Influence of the size of extraframework monovalent cations in X-type zeolite on their thermal behavior

Joshi, Upendra A.; Joshi, P.N.; Tamhankar, Shubhada; Joshi, V.P.; Idage, Bhaskar B.; Joshi, Virendra; Shiralkar, V. P.

doi:10.1016/s0040-6031(01)00840-1

Cited by 53 publications

(25 citation statements)

References 27 publications

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“…They concluded that microwave assisted treatment considerably decreased the exchange time. As described in other studies, the use of microwaves decreased the temperature required for complete desorption of water, and modifications by ion exchange showed no structural changes [11]. Energy absorption in zeolites is a complex process and it is thought to be strongly affected by the presence of metal ions.…”

Section: Introductionsupporting

confidence: 53%

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Microwave effect on ion-exchange and structure of clinoptilolite

Akdeniz

Ülkü²

2007

J Porous Mater

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The effect of microwave irradiation on the ion exchange degree and structure of clinoptilolite mineral has been examined in comparison with the conventional heat treatment in waterbath. Clinoptilolite-rich mineral from the Western Anatolia, Bigadiç region was used for the experimental study. The mineral was mainly clinoptilolite (80-85%) and additionally, quartz (5-10%), and analcime + mordenite (< 5%) were found as co-existing minerals. The mineral was stable towards dehydration and maintains its original structure up to 800°C. The BET and Langmuir surface areas of the sample were found to be 22 and 17 m 2 /g for N 2 adsorption and 28 and 22 m 2

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Section: Introductionsupporting

confidence: 53%

“…Recently, a new interdisciplinary field of microwave chemistry has emerged. It has many advantages-for instance it supplies uniform and direct heating, lower temperature for some processes, enhances the reaction speed, reduces time and cost of the processes used [2][3][4][5][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Microwave effect on ion-exchange and structure of clinoptilolite

Akdeniz

Ülkü²

2007

J Porous Mater

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“…The extraction of tetrahedral coordinated aluminum from a zeolite lattice by acids was first reported by Barrer 11 etal.framework de-alumination also proceeds upon steaming of NH 4 zeolites, as given by Kerr 12 . In 1980, a new dealumination technique based on reaction between silicon tetrachloride and tetrahedral coordinated framework aluminum was reported 13,14 .…”

Section: De-alumination Of Zeolite:-mentioning

confidence: 86%

Synthesized Zeolite ZSM-5from Coal Fly Ash Its Modification, Haracterization and Study of Its Applications.

KapureG¹,

SheteS²,

Joshi³

2017

IJAR

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“…Zeolites are a class of alkaline porous alumosilicates with a negatively charged crystal lattice, neutralized by the presence of exchanged cations in the structural cavities [8][9][10][11]. Zeolites are being developed as an improvement of soil quality -they diminish the solubility and thus the biological availability of metals: salts, complexes, as well as oxides and metal-carbonate precipitates are formed with zeolites [12,13].…”

Section: Introductionmentioning

confidence: 99%

Remediation of Soil Contamination with Heavy Metals by Using Zeolite and Humic Acid Additives

Burlakovs¹,

Kļaviņš

Karklina³

2012

Latvian Journal of Chemistry

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Soil remediation at contaminated sites very often needs customized approach, because of the different content of pollutants. Various technologies from simple soil excavation and transporting to hazardous waste landfills to different kinds of remediation by vitrification and the use of additives can be used for the treatment of soil. A series of remediation experiments using zeolites and humic acids were applied to soil contaminated with copper. Remediation can be performed with easily available additive materials of natural origin found near the place of application, in order to diminish the leaching of contaminants. Soils contaminated and spiked with copper were mixed with additives, and ion selective electrode potentiometry was used in order to establish the stability constants of humic-metal complexes. Thus the study provides an opportunity to gain information on the fate of copper variously mixed with potential remediation agents -zeolites and humic acids -as additives to contaminated soils.

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Influence of the size of extraframework monovalent cations in X-type zeolite on their thermal behavior

Cited by 53 publications

References 27 publications

Microwave effect on ion-exchange and structure of clinoptilolite

Microwave effect on ion-exchange and structure of clinoptilolite

Synthesized Zeolite ZSM-5from Coal Fly Ash Its Modification, Haracterization and Study of Its Applications.

Remediation of Soil Contamination with Heavy Metals by Using Zeolite and Humic Acid Additives

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