Fast removal of the acid properties in the NaX zeolite by ion-exchange under microwave heating

2004 ◽  
Vol 5 (3) ◽  
pp. 157-160 ◽  
Author(s):  
M.D. Romero ◽  
G. Ovejero ◽  
M.A. Uguina ◽  
A. Rodrı&#x;guez ◽  
J.M. Gómez
Keyword(s):  
Ion Exchange ◽  
Microwave Heating ◽  
Acid Properties ◽  
Nax Zeolite ◽  
Fast Removal

Effective Removal of Mercury Ions in Aqueous Solutions: A Review

2020 ◽  
Vol 16 (3) ◽  
pp. 363-375
Author(s):  
Kang Hua ◽  
Xueliu Xu ◽  
Zhiping Luo ◽  
Dong Fang ◽  
Rui Bao ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Ion Exchange ◽  
Biological Treatment ◽  
Metal Removal ◽  
Removal Rate ◽  
Synergistic Effects ◽  
Heavy Metal Removal ◽  
Future Research ◽  
Human Beings ◽  
Fast Removal

Background: Due to its high toxicity and bioaccumulation, the existence of mercury in the environment is always a big threat to human beings. In order to control mercury pollution, scientists have put great efforts in the past decades. Methods: Precipitation, adsorption, membrane separation, biological treatment and ion exchange are reviewed as a remover for mercury removal. For each material type, we not only reported on the removal mechanism, but also discussed the best areas for it. The correlation method and step-to-step focusing method have been used for references. Conclusion: With the exploration and application of research, people have mastered a variety of mature technologies for the treatment of mercury-containing wastewater. Using inexpensive adsorbents is a cost-effective method for treating low concentrations of heavy metal wastewater. Ion exchange with a fast removal rate has been widely used in the field of heavy metal removal from wastewater. The biological treatment method can effectively treat low-concentration mercurycontaining wastewater. However, there is still a need to develop novel mercury removers with high capacity, fast removal rate, and low removal limit. Nanomaterials with a high specific surface area on substrate with synergistic effects, such as high adsorption and ion exchange, are the future research points.

Fast tailoring of the acid–base properties in the NaX zeolite by cesium-exchange under microwave heating

2007 ◽  
Vol 98 (1-3) ◽  
pp. 317-322 ◽  
Author(s):  
M.D. Romero ◽  
G. Ovejero ◽  
M.A. Uguina ◽  
A. Rodrı´guez ◽  
J.M. Gómez
Keyword(s):  
Microwave Heating ◽  
Acid Base ◽  
Nax Zeolite ◽  
Base Properties

Screening of ion exchange resin catalysts for epoxidation of oleic acid under the influence of conventional and microwave heating

2019 ◽  
Vol 94 (9) ◽  
pp. 3020-3031 ◽  
Author(s):  
Adriana Freites Aguilera ◽  
Pasi Tolvanen ◽  
Adrien Oger ◽  
Kari Eränen ◽  
Sébastien Leveneur ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Ion Exchange ◽  
Microwave Heating ◽  
Exchange Resin ◽  
Ion Exchange Resin

Multicomponent ion exchange isotherms in NaX zeolite: evaluation of Cr/Ca/Mg, Cr/Ca/K and Cr/Mg/K systems

2008 ◽  
Vol 83 (7) ◽  
pp. 983-990 ◽  
Author(s):  
Maria Angélica S.D. Barros ◽  
Pedro A. Arroyo ◽  
Eduardo F. Sousa-Aguiar ◽  
Célia R.G. Tavares
Keyword(s):  
Ion Exchange ◽  
Nax Zeolite

Synthesis of Nano-NaX Zeolite by Microwave Heating Method for Removal of Lead, Copper, and Cobalt Ions from Aqueous Solution

