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Arsenic (As) and antimony (Sb) are highly toxic, carcinogenic elements from the same group of periodic system. They occur naturally as oxyanions, predicting their affinity to anionactive adsorbents in aqueous environment. The differences in adsorption properties of arsenate (AsO43-) and antimonate (Sb(OH)6-) were tested on natural adsorbents (zeolite, biochar, birnessite, hydrated ferric oxides - HFO) in their original and iron (Fe) or manganese (Mn) - modified forms, using the model solutions of AsO43- and SbO43-...

The purpose of the study is the evaluation of the bioeconomic potential of Western Romania in terms of determining the main agricultural and forestry products and the amount of available organic waste and by-products that can be integrated into the circular bioeconomy. The NUTS 2 administrative region West Romania consists of four counties: Timi?, Arad, Cara?-Severin and Hunedoara, which in total have more than 1.8 million hectares (ha) of agricultural land and large forested areas- a significant but not well expl...

The circular economy represents a systemic change in the economic model towards more efficient use of resources, reduction of environmental externalities and support of innovation. This article analyses the economic impacts and opportunities associated with the implementation of the principles of the circular economy in the European and Czech contexts. Based on a systematic literature review, analysis of strategic documents and selected empirical studies, the macroeconomic benefits, impacts on the labour market, b...

The volatile fatty acids (VFAs) are a valuable source of hydrogen on fuel industry or precursors of polyhydroxyalkanoates, a highly in trend and non-toxic bioplastics. However, the VFAs generation costs are expensive. Therefore, this study proposed a recycling solution of the waste activated sludge (WAS) into VFAs by non-conventional treatment with tandem steps of energic and slow oxidation in alkaline media by hybrid treatment with ozone and sodium percarbonate (SPC), followed by semi-aerobic fermentation at 22oC...

Horizontal composite tanks represent critical components in industrial applications where achieving an optimal balance between mechanical performance, material efficiency, and environmental impact is essential. This study investigates the environmental performance of structurally optimized glass-fiber-reinforced polymer (GFRP) horizontal tanks featuring progressive rib thickness configurations. The composite laminate optimization was carried out through advanced numerical simulations in ANSYS Mechanical 2024 R1, c...

The growing amount of waste and the pressure to transition to a sustainable and circular economy create the need to modernize waste management through technological innovations. This article focuses on the analysis of selected innovative technologies and waste processing, namely plasma gasification, hydrothermal carbonization, chemical recycling of plastics, robotic sorting systems using artificial intelligence and biological processes such as enzymatic degradation of plastics. Based on a systematic literature sea...

This study evaluates the environmental performance of two CNC machining strategies-three-axis and five-axis milling-used in the production of an aluminum wheel upright for a Formula Student vehicle. A process-based gate-to-gate Life Cycle Assessment (LCA) was carried out using Sphera GaBi software and the Ecoinvent 3.9.1 database, focusing exclusively on impacts associated with the manufacturing technologies. The analysis included detailed measurements of electricity consumption, machine time, machining operation ...