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Mathematical Prediction of Sorption Processes of Heavy Metals on Cation Exchangers Using the Thomas Model

Koliehova Anastasiia, Trokhymenko Hanna, Gomelya Mykola

Journal of Ecological Engineering

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2021

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Vol. 22, nr 9

232--236

EN

On a production scale, it is advisable to use mathematical models for predicting the treatment of effluents from heavy metal ions, which will increase the efficiency of enterprises. The sorption processes of copper, zinc, nickel and cadmium ions on the KU-2-8 cation exchange resin in the acid form at different concentrations were studied in this scientific work. At the same time, the sorption curves calculated were constructed using the Thomas model. The study results showed that this model very clearly describes the sorption processes of metals on the resin. Thus, it can be used to predict the processes of wastewater treatment in production.

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Analysis of Petroleum Biodegradation by a Bacterial Consortium of Bacillus amyloliquefaciens ssp. Plantarum and Bacillus subtilis

Nedoroda Vladyslav, Trokhymenko Ganna, Khrapko Taras, Koliehova Anastasiia

Journal of Ecological Engineering

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2021

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Vol. 22, nr 11

36--42

EN

Features of change of phytotoxic influence of the soil polluted with oil at the use of a complex biological product based on strains of microorganisms Bacillus amyloliquefaciens subsp. plantarum NSh-2 and Bacillus subtilis NSh-4 in the laboratory were investigated. The level of destruction of petroleum hydrocarbons at different combinations of pollutant and biological product concentrations was determined, as well as in the absence of oil pollution to ensure the assessment of the biological product’s impact on the environment. Soil phytotoxicity was assessed by the method of biotesting using radish seeds of the Sora variety by the ratio of seedling height and the obtained mass of organic matter.

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Study of the Process of Electro Evolution of Copper Ions from Waste Regeneration Solutions

Trokhymenko Ganna, Magas Nataliya, Gomelya Nikolai, Trus Inna, Koliehova Anastasiia

Journal of Ecological Engineering

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2020

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Vol. 21, nr 2

29--38

EN

The article presents the results of the study on the process of copper electroevolution from the regeneration solutions in one- and two-chamber electrolyzers at different concentrations of sulfuric acid and the solutions of copper chlorides at different concentrations of hydrochloric acid – in a three-chamber electrolyzer. The conditions of electrochemical recovery of heavy metals from acidic and saline solutions were determined. It was shown that the most effective recovery of heavy metal cations from hydrochloric acid solutions occurs in three-chamber electrolyzers. On the basis of the results obtained, a technological scheme of a local plant for treatment of washing water of galvanic industries was proposed.

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Treatment of Wastewater Containing a Mixture of Heavy Metal Ions (Copper-Zinc, Copper-Nickel) using Ion-Exchange Methods

Koliehova Anastasiia, Trokhymenko Hanna, Melnychuk Svitlana, Gomelya Mykola

Journal of Ecological Engineering

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2019

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Vol. 20, nr 11

146--151

EN

The main aim of the scientific research was to study the ion-exchange processes in the treatment of industrial wastewaters containing a high concentration of heavy metal ions (Cu2+, Zn2+, Ni2+). The sorption results of heavy metal mixtures (Cu-Zn, Cu-Ni) from model solutions of sulfate salts on a strong-acid KU-2–8 cation exchanger in the H+-form were presented. The metals concentration was 10–50 meq/dm3. The efficiency conditions of cation regeneration in Cu2+-Zn2+, Cu2+-Ni2+-forms by 5, 8 and 10 % sulfuric acid solutions were studied. It was shown that the heavy metals from aqueous media can be removed not only from ion exchangers, but can also be restored from regenerative solutions by electrolysis to obtain metals in pure form. In general, the research results showed that the use of ion exchange is very effective in removing the heavy metal ions. The sorption efficiency and regeneration efficiency was about 100%.