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首页> 外文会议>International Conference on Bioinformatics and Biomedical Engineering >Adsorption Characteristics of Methylene Blue on Bentonite of Gansu Pingliang
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Adsorption Characteristics of Methylene Blue on Bentonite of Gansu Pingliang

机译：甘肃平凉膨润土上亚甲基蓝的吸附特征

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摘要

An anion surfactant modified bentonite (SDS-Bt) was synthesized and characterized in order to study the adsorption behavior and the removal of Methylene Blue (MB) dye from aqueous solutions. The adsorption properties, kinetics and thermodynamics mechanism of MB on Bt and SDS-Bt were discussed in combination with the results of experiments. Adsorption data were analyzed according to Freundlich, Langmuir, Tempkin and Dubinin-Radushkevich adsorption models. Tthe results indicate that adsorption behavior of MB on Bt and SDS-Bt at experimental temperature range are all fitted Langmuir isotherms. The comparison of natural Bt and SDS-Bt show that both adsorbent could be considered as a potential sorbets for dye in aqueous solutions and SDS-Bt was the superior capacity. The kinetic values and thermodynamic parameters show that the dye adsorptions on both samples are all exothermic and spontaneous process. The adsorption process followed pseudo-second-order kinetics, mainly governed by the external mass transport with the activated energy of 9.76 kJ?mol-1 and 5.77 kJ?mol-1 for Bt and SDS-Bt respectively.
机译：合成了阴离子表面活性剂改性膨润土（SDS-BT），以研究吸附行为和从水溶液中除去亚甲基蓝（MB）染料。与实验结果相结合讨论了MB对BT和SDS-BT对BT和SDS-BT的吸附性能，动力学和热力学机制。根据Freundlich，Langmuir，Tempkin和Dubinin-Radushkevich的吸附模型进行分析吸附数据。结果表明，在实验温度范围内的MB对BT和SDS-BT的吸附行为是琅勃勃等温。天然BT和SDS-BT的比较表明，两种吸附剂都可以被认为是水溶液中染料的潜在冰帽，SDS-BT是优异的容量。动力学值和热力学参数表明，两种样品上的染料吸附都是放热和自发过程。吸附过程跟踪伪二阶动力学，主要由外部质量传输管辖，具有9.76kJ的激活能量为9.76kJ？mol-1和5.77kJ？Mol-1分别用于BT和SDS-BT。

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