2015 ◽  
Vol 141 (5) ◽  
pp. 04014088 ◽  
Author(s):  
Mahdi Ansari ◽  
Ahmadreza Raisi ◽  
Abdolreza Aroujalian ◽  
Bahram Dabir ◽  
Mohammad Irani
Keyword(s):  
Aqueous Solution ◽  
Microwave Heating ◽  
Heating Method ◽  
Cobalt Ions ◽  
Nax Zeolite

Equilibrium of ammonium ion exchange by NaX zeolite

1992 ◽  
Vol 88 (24) ◽  
pp. 3611-3612 ◽  
Author(s):  
Nurdan Eken Saraçoğlu ◽  
Serap Aldīkaçtī ◽  
Ayla Hasaltun ◽  
Fulya Yiğitel
Keyword(s):  
Ion Exchange ◽  
Ammonium Ion ◽  
Nax Zeolite

Catalytic dehydration of fructose into 5-hydroxymethylfurfural by ion-exchange resin in mixed-aqueous system by microwave heating

2008 ◽  
Vol 10 (7) ◽  
pp. 799 ◽  
Author(s):  
Xinhua Qi ◽  
Masaru Watanabe ◽  
Taku M. Aida ◽  
Richard Lee Smith, Jr.
Keyword(s):  
Ion Exchange ◽  
Microwave Heating ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Aqueous System

Preliminary Study of the Effect Microwave-Heating on the Morphology and Surface Area of NaX Zeolite

2017 ◽  
Vol 895 ◽  
pp. 69-72 ◽  
Author(s):  
Hilman Imadul Umam ◽  
Akfiny Hasdi Aimon ◽  
Ferry Iskandar
Keyword(s):  
Microwave Heating ◽  
Surface Area ◽  
Heating Time ◽  
Area Measurement ◽  
Bet Surface Area ◽  
Nax Zeolite ◽  
Surface Area Measurement ◽  
Long Time ◽  
Zeolite Formation ◽  
Preliminary Study

The effect of microwave-heating on the morphology and surface area of NaX zeolite was studied. The characteristics of NaX zeolite, which has a porous structure, make NaX zeolite applicable as a catalyst. Generally, the process of NaX zeolite formation with an FAU-type structure, either naturally or synthetically, requires quite a long time. Therefore, in this research the effect of microwave heating on the produced sample was investigated using XRD, SEM, and BET surface area measurement. The heating time parameter was varied to determine the optimal conditions for the synthesis of NaX zeolite. The results indicated that microwave-heating is capable of accelerating the crystallization process and reduce the agglomeration of NaX zeolite, as shown by the XRD and SEM results. Based on the SEM result, the particle size distributions of the samples microwave-heated for 1, 3, and 5 minutes, were 350.5, 262.5, and 243.9 nm respectively. In addition, prolonging the microwave-heating time made the surface area of the samples become larger. The specific surface area of the samples microwave-heated for 1, 3, and 5 minutes, 55.9, 153.5, and 204.1 m2/g respectively.

Embedding Procedure for Water Swollen Samples

1970 ◽  
Vol 28 ◽  
pp. 504-505
Author(s):  
Ann M. Thomas ◽  
Virginia Shemeley
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ion Exchange ◽  
Structural Changes ◽  
Cross Linking ◽  
Ion Exchange Resins ◽  
Transmission Electron ◽  
First Pass ◽  
Exchange Resins

Those samples which swell rapidly when exposed to water are, at best, difficult to section for transmission electron microscopy. Some materials literally burst out of the embedding block with the first pass by the knife, and even the most rapid cutting cycle produces sections of limited value. Many ion exchange resins swell in water; some undergo irreversible structural changes when dried. We developed our embedding procedure to handle this type of sample, but it should be applicable to many materials that present similar sectioning difficulties.The purpose of our embedding procedure is to build up a cross-linking network throughout the sample, while it is in a water swollen state. Our procedure was suggested to us by the work of Rosenberg, where he mentioned the formation of a tridimensional structure by the polymerization of the GMA biproduct, triglycol dimethacrylate.

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