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《Environmental Science and Technology》 2004-01
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An Experimental Study on Adsorption of Aqueous Dyes with Dried Activated Sludge

CHEN Chun-yun, ZHUANG Yuan-yi, LIU Fei(College of Environmental Science and Engineering,Nankai University, Tianjin 300071)  
In this study, two kinds of dyes Direct Dark Brown M and Acid Mordant Brown RH were used with dried activated sludge as the adsorbent. The experimental results indicated that the adsorption process followed the second-order kinetic model and at the same time can be described by the first-order rate expression of Lagergren. The adsorption isotherms of Acid Mordant Brown RH fit Freundlich equation and that of Acid Mordant Brown RH followed both Freundlich equation and Langmuir equation. The octanol/water partitioning coefficient log P for both dyes calculated using fragment constant method were 4.65 and 0.22 respectively, indicating the conformity with the adsorption of two kinds of dyes onto dried activated sludge.
【Fund】: 国家自然科学基金项目(29877014);; 教育部南开大学—天津大学联合研究项目(AJ0013)
【CateGory Index】: X788
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