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Assuring good air quality is a challenge for every big city all over the world, since air pollution poses important health risk to humans and increases with the industrialization and urbanization degree. Cluj-Napoca is a Romanian city with high population density and intense traffic, but also with moderate to high air pollution. The air pollution with metals (Cu, Cd, Co, Cr, Ni, Pb and Zn) in Cluj-Napoca city was investigated using moss bags. Polyethylene bags of 50 cm2, containing 8 g dried moss (Sphagnum, L.) co...

Recently, zeolites have attracted a significant interest due to their potential use in a wide range of applications related to water treatment and environmental remediation. The chemical and thermal treatments are the most used approaches to improve the zeolites properties by enhancement of sorption properties, surface area and porosity. Chemical (2M NaCl), thermal (150 °C for 24 h) and thermo-chemical (2M NaCl, 150 °C for 24 h) activation methods for a natural clinoptilolite based zeolite originated from Romania ...

The natural zeolites (NZs) are low-cost natural materials, available in large quantities in different parts of the world, with good mechanical and thermal properties, ion exchange capacity, ability to adjust pH, high surface area and adsorption capacity. Despite their wide range of applications, the use of NZs is limited in industrial processes (where synthetic zeolites are preferred) due to presence of impurities in their structure and the properties which could not be optimized by nature. These limitations can b...

The use of synthetic or natural zeolites in food processing and medical (drug or drug support systems, nutritive supplements) applications also depends on their behavior under digestive conditions. This study aims to investigate the changes in the crystalline structure of natural zeolites in simulated in vitro digestion conditions and the interaction with simulated body fluid (SBF, pH=7.40) and simulated gastric fluid (SGF, pH=1.20). The different pH of used simulated biological fluids may result in interactions b...