The appropriate reaction time was 90 s. It also indicated that the adsorption behavior of the anionic dyes on the hydroxide precipitates formed in alkaline solution by leaching solution in alkaline solution  fitted well with the Freundlich isotherms. The adsorption process was exothermic in nature.

Key words: leaching solution of white mud, adsorption, anionic dyes, decolorization

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