Natural microporous materials in environmental technology : [proceedings of the NATO advanced research workshop on the application of natural microporous materials for environmental technology, Smolenice Castle, Slovakia, 26-30 October, 1998

The material included in this volume contains both fundamental aspects as well as novel applications of natural microporous materials. It is divided into thematic units. The first section deals with novel potential applications of clays and chemically modified forms in environmental technology. The second and third sections relate the utilisation of natural zeolites and naturally occurring oxides, hydroxides and oxyhydroxides (a group of natural microporous materials with promising physicochemical properties that has not yet been completely investigated). The fourth section includes material that could not be classified in the other three. Front Matter....Pages i-x Front Matter....Pages 1-1 Structure and Chemical Characteristics of Modified Clays....Pages 3-18 Pillared Clays: Chemistry and Prospects....Pages 19-31 Hg 2+ Trapping by Thiol – Functionalised Mesoporous Silica Molecular Sieves....Pages 33-47 The Use of Clays as Sorbents and Catalysts....Pages 49-69 Contaminant Plume Management Utilising in Situ Organoclay Sorbent Zones....Pages 71-83 Atomistic Computer Modelling of Chiral Pillared Clays....Pages 85-99 Natural Microporous Materials of Central Slovakia....Pages 101-107 Sorption and Leaching Properties of the Composites and Complexes of Natural Microporous Materials....Pages 109-135 Experimental Study on the Formation of Heavy Metal Sulphides Using Layer Silicates: Environmental Aspects....Pages 137-146 Diffusion of Radionuclides in Clay-Based Ceramics....Pages 147-154 Front Matter....Pages 155-155 Zeoponic Substrates for Space Applications: Advances in the Use of Natural Zeolites for Plant Growth....Pages 157-176 Natural Zeolites and Nuclear-Waste Management: The Case of Yucca Mountain, Nevada, USA....Pages 177-191 Interaction of Actinides with Natural Microporous Materials....Pages 193-205 Environmental Applications of Natural Zeolitic Materials Based on Their Ion Exchange Properties....Pages 207-224 Zeolitised Materials of the Mediterranean Area as Adsorbents for Environmental Protection....Pages 225-236 Distribution of Industrial Minerals in Sardinia (Italy): Clinoptilolite Bearing Rocks of the Logudoro Region....Pages 237-252 Application of Microporous Materials for the Recovery of Nutrients From Wastewaters....Pages 253-270 Transition Metal Complexes Supported on Natural Zeolitic Materials: An Overview....Pages 271-281 Heterogeneous Catalysis at Supercritical Conditions Using Microporous Materials. Environmental Advantages....Pages 283-302 Properties of NaOH-Treated Slovak Zeolitic Tuff and Its Sorption Ability Towards Some Cations....Pages 303-318 Front Matter....Pages 155-155 Zeolites in Aquacultural Primary Production....Pages 319-326 Sorption of Cadmium(II) and Nickel(II) on a Natural Zeolite Rich in Clinoptilolite....Pages 327-334 Environmental Applications of Modified Natural Zeolites....Pages 335-343 Romanian Volcanic Tuffs Exploitation in Environmental Protection....Pages 345-352 Sorption of Heavy Metals and Radionuclides on Zeolites and Clays....Pages 353-363 A Preliminary Study of Mercury Uptake by a Greek Zeoliferous Rock....Pages 365-369 Natural Sorbents as Barriers Against Migration of Radionuclides from Radioactive Waste Repositories....Pages 371-379 Preparation of a Modified Adsorbent Based on Clinoptilolite and Its Application for The Removal of Iron and Manganese Ions from Artesian Water....Pages 381-386 Front Matter....Pages 387-387 Metal Detachments from (Hydr)Oxide Mineral Surfaces. A Molecular View....Pages 389-410 Using Magnetites to Remediate Heavy Metal Wastewaters from Acid-Mine Drainage....Pages 411-416 Wastewater Treatment Technology Based on Iron Oxides....Pages 417-424 Goethite Mineral as a Sorbent for Heavy Metal Ions....Pages 425-433 Reversed Phase Column Extraction Studies Using a Standardised and Silanised Anatolian Perlite....Pages 435-444 Characterisation of Natural Microporous Manganese Oxides: The Case of Todorokite....Pages 445-461 Modelling Sorption of Metals from Aqueous Solution onto Mineral Particles: The Case of Arsenic Ions and Goethite Ore....Pages 463-472 Preparation of Granular Forms of Powdered Materials for Their Application in Column Packed Beds....Pages 473-486 The Molecular Layering Method as a Basis of Chemical Nanotechnology....Pages 487-495 Front Matter....Pages 497-497 Natural Chitin Containing Materials for Colour Removal from Textile Wastewaters....Pages 499-508 Back Matter....Pages 509-516 The natural microporous materials include several types of minerals such as zeolites, clay minerals, micas, Fe-lMn- oxides/hydroxidesloxyhydroxides present in various geo­ logical environments and soil formations. Their crystal structure is characterised by the presence of intra crystal micropores (channels or interlayer void spaces) providing high microporosity/surface area and distinguished physico-chemical properties such as cata­ lytic and sorptivelion-exchange ones. This volume includes the key- lectures and participant contributions delivered at the NATO-funded Advanced Research Workshop on the Application of Natural Microporous Materials for Environmental Technology, which was held in the th Smolenice Castle, Slovakia, from the 2()1h to 30 of October 1998 and was attended by 55 participants from 17 countries. The purpose of the workshop was the critical assessment of the current developments and discussion of the future perspectives in the field of utilisation of natural microporous materials (zeolites, clays, oxides) for the solution of problems related to the toxic and nuclear waste management, water pollution control and decontamination, the environmental catalysis associated with atmospheric pollution, the creation of new materials for energy storage and agricultural management including the development of artificial soils for plant growth in the space. Of especial importance for this meeting was the exchange of information and know-how among specialists working in institutions of NATO and Cooperation Partner countries aiming towards the development of common strategies for the solution of environmental problems and the promotion of further scientific and technological collaboration in the field Proceedings of the NATO Advanced Research Workshop on the Application of Natural Microporous Materials for Environmental Technology, Smolenice Castle, Slovakia, 26-30 October 1998