Electrolytic ferrate preparation in various hydroxide molten media

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Novel technologies for organic pollutants degradation have been studied to cope with extensive water pollution. In this work, the use of ultraviolet degradation and potassium ferrate as possible oxidation tools for toluene, a widely used industrial chemical, degradation is proposed. In the experiment with ultraviolet irradiation, a low-pressure mercury lamp was used to generate a single line electromagnetic radiation with the wavelength of 254 nm. Maximal degradation efficiency achieved after 55 minutes of irradiation was 67.1 %. In the experiments with potassium ferrate, the highest degradation efficiency was 71.2 % at the concentration of 10 mg/L of ferrate (VI) anion.

Section: Methodsmentioning

confidence: 99%

Toluene oxidation: UV irradiation vs. ferrates

Fašková

Pavúková

Mališová

et al. 2020

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“…), purity > 98 %, SIGMA-ALDRICH C 8 H 10 N 4 O 2 -caffeine (p.a. ), analytical standard, SIGMA-ALDRICH K 2 FeO 4 -potassium ferrate, electrochemically prepared with the final concentration of nearly 80 % (w/w) (Kubiňáková et al, 2015) Analysis of samples by HPLC The determination was carried out on a HPLC-PDA device detector (model Young Lin 9100). Mobile phase used for the analysis was methanol/water, the ratio of these two phases was gradually changed during the analysis, from the initial value (φ r = 1 : 9) to the final value (φ r = 9 : 1) 16 minutes before the end of the analysis.…”

Section: Methodsmentioning

confidence: 99%

Micropollutants in wastewater and their degradation by ferrates (VI)

Kubiňáková

Fašková

Králíková

et al. 2018

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In recent years, the occurrence of micropollutants (MPs) in sewage-, surface-, ground- and drinking water, and their removal processes are widely discussed. The content of various chemical organic/inorganic pollutants (pharmaceuticals, drugs, pesticides, hormones, heavy metals etc.) has increased over the years. Most of these compounds are not eliminated or biotransformed in traditional wastewater treatment plants. Several advanced oxidation processes (AOPs) for the removal of resistant micropollutants from water sources have been studied. Ferrate (VI) has aroused interest as an alternative oxidizing agent in drinking water preoxidation treatment. Electrochemically prepared potassium ferrate was used to remove the studied organic micropollutants. The effect of ferrate on two widely occurring organic micropollutants in water sources, carbamazepine and caffeine, was investigated. High performance liquid chromatography (HPLC) was used for sample analysis.

“…Potassium ferrate -electrochemically prepared with the final concentration of nearly 80 % (w/w) (Kubiňáková et al, 2015) C 14 H 10 Cl 2 NNaO 2 -diclofenac sodium (p.a. ), purity at least 96.5 % (w/w), SIGMA-ALDRICH…”

Section: Chemicalsmentioning

confidence: 99%

Degradation of anti-inflammatory drug diclofenac in sewage water

Gazdová

Kubiňáková

Hı́veš

et al. 2017

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In recent years, interest in the presence of chemical and biological pollutants (drugs, pesticides, heavy metals etc.) in sewage water has been permanently increasing and, at the same time, significant effort to eliminate them has been shown. The aim of this work was to investigate the influence of ferrates activity on the decomposition of the drug diclofenac (DCF), which is commonly present in sewage water. The main task is to follow the effect of potassium ferrate dosage on DCF degradation and to evaluate the most effective ferrates concentration in solution. Subsequently, real samples of waste water containing a significant amount of various micro‑pollutants were treated by the same amount of ferrates as laboratory samples. High-performance liquid chromatography (HPLC) was used for the sample analysis. Ferrates removal effectiveness was determined by comparing the chromatographic peak areas of residual DCF in the treated samples. Removal efficiency of diclofenac is proportional to the concentration of potassium ferrate in the treated solutions.