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Adsorption behavior of ytterbium (Ⅲ) on gel-type weak acid resin

Journal of Rare Earths 2011年第5期29卷 407-412页

作者：郑展望熊春华 Department of Applied Chemistry Zhejiang Gongshang University

The adsorption and desorption behaviors of Yb（Ⅲ） on gel-type weak acid resin （110） were investigated. The influence of operational conditions such as contact time,initial concentration of Yb（Ⅲ）,initial pH of solution and temperature on the adsorption of Yb（Ⅲ） were also examined. The results showed that the optimal adsorption condition of 110 resin for Yb（Ⅲ） was achieved at pH=5.5 in HAc-NaAc medium. The maximum uptake capacity of Yb（Ⅲ） was 265.8 mg/g at 298 K. Yb（Ⅲ） could be eluted by using 3.0 mol/L HCl solution and the 110 resin could be regenerated and reused. The adsorption of Yb（Ⅲ） followed the Langmuir isotherm,and the correlation coefficients were evaluated. Various thermodynamic parameters such as standard enthalpy change （△H）,standard entropy change （△S） and standard free energy change （△G） were evaluated. The adsorption of Yb（III） on the 110 resin was found to be endothermic in nature. thomas model was successfully applied to experimental data to predict the breakthrough curves and to determine the characteristics parameters of the column useful for process design. And the resin sample both before and after adsorption was described by IR spectroscopy.

关键词： gel-type weak acid resin (110 resin) ytterbium(Ⅲ) adsorption parameter thomas model rare earths

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Column adsorption of Cu(Ⅱ) by polymer-supported nano-iron oxides in the presence of sulfate: Experimental and mathematical modeling

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Chinese Journal of Chemical Engineering 2017年第9期25卷 1163-1169页

作者： Hui Qiu Xiaolin Zhang Zhe Xu Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET) School of Environmental Science and Engineering Nanjing University of Information Science & Technology State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University

Polymer-supported hydrous iron oxides(HFOs) are promising for heavy metals removal from aqueous *** ubiquitous inorganic ligands, e.g., sulfate, are expected to exert considerable impacts on pollutants removal by these hybrid sorbents. Herein, we obtained a hybrid sorbent HFO-PS by encapsulating nanosized HFO into macroporous polystyrene(PS) resin. Both batch and column sorption experiments of Cu(Ⅱ) by HFO-PS were carried out in the presence of sulfate. Obviously, the presence of sulfate is favorable for Cu(Ⅱ) sorption onto *** performances of column Cu(Ⅱ) removal were fitted and predicted with Adams–Bohart, Clark, thomas and BDST models. thomas model is suggested best-fit to predict the breakthrough curves. Besides, a linear correlation is observed between breakthrough time and column length based on BDST model, which might be useful for predicting the breakthrough time for Cu(Ⅱ) removal by HFO-PS.

关键词： Composite Nanotechnology Waste water Hydrous iron oxide Fixed-bed adsorption thomas model

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Effect of Thermal Regeneration on the Breakthrough Performance of Ceramsite Saturated with Methylene Blue

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Journal of Harbin Institute of Technology(New Series) 2020年第5期27卷 87-96页

作者： Tianpeng Li Ting Li College of City and Architecture Engineering Zaozhuang UniversityZaozhuang 277160ShandongChina Zaozhuang Yuanheng Machinery Manufacturing Co. Ltd.Zaozhuang 277000ShandongChina

The regeneration of a spent packing is crucial with respect to the development of circular economy and abstemious ***,the effects of regeneration temperature,resistant time,heating rate,and regeneration cycle on the breakthrough performance of methylene blue(MB)dye⁃exhausted ceramsite in a two⁃stage fixed⁃bed column were studied in this *** illustrate that the ceramsite exhibited excellent potential regeneration properties under the following optimal regeneration conditions:treatment temperature was 600°C,resistant time was 15 min,heating rate was 20℃/min,regeneration cycle was over 9 cycles,and the breakthrough time,saturation time,regeneration efficiency(RE),and regeneration loss rate(RLR)were 540 min,1020 min,64.61%,and 17.73%,*** RE declined by 35.14%in over 1 cycle,while the RLR increased by 3.15 times in over 9 ***,thomas model was suitable to describe the two⁃stage fixed⁃bed column adsorption and thermal regeneration process with R2=*** conclusion,a thorough understanding of the regeneration behavior of the two⁃stage fixed⁃bed column packed with ceramsite provides reference to obtain an effective and feasible regeneration approach,and it is beneficial for further application in water treatment.

关键词： ceramsite thermal regeneration two⁃stage fixed⁃bed column breakthrough performance thomas model

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