Effect of temperatures and pH on methyl violet biosorption by Mansonia wood sawdust
Effect of temperatures and pH on methyl violet biosorption by Mansonia wood sawdust
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DOI：
10.1016/j.biortech.2007.11.018
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发表时间：
2008-09-01
影响因子：
11.4
通讯作者：
Ho, Yuh-Shan
中科院分区：
文献类型：
--
作者：
Ofomaja, Augustine E.;Ho, Yuh-Shan
研究了温度对曼氏木锯屑吸附水中甲基紫染料平衡吸附的影响。平衡的生物吸附数据进行了分析，使用三个广泛应用的等温线模型; Langmuir，Freundlich和Redlich-Peterson等温线。采用线性和非线性方法确定了三种线性Langmuir等温式、Freundlich等温式和Redlich-Peterson等温式的拟合。除非线性方法外，用线性方法得到的3个Langmuir方程的Langmuir等温线参数不同。最好的拟合与朗缪尔和Redlich-Peterson等温线。甲基紫的生物吸附是强烈依赖于溶液的pH值和百分比染料去除变得显着以上的pH值7，这是略高于pH值（PZC）的木屑材料。此外，还计算了各种热力学参数，如Δ G度、Δ H度和Δ S度。结果表明，生物吸附是一个自发的吸热过程。(C)2007爱思唯尔有限公司保留所有权利。
In this study, the effect of temperature on the equilibrium biosorption of methyl violet dye from aqueous solution using Mansonia wood sawdust was studied. The equilibrium biosorption data were analyzed using three widely applied isotherm models; Langmuir, Freundlich and Redlich-Peterson isotherm. The fit of three linear Langmuir isotherm forms, the Freundlich isotherm, and the Redlich-Peterson isotherm were determined using linear and the non-linear methods. Langmuir isotherm parameters obtained from the three Langmuir linear equations by using linear method were dissimilar, except, when the non-linear method was used. Best fits were yielded with Langmuir and Redlich-Peterson isotherms. The methyl violet biosorption was strongly dependent solution pH and percentage dye removal became significant above pH 7, which was slightly higher than the pH(PZC) of the sawdust material. In addition, various thermodynamic parameters, such as Delta G degrees, Delta H degrees, and Delta S degrees were calculated. Results suggested that the biosorption was a spontaneous and endothermic process. (C) 2007 Elsevier Ltd. All rights reserved.