Effect of the composition of the medium and electroflotation processing parameters on extraction efficiency of chromium(III) dispersed phase from aqueous solutions

Perfil’eva, A. V.; Brodskii, V. A.; Ильин, В.И.; Kolesnikov, V.

doi:10.1134/s1070427216030071

Cited by 8 publications

(2 citation statements)

References 3 publications

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“…This impacts positively on the removal of iron. In the same vein, increasing the TT, leads to an increase in the amount of aluminium hydroxides and H 2 bubbles, this also positively reflected in the removal of iron (Kolesnikov et al, 2017;Perfil'eva et al, 2016). Finally, an increase in iron concentration (IC) requires more aluminium hydroxides to remove it (Hashim et al, 2017b), this negatively influencing removal efficiency.…”

Section: +mentioning

confidence: 98%

Continuous-flow electrocoagulation (EC) process for iron removal from water: Experimental, statistical and economic study

Abdulhadi

Kot

Hashim

et al. 2021

Science of The Total Environment

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Section: +mentioning

confidence: 98%

Continuous-flow electrocoagulation (EC) process for iron removal from water: Experimental, statistical and economic study

Abdulhadi

Kot

Hashim

et al. 2021

Science of The Total Environment

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“…С повыше-4). С повышением мольного отношения ионов Cr 3+ по отношению к ионам Ca 2+ , Mg 2+ , NH 4 + с 1 : 1 до 1 : (1-10), степень извлечения хрома снижается с 77-79 до 8-10% [14]. Таким образом, показана целесообразность использования флокулянтов, позволяющих В таблице 3 представлены полученные ранее данные [15], обобщающие влияние флокулянтов различной природы на физикохимические характеристики (средний гидродинамический диаметр d ср , электрокинетический потенциал ζ) и показатели эффектив-…”

Section: экологизация производстваunclassified

Technological solutions and experience of industrial processing of liquid chromium-containing waste

Brodskiy,

Perfileva,

Malkova

et al. 2023

TaAE

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Analysis of the list of liquid wastes of hazard classes I and II in the Federal Classification Catalog of waste (FCCW) showed that one of the most common wastes is wastewater, waste technological solutions containing chromium ions(III, VI). This type of waste accounts for up to 15% of the total amount of liquid technogenic waste of hazard classes I and II, formed as a result of the activities of electroplating and chemical enterprises. Hexavalent chromium compounds belong to the class of toxic, extremely dangerous substances, the maximum permissible concentration (MPC) in the water of drinking water bodies for chromium (VI) is 0.05 mg/L. A feature of this type of waste is the increased salt background characteristic of electrolytes used in electroplating industries. The article presents experimental data, as well as basic technological solutions for the neutralization of chromium-containing wastewater and waste technological solutions. A technological scheme containing four main stages is proposed: reduction of hexavalent chromium, isolation of trivalent chromium from aqueous solutions, separation of accompanying compounds of heavy and non-ferrous metals, filtration post-treatment of the solution. Experimental studies have shown that, depending on the ionic composition of the medium, the efficiency of isolation of trivalent chromium compounds from aqueous solutions by electroflotation varies from 8 to 95%. The introduction of an anionic flocculant makes it possible to increase the degree of extraction to 99% or more.

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Electroflotation for Treatment of Industrial Wastewaters: A Focused Review

Mohtashami

Shang

2019

Environ. Process.

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Effect of the composition of the medium and electroflotation processing parameters on extraction efficiency of chromium(III) dispersed phase from aqueous solutions

Cited by 8 publications

References 3 publications

Continuous-flow electrocoagulation (EC) process for iron removal from water: Experimental, statistical and economic study

Continuous-flow electrocoagulation (EC) process for iron removal from water: Experimental, statistical and economic study

Technological solutions and experience of industrial processing of liquid chromium-containing waste

Electroflotation for Treatment of Industrial Wastewaters: A Focused Review

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