wastewater

This study aimed to develop a mathematical model of ion transport in a system featuring a free electrolyte with membrane barriers and to investigate the interaction between diffusion and migration flows in different parts of the channel. The article presents the results of numerical modelling of the wastewater treatment process for copper ions using the electrodialysis method. Electrodialysis is a promising technology for removing dissolved ions from aqueous media due to its high efficiency, environmental safety, and the possibility of regenerating valuable components.

Pollution of the aquatic environment with heavy metals, particularly lead (Pb²⁺) and zinc (Zn²⁺) ions, is one of our most pressing environmental problems. Even insignificant concentrations of Pb²⁺ and Zn²⁺ ions in the water pose a serious threat to human health, biodiversity, and the functioning of aquatic ecosystems. The work aims to assess the effectiveness of zeolite as a low-cost natural sorbent for purifying the aquatic environment from toxic metals.

The article is dedicated to studying the effectiveness of wastewater treatment contaminated with chloramphenicol using Lemna minor with a specific biomass of 36 and 50 g/L. Purification of model solutions with an antibiotic concentration of 2-20 mg/L continued for 1-72 hours. The conducted research showed that the degree of chloramphenicol removal depends on the specific biomass of plants and the time of the process.

This article presents the results of studies of the structure of the emulsion formed in the wastewater of edible oil production. The process of refining edible oils produces stable emulsions that are released into wastewater and pose a threat to the hydrosphere.  The main pollutants in these wastewaters are organic substances, mainly of a fatty nature, which existing wastewater treatment plants are unable to treat to the level of sanitary requirements. This creates a significant environmental problem as it causes pollution of surface waters with organic substances.

This article is devoted to researching the adsorption of high-molecular compounds in a column-type apparatus, which allows for taking into account the specific properties of adsorbed substances and the design features of the equipment. The purpose of the study was to create a mathematical model that describes the process of adsorption of high-molecular compounds in a column-type apparatus, taking into account the specific properties of the adsorbed substances and the design features of the equipment.

This article is devoted to the problem of using microwave radiation as a potentially effective method of cleaning wastewater from organic compounds. The problem of cleaning wastewater from organic contaminants in the food industry requires highly effective methods since protein compounds in wastewater can cause environmental hazards and complicate the cleaning process.

In detail, this study analysed the kinetics of ammonium ion adsorption under dynamic conditions in the "clinoptilolite -ammonium ion" system. The work includes constructing a mathematical model of this process, which allows us to estimate and predict its essential characteristics. Calculations of mass transfer coefficients revealed their dependence on the intensity of medium mixing. A significant result is that ion exchange occurs in externally diffusion and intradiffusion regions.

Based on literary analysis, the effectiveness of a range of plants (aquatic: Lemna aoukikusa, Lemna minor, Spirodela polyrhiza, Lemna aequinoctialis; vetiver grass Chrysopogon zizanioides) for the purification of wastewater from antibiotics has been investigated. It has been found that the removal efficiency for various types of antibiotics and their concentrations reaches 70 percent or more. This suggests the potential application of these aquatic plants for phytoremediation of wastewater containing antibiotic contaminants.