Zobrazeno 1 - 10
of 35
pro vyhledávání: '"E. Torracca"'
This volume presents a'photograph'of the state of the art in Science Education Research in Europe as it has emerged from the first ESERA Conference held in Rome in September 1997. The Conference saw the participation of more than 280 researchers from
Publikováno v:
Microporous and Mesoporous Materials. 20:119-127
The ion exchange behaviour of a Na-exchanged sedimentary chabazite for Pb2+, NH4+, K+, Ca2+ and Mg2+ was investigated. Equilibrium data were obtained at 25 C for Pb2+, NH4+ and K+ and interpreted in terms of two different cation sites in the zeolite
Publikováno v:
Scopus-Elsevier
Merlinoite, a rare natural zeolite, was synthesized by hydrothermal treatment of a natural glass (rhyolitic pumice) with KOH solutions at 140°C and autogenous water vapour pressure. After chemical, X-ray and thermal characterisation, the ion exchang
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43d54c0ed052010beabd805c94d7021e
https://doi.org/10.1016/s0167-2991(04)80728-6
https://doi.org/10.1016/s0167-2991(04)80728-6
Two phillipsite-like phases have been synthesized at 80°C treating a rhyolitic pumice in a mixed Na+-K+ alkaline environment, having different Na+/K+ molar ratios. The synthesized samples, displaying distinct x-ray diffraction patterns, have been ch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::97a75f144108bf3d18c93fb30a1b8067
http://hdl.handle.net/11588/138647
http://hdl.handle.net/11588/138647
Two phillipsite-like phases have been synthesized at 80°C treating a rhyolitic pumice in a mixed Na + -K + alkaline environment, having different Na + /K + molar ratios. The synthesized samples, displaying distinct X-ray diffraction patterns, have b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc1eec4158a17da6dc7e11c2f81a1ea7
http://hdl.handle.net/11588/170291
http://hdl.handle.net/11588/170291
STUDIES IN SURFACE SCIENCE AND CATALYSIS 135
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::0c610e853fd1d63f23ada148c336657d
http://hdl.handle.net/11588/170280
http://hdl.handle.net/11588/170280
Publisher Summary This chapter discusses the ion-exchange features of intermediate-silica sedimentary phillipsite. Equilibrium ion-exchange data for intermediate-silica sodium (Na)-exchanged phillipsite at 25°C, in the presence of cation pairs Na/X,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::145bc111dd6b1e37e5b30b976afcce6d
https://doi.org/10.1016/s0167-2991(01)81238-6
https://doi.org/10.1016/s0167-2991(01)81238-6
Publikováno v:
Research in Science Education in Europe
Editors' Introduction. Presidential Address. Part I: State of Art in Science Education Research. Biology. Chemistry. Physics. Earth Science. Part II: Teaching Learning Science. Part III: Science, Science Education and Society. Part IV: Teachers Educa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a412b1011d57baaae296a979ba9275e
https://doi.org/10.1007/978-94-015-9307-6
https://doi.org/10.1007/978-94-015-9307-6
Publikováno v:
Journal of Inorganic and Nuclear Chemistry. 40:91-96
Ion exchange behaviour of Zr(HPO4)(NaPO4)·5H2O towards HgCl2 solutions has been examined. Na+ and H+ ions were released by the exchanger in a ratio which depended on the pH. Uptake and rate of exchange were relatively high considering that Hg is str
Autor:
E. Torracca, S. Nunziante Cesaro
Publikováno v:
Ambix. 35:39-47