Adsorption, kinetic and equilibrium studies of Cr(VI) by hazelnut shell activated carbon
Adsorption, kinetic and equilibrium studies of Cr(VI) by hazelnut shell activated carbon
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DOI：
10.1260/026361704323150999
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发表时间：
2004-01-01
影响因子：
2.9
通讯作者：
Kobya, M
中科院分区：
文献类型：
--
作者：
Kobya, M
研究了榛子壳活性炭（HSAC）对水中铬（VI）的吸附性能。通过改变参数如搅拌时间、初始溶液pH、初始Cr（VI）浓度和温度来进行吸附。实验数据拟合良好的准一级动力学模型，允许的速率常数进行评估。Langmuir吸附等温线提供了最好的相关性的Cr（VI）到活性炭上的吸附。Cr（VI）的吸附具有pH依赖性。对于浓度为1000 mg/l的Cr（VI）溶液，在初始pH为1.0时，由Langmuir等温线计算的吸附容量为170 mg/g。热力学参数进行了评价，表明吸附是吸热的，涉及单层吸附的Cr（VI）。
The adsorption of chromium(VI) from aqueous solutions on to hazelnut shell activated carbon (HSAC) was investigated. The adsorption was carried out by varying parameters such as the agitation time, the initial solution pH, the initial Cr(VI) concentration and the temperature. The experimental data were well fitted by the pseudo-first-order kinetic model allowing the rate constants to be evaluated. The Langmuir isotherm provided the best correlation for the adsorption of Cr(VI) onto the activated carbon. The adsorption of Cr(VI) was pH-dependent. The adsorption capacity as calculated from the Langmuir isotherm was 170 mg/g at an initial pH of 1.0 for a Cr(VI) solution of 1000 mg/l concentration. Thermodynamic parameters were evaluated, indicating that the adsorption was endothermic and involved monolayer adsorption of Cr(VI).