Safe trapping of Cs in heat-treated zeolite matrices

Bosch, P.; Caputo, Domenico; Liguori, Barbara; Colella, C.

doi:10.1016/j.jnucmat.2003.10.001

Cited by 59 publications

(27 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Our field experiment also revealed a limited effect of zeolite application for decreasing radioactive Cs concentration in buckwheat, despite findings of earlier studies indicating that zeolite possesses radioactive Cs retention ability (Atun and Bodur, 2002;Boettinger and Ming, 2002;Bosch et al, 2004;Fujimura et al, 2013;Valke et al, 1997). The minimal zeolite effect observed in this experiment was probably caused by the comparatively lower levels of application: Fujimura et al (2013) applied 5-50 t ha −1 of zeolite in a pot experiment, whereas we applied only 1 t ha −1 .…”

Section: Discussioncontrasting

confidence: 93%

Analyses and countermeasures for decreasing radioactive cesium in buckwheat in areas affected by the nuclear accident in 2011

Kubo

Nemoto

Kobayashi

et al. 2015

Field Crops Research

View full text Add to dashboard Cite

Section: Discussioncontrasting

confidence: 93%

Analyses and countermeasures for decreasing radioactive cesium in buckwheat in areas affected by the nuclear accident in 2011

Kubo

Nemoto

Kobayashi

et al. 2015

Field Crops Research

View full text Add to dashboard Cite

“…Cabe ressaltar também a importância do uso de zeólitas na recuperação de calor e energia solar (TCHERNEV 2001), na indústria de construção civil (COLELLA et al 2001), como fertilizante na agricultura (MING & ALLEN 2001), na remoção de radionuclídeos liberados acidentalmente no meio ambiente como césio (ZAMZOW et al 1990, FAGHIHIAN et al 1999, DYER et al 2000, ABUSAFA & YÜCEL 2002, BOSCH et al 2004) e radio (ELEJALDE et al 2007), na recuperação de metais como prata (BARRER et al 1969;AKGÜL et al 2006) A elevada superfície interna em relação à externa, dada pela estrutura microporosa das zeólitas, permite a transferência de massa entre o espaço cristalino e o meio externo. Essa transferência, por sua vez, é limitada pelo diâmetro dos poros da estrutura zeolítica (AGUIAR et al 2002).…”

Section: Principais Aplicações Das Zeólitasunclassified

Remoção de metais pesados em solução por zeólitas naturais: revisão crítica

Shinzato

2007

Rev. Inst. Geol.

View full text Add to dashboard Cite

RESUMONesta síntese são discutidos os resultados de trabalhos publicados nos últimos anos referentes à aplicação das zeólitas naturais na remoção de metais pesados em solução. A seqüência de seletividade iônica, bem como os parâmetros associados à eficiên-cia de adsorção e capacidade de troca catiônica (CTC), estão inteiramente relacionados à estrutura cristalina das zeólitas e às características químicas dos íons encontrados em solução. Cabe ressaltar que, algumas variáveis externas como temperatura, pH e concentração iônica inicial podem interferir no processo de remoção de metais, assim como na seqüência de seletividade iônica. De forma geral, íons com menor energia de hidratação possuem maior preferência pelos sítios de troca disponíveis nas estruturas das zeólitas. A eficiência de remoção de íons de maior energia de hidratação, por sua vez, pode ser controlada pela sua concentração na solução: quanto menor, melhor. Verifica-se, portanto, que as zeólitas naturais possuem grande potencial de aplicação em tratamentos de efluentes contaminados com metais pesados.Palavras-chave: zeólitas naturais, adsorção, troca iônica, metais pesados. ABSTRACTRecent work on the application of natural zeolites to the removal of heavy metals in solution is discussed. Ionic selectivity sequences of natural zeolites, as well as parameters associated with their efficiency of adsorption and ionic exchange, are closely related to their crystal structure and the chemical characteristics of the ions in solution. It is noteworthy that some external variables such as temperature, pH and initial ion concentration can interfere in the process of removal of heavy metals in solution, as well as in the sequence of ionic selectivity. In general, ions with low energy of hydration have greater preference for available charged exchange sites within the zeolite framework. The efficiency of removal of ions with higher energy of hydration, in turn, can be controlled by its solution concentration: the less concentrated the better. It is evident, therefore, that natural zeolites have a great potential in the treatment of effluents contaminated by heavy metals.

show abstract

“…The zeolites used for this application, as zeolite A, zeolite X or natural chabasite, erionite, phillipsite and clinoptilolite, present a highly accessible micropore system and a correspondingly fast cation exchange, an asset for cation removal from waste solutions but a drawback for long-term stockage. As a consequence, radionuclideloaded zeolites are usually vitrified at high temperature to form lowsurface area ceramics [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Borosilicate and aluminosilicate pollucite nanocrystals for the storage of radionuclides

et al. 2011

View full text Add to dashboard Cite

Cesium can be encapsulated in crystalline aluminosilicates or borosilicates of ANA framework type by hydrothermal synthesis from alkaline solutions at a temperature as low as 115°C. No miscibility gap is observed in the borosilicate-aluminosilicate solid solution. The presence of cesium in the synthesis batch slightly decreases the yield of incorporation of boron in the silicate framework. Nanocrystals from 25 to 50 nm are formed in most of the synthesis conditions.

show abstract

Safe trapping of Cs in heat-treated zeolite matrices

Cited by 59 publications

References 13 publications

Analyses and countermeasures for decreasing radioactive cesium in buckwheat in areas affected by the nuclear accident in 2011

Analyses and countermeasures for decreasing radioactive cesium in buckwheat in areas affected by the nuclear accident in 2011

Remoção de metais pesados em solução por zeólitas naturais: revisão crítica

Borosilicate and aluminosilicate pollucite nanocrystals for the storage of radionuclides

Contact Info

Product

Resources

About