Investigation of a basic dye adsorption from aqueous solution onto raw and pre-treated bentonite surfaces
Investigation of a basic dye adsorption from aqueous solution onto raw and pre-treated bentonite surfaces
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DOI：
10.1016/j.dyepig.2006.08.019
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发表时间：
2008-01-01
影响因子：
4.5
通讯作者：
Afsin, B.
中科院分区：
文献类型：
--
作者：
Eren, E.;Afsin, B.
研究了温度、pH和离子强度对膨润土、镍饱和膨润土、钴饱和膨润土和锌饱和膨润土吸附结晶紫（CV+）的影响。在298.15 K时，膨润土对CV+的平衡吸附量分别为0.27、0.37、0.49和0.54 mmol g（-1），分别相当于膨润土的阳离子交换容量（CEC）的108%、148%、196%和216%。在2.5-8.5范围内，染料在这些样品上的吸附与pH无关，在0 - 0.6mol·l（-1）范围内，染料的吸附随离子强度的增加而增加。热力学参数和Langmuir参数表明，阳离子饱和膨润土样品对结晶紫（CV+）的吸附能力比原土强。(C)2006爱思唯尔有限公司版权所有。
The effects of temperature, pH and ionic strength on the adsorption of crystal violet (CV+) by raw, Ni-saturated (Ni-), Co-saturated (Co-) and Zn-saturated (Zn-) bentonite samples were investigated. The amounts of CV+ adsorbed in equilibrium at 298.15 K were 0.27, 0.37, 0.49 and 0.54 mmol g(-1) bentonite, which correspond to 108%, 148%, 196% and 216% of the cation exchange capacity (CEC) of the raw, Ni-, Zn- and Co-saturated bentonite samples, respectively. The adsorption of the dye on these samples is pH-independent within the range (2.5-8.5), and it increases with ionic strength from 0 to 0.6 mol l(-1). Thermodynamic and Langmuir parameters showed that cation -saturated bentonite samples have relatively stronger ability than the raw bentonite towards the crystal violet (CV+) cation. (C) 2006 Elsevier Ltd. All rights reserved.