Biosorption mechanism of Methylene Blue from aqueous solution onto White Pine (Pinus durangensis) sawdust: Effect of operating conditions

被引：198

作者：

Salazar-Rabago J.J. ^{[1
]}

Leyva-Ramos R. ^{[1
]}

Rivera-Utrilla J. ^{[2
]}

Ocampo-Perez R. ^{[1
]}

Cerino-Cordova F.J. ^{[3
]}

机构：

[1] Center for Research and Graduate Studies, Universidad Autónoma de San Luis Potosi, San Luis Potosí

[2] Department of Inorganic Chemistry, Universidad de Granada, Granada

[3] Department of Chemical Engineering, Universidad Autónoma de Nuevo León, San Nicolás de los Garza

来源：

Sustainable Environment Research | 2017年 / 27卷 / 01期

关键词：

Biosorption; Chemisorption; Electrostatic attraction; Mechanism; Methylene Blue; White Pine; Wood sawdust;

D O I：

10.1016/j.serj.2016.11.009

中图分类号：

学科分类号：

摘要：

In this work, the biosorption mechanism of the cationic dye Methylene Blue (MB) on natural White Pine sawdust (NS) (Pinus durangensis) was investigated. Likewise, the surface charge distribution of NS was determined, and its point of zero charge was found to be 4.3. Besides, the capacity of the NS for adsorbing MB was increased 1.7, 2.0 and 4.6 times when the pH was raised from 3 to 4.25, 3 to 7 and 3 to 10, respectively. This behavior was attributed to the electrostatic attraction between the negatively charged surface of NS and the cationic species MB+. The adsorption capacity increased with increased temperature because the adsorption was an endothermic process. The adsorption capacity was drastically reduced by increasing the ionic strength of the solution corroborating with the fact that the electrostatic attractions played a crucial role in the adsorption of MB on NS. It was also shown that the MB was chemisorbed because the adsorption was not reversible. The predominant adsorption mechanisms were the electrostatic attraction and chemisorption and not ion exchange. © 2016 Chinese Institute of Environmental Engineering, Taiwan

引用

页码：32 / 40

页数：8

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