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首页> 外文期刊>International Journal of Scientific & Technology Research >Sorption And Kinetics Study Of Potassium Chloride In Polyvinyl Alcohol-Borate Hydrogel
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Sorption And Kinetics Study Of Potassium Chloride In Polyvinyl Alcohol-Borate Hydrogel

机译：聚乙烯醇硼酸酯水凝胶中氯化钾的吸附及动力学研究

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Abstract: Isotherms for the adsorption of KCl in PVOH-borate hydrogel was studied at 303 K by determining the amount of potassium and chloride ions adsorbed in PVOH-borate hydrogel using ion exchange chromatography and potentiometric titrations respectively. Experimental data was tested for Frendulich's, Langmuir's, Temkin's and Dubinin'Radushkevich isotherms equations. The adsorption data follows isotherms in order Frendulich's > Dubinin'Radushkevich > Temkin's. Kinetics of adsorption and desorption processes were studied using conductivity method. The applicability of pseudo first order, second order kinetics and intra particle diffusion kinetics were tested. From standard deviation, R2 and ?2 values it can be concluded that sorption of KCl using PVOH-borate hydrogel as an adsorbent obey pseudo first order kinetics. Intra particle diffusion rate constant increases on enhancement in the contents of KCl. Obeying Temkin's isotherm and intra particle diffusion kinetics confirmed the presence of interaction between potassium ions and PVOH-borate hydrogel during sorption phenomenon.
机译：摘要：通过离子交换色谱法和电位滴定法分别测定了303 K下吸附在PVOH-硼酸盐水凝胶中的钾离子和氯离子的量，研究了在303 K吸附KCl的等温线。测试了Frendulich，Langmuir，Temkin和Dubinin'Radushkevich等温线方程的实验数据。吸附数据遵循等温线，顺序为Frendulich氏> Dubinin'Radushkevich> Temkin氏。用电导率法研究了吸附和解吸过程的动力学。测试了伪一级，二级动力学和粒子内扩散动力学的适用性。从标准偏差，R2和λ2值可以得出结论，使用PVOH-硼酸盐水凝胶作为吸附剂对KCl的吸附遵循伪一级动力学。颗粒内扩散速率常数随着KCl含量的增加而增加。遵循Temkin的等温线和粒子内扩散动力学证实了在吸附现象期间钾离子与PVOH-硼酸盐水凝胶之间存在相互作用。

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