**Chapter 7 139** Zeolites as Scaffolds for Metal Nanoclusters *by Eduard Fron* **Chapter 8 155** The Effect of HNO3 and/or NaOH Treatments on Characteristics of Mordenite

Preface

Strong technological development and increasing population over the past few decades have led not only to a dramatic increase in the demand for raw materials and energy but also to the need for recycling and process intensification. Since recycling is seen as the most promising and cost-effective option to reduce the use of fossil energy and non-regenerable raw materials, in industry and oxidic materials applications, geopolymers seem to meet all the criteria to replace conventional materials and contribute to a sustainable future. By applying innovative technologies, the coefficient of use of waste for developing new materials can be increased simultaneously along with a decrease in carbon footprint and ecological impact. Accordingly, these eco-friendly materials will participate in cutting-edge research and applications due to their tailored properties, which include superabsorbent capacity, heavy metals encapsulation, flame retardancy, mechanical performance, electrokinetic behaviour, corrosion resistance, and

Geopolymer–zeolite composites and zeolite-like geopolymers are two different categories of adsorptive materials that have recently attracted increased interest. Geopolymer–zeolite composites are hybrid materials and unite the advantages of both constituents. The geopolymer serves as durable support, while the zeolite provides a high surface area, porosity, and adsorption capacity. The report clearly shows the beneficial influence of the use of zeolitic tuff in the starting mixture on

This book joins activities and knowledge of researchers from multiple fields to present a comprehensive overview of the advances in synthesis and characterization of geopolymers, including base chemistry concepts, nanoscale characterization, and applications in top-level industry. It is organized into two sections on "Geopolymers" and "Zeolites" and includes eight chapters containing information about the theoretical approach to geopolymers and their applications in civil engineering, medicine,

Chapter 1 discusses the regeneration of exhausted materials and available resource recovery options that the regeneration approach opens. It describes new forms of geopolymer adsorbents such as foams or core-shell structures and provides a short

Nowadays, globalization generates large amounts of waste that significantly affects storage areas and the surrounding environment. At the same time, the civil engineering sector is experiencing an exponential development process, which increases the demand for building materials and usable space. Therefore, the need to obtain new materials with lower exploitation costs and natural resources consumption became primary. Chapter 2 describes one solution that has been intensively studied in the past year, especially in this sector, consisting of the development of environmentally friendly materials through a mechanism called

the microstructure and adsorption potential of geopolymers.

economic evaluation of resource recovery models.

thermal properties.

and other areas.

geopolymerisation.

*by Wega Trisunaryanti, Karna Wijaya, Desi Suryani and Uswatul Chasanah*
