Valentin Romanovski results 27
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Reagent-Free Electrolysis Purification of Aqueous Solutions from Nitrogen Compounds: Industrial AquacultureNARA Subscribed
A study of reagent-free electrolysis purification of recirculating water supply systems for industrial aquaculture (growing catfish) was conducted. The aim was to study the efficiency of nitrogen-containing compounds (NH 4 ⁺, NO 2 ⁻, NO 3 ⁻) reduction using generators with linear and pulse waveforms. The electrochemical unit operated at a current of 30 A and a voltage of 22 V, ensuring the processing of up to 20 m 3 of water p...
Wastewater purification from suspended and colloidal impurities remains a critical challenge for industrial and municipal water management. This study proposes a sustainable iron-based coagulant synthesized from foundry waste, enabling simultaneous wastewater treatment and industrial waste recycling. The magnetic fraction of foundry dust (Fe ≈ 47.7 wt%) was leached with HCl to produce an iron-containing coagulant, while the no...
The study aimed to optimize the coagulation parameters for treating oil-contaminated wastewater using aluminum coagulants, specifically aluminum sulfate and aluminum hydroxychloride. Laboratory experiments were conducted to evaluate the efficiency and behavior of these coagulants under various conditions. Results showed that the slow hydrolysis and low dissociation rate of aluminum sulfate prolonged floc formation and sediment...
Photocatalytic degradation of polycyclic aromatic hydrocarbons under visible light irradiation in water using TiO2/MgO nanocompositesNARA Subscribed
An extensive class of pollutants found in soil, water, and bottom sediments are categorized as polycyclic aromatic hydrocarbons. A possible method of breaking down polycyclic aromatic hydrocarbons is thought to be the photochemical approach. The potential application of mesoporous nanocomposites on TiO 2 /MgO as catalysts for the photooxidation of polycyclic aromatic hydrocarbons under the influence of visible light was assess...
Welders are daily exposed to various levels of welding fumes containing several metals. This exposure can lead to an increased risk for different health effects which serves as a driving force to develop new methods that generate less toxic fumes. The aim of this study was to explore the role of released metals for welding particle-induced toxicity and to test the hypothesis that a reduction of Cr(VI) in welding fumes results...