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Kinetics of acrylonitrile adsorption from an aqueous solution using Dowex Optipore L-493

机译:使用Dowex Optipore L-493从水溶液中吸附丙烯腈的动力学

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Adsorption is widely applied in water treatment and activated carbon is the most common adsorbent. Slow intraparticle mass transfer and incomplete regeneration of the activated carbon form drawbacks in adsorption processes. Recently the use of polymeric sorbents as an alternative for activated carbon has been increasing. In this study the kinetics of the adsorption of acrylonitrile from an aqueous solution onto Dowex Optipore L-493, a polymeric sorbent, is examined using zero-length columns. The adsorption equilibrium was found by use of batch experiments and it could be described by a Langmuir isotherm. The external mass transfer was estimated by use of correlations. The intraparticle surface diffusion coefficient was found to be 2.0 x 10~(-10) m~2/s. The fast intraparticle mass transfer allows running adsorption columns with a high superficial velocity which is desirable for industrial processes.
机译:吸附被广泛应用于水处理中,活性炭是最常见的吸附剂。缓慢的颗粒内传质和活性炭的不完全再生在吸附过程中形成了缺陷。最近,越来越多地使用聚合物吸附剂作为活性炭的替代品。在这项研究中,使用零长度色谱柱检查了丙烯腈从水溶液中吸附到聚合物吸附剂Dowex Optipore L-493上的动力学。吸附平衡是通过分批实验发现的,可以用Langmuir等温线描述。通过使用相关性估算外部传质。发现颗粒内表面扩散系数为2.0×10〜(-10)m〜2 / s。快速的颗粒内质量传递使吸附柱能够以较高的表观速度运行,这对于工业过程而言是理想的。

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