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首页> 外文期刊>Journal of Environmental Science and Health >Sorption of Acid Black 1 dye onto bentonite - equilibrium and kinetic studies
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Sorption of Acid Black 1 dye onto bentonite - equilibrium and kinetic studies

机译：酸黑1染料对膨润土 - 平衡和动力学研究的吸附

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摘要

The present study shows sorption capacity of bentonite from the Slovak Jelsovy Potok deposit for the anionic dye (Acid Black 1) from aqueous solutions and uses it as an effective and economical adsorbent for the removal of anionic dye. The laboratory experiments were carried out in batch method at 3 different sorbent doses (20, 10 and 5 g L-1) and an initial concentration of dye ranging from 1 to 1,000 mg L-1. The adsorption equilibria data were fitted by Freundlich, Langmuir, Dubinin-Radushkevich and Temkin isotherms. The Langmuir equation provided the best description for the sorption, indicating that adsorption occurred on a mono-layered surface. The maximum sorption capacity of bentonite has been estimated as 31.29 mg g(-1). Moreover, the results showed that non-linear method could be a better way to obtain the isotherm parameters. The pseudo-first- and pseudo-second-order equations have been applied for the determination of time effect on sorption/removal of dye from solution. The highest determination coefficient values were observed for the pseudo-second-order model, suggesting chemical character of the adsorption process. Acid Black 1 was probably bound through chemisorption by forming hydrogen bonds between the Si-OH and Al-OH groups in the bentonite and the -NH, -NH2 and -OH groups in the dye.
机译：本研究显示了来自水溶液的阴离子染料（酸黑1）的斯洛伐克·莫氏Potok沉积物的吸附能力，并用它作为去除阴离子染料的有效和经济的吸附剂。实验室实验在3种不同的吸附剂剂量（20,10和5g L-1）中以分批方法进行，并且初始浓度为1-1,000mg L-1。吸附均衡数据由Freundlich，Langmuir，Dubinin-Radushkevich和Temkin等温机装配。 Langmuir方程提供了用于吸附的最佳描述，表明在单层表面上发生吸附。膨润土的最大吸附能力估计为31.29mg g（-1）。此外，结果表明，非线性方法可以是获得等温参数的更好方法。伪第一和伪二阶方程已被应用于确定从溶液中吸附/除去染料的时间效应。对于伪二阶模型，观察到最高的测定系数值，表明吸附过程的化学特性。通过在润照石中的膨润土中的Si-OH和Al-OH基团之间形成氢键和-NH，-N2和-OH基团之间的氢键，可能通过化学束而酸黑1。

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