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Designing a Small Water Power Plant in Poland in the Aspect of Minimizing the Impact on River Ecosystem

Janicka Anna, Molska Justyna, Świeściak Joanna, Włostowski Radosław, Włóka Adriana, Zawiślak Maciej

Rocznik Ochrona Środowiska

2021

Tom 23

332--345

A small hydro-power plant designing in aspect of current legislation is an interdisciplinary problem because of the fact that efficiency priority is not so important as ecological one. In this article the regulations concerning permissions for plant operation are discussed. The small hydro-power plant designing criteria are presented in the aspect of a plant impact on the river ecosystem.

The effect of titanium dioxide modification on the copper powder bactericidal properties

Rutkowska-Gorczyca Małgorzata, Molska Justyna, Grygier Dominika

Engineering of Biomaterials

2019

Vol. 22, no. 149

15--19

The bactericidal and bacteriostatic effects of cop-per have been known for a long time. However, the coatings apart from biological activity should fulfil a number of other requirements, such as tightness, scratch resistance or aesthetic appearance. Researchers have been working on creating durable coatings meeting these requirements for a long time. Scientific research indicates a high interest in active coatings. Nanoscale additives are used, with the aim to modify the material’s performance at the atomic level. Composite coatings allow us to provide the materials multifunctionality, and in addition, can enhance their mutual action. There are many methods for creating such materials. One of the techniques of applying composite coatings is the Cold Spray method, in which the coating is made of a powder. The main purpose of the modification is to obtain a bactericidal and bacteriostatic effect, but also a durable and wear--resistant coating. The paper proposes modifications of copper powder with amorphous submicron titanium dioxide in order to increase its biological activity. The modified powder can be used to create coatings by various methods including thermal methods. The work presents a material analysis of Cu and TiO2powders and results of bactericidal tests carried out on a Cu-TiO2 composite powder. The experiment in-cluded Escherichia coli and Staphylococcus aureus. The studies have shown a positive effect of the addition of TiO2 on bactericidal properties against both Staphylococcus aureus (Gram-positive bacteria) and Escherichia coli (Gram-negative bacteria) when mixed with copper at 1:9 ratio.

Researches on a photocatalytic device for toxic hydrocarbons removal from IC engine exhausts

Górniak Aleksander, Janicka Anna, Michniewicz Daniel, Molska Justyna, Skrętowicz Maria, Świeściak Joanna, Włostowski Radoslaw, Zawiślak Maciej

Combustion Engines

2019

R. 58, nr 4

151--155

Hydrocarbons, especially aromatic volatile organic compounds (AVOCs) and polyaromatic hydrocarbons (PAHs), emitted by IC engines, indisputably have a negative impact on the environment and public health. Even though current legislation strongly impacts on their low concentration in the exhausts, not quantity but the quality of those substances determines fumes toxicity. The paper presents results of the researches on a photocatalytic device dedicated to BTX (benzene-toluene-xylene) removal from IC engine exhausts, which can be applied in a vehicle cabin ventilation system. According to the results, the system is able to decrease toxic compounds concentration (caused by mobile emission sources) in inlet-air delivered to the vehicle interior. In effect, the system application reduces the users of a vehicle to exposure on contaminants.