文章基本信息

标题：Biosorption of Crystal Violet from Water on Leaf Biomass of Calotropis procera
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作者：Hazrat Ali ; Shah Khalid Muhammad
期刊名称：Journal of Environmental Science and Technology
印刷版ISSN：1994-7887
电子版ISSN：2077-2181
出版年度：2008
卷号：1
期号：3
页码：143-150
DOI：10.3923/jest.2008.143.150
出版社：Asian Network for Scientific Information
摘要：The biosorption of a triphenylmethane dye, crystal violet from water on leaf biomass of Calotropis procera , a member of the family Asclepiadaceae, was studied. The effect of contact time, initial dye concentration and adsorbent dose were investigated. The biomass showed good removal efficiency for crystal violet from water. The adsorbent removed 80.48 % of crystal violet from aqueous solution at a dye concentration of 20 mg L^{- 1} (about 50 ÃZÂ¼ M) in 60 min. The adsorption data fitted well into Langmuir adsorption isotherm showing monolayer coverage of the adsorbent surface. The Langmuir parameters, q_o and K_L were calculated to be 4.14 mg g^{- 1} and 0.1139 L mg^{- 1}, respectively. The kinetic data showed that the biosorption of crystal violet on the biomass obeys Lagergren first order rate expression. The rate of biosorption was rapid in the initial 5 min and then decreased gradually and attained equilibrium in 60 min. The rate constant came out to be 0.0322 min^-1.