THE EFFECT OF SALINITY ON THE EFFICIENCY OF WASTEWATER TREATMENT FROM IRON (III) IONS BY ELECTROFLOTOSORPTION METHOD
Abstract
Studies of the effect of sodium chloride, sulfate and nitrate salts on the sorption of iron (III) ions on an industrial powder sorbent of the brand "OU-A" in static mode have been carried out. It has been established that along with the nature of the salt, its concentration affects the sorption mechanism. The isotherm of adsorption of iron (III) ions from sodium nitrate solution can be attributed to type H according to the Gilsa classification, which implies the presence of a specific interaction with the surface of activated carbon. The sorption capacity of coal increases with an increase in the concentration of salts of chloride and sodium nitrate from 1 to 50 g/l, while the full saturation of the adsorbent Fe3+ in a solution of 50 g/l of sodium nitrate is not observed. The process of electroflotation extraction of spent sorbent from salt solutions is investigated. The effectiveness of electroflotation is affected by both the nature of the salt and its concentration in the solution. It was found that with an increase in the concentration of sodium chloride and sodium nitrate salts to 50 g/l, the degree of extraction of the spent sorbent decreases slightly by an average of 1-5%. At the same time, the efficiency of the electroflotation process drops to zero in sodium sulfate solutions with a concentration of more than 5 g/l at pH = 7. However, in acidic solutions (pH = 4) with a salt concentration of 50 g/l Na2SO4, the degree of coal extraction is 71%. Studies have shown that the use of a combined method, including sorption on coals with subsequent extraction of spent sorbent by electroflotation method, can provide high-quality pretreatment of water from iron (III) ions for reliable operation of desalination systems in industrial water purification systems.
For citation:
Gaydukova A.M., Pokhvalitova A.A., Kon’kova T.V., Stoyanova A.D. The effect of salinity on the efficiency of wastewater treatment from iron (III) ions by electroflotosorption method. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2022. V. 65. N 11. P. 119-125. DOI: 10.6060/ivkkt.20226511.6587.
References
Shestakov I.Ya., Shestakov V.I. Combined method of water purification from metal ions. Aktual. Probl. Aviatsii Kosmonavtiki. 2017. V.1. N 13. P.382-383 (in Russian).
Kyzas G.Z., Matis K.A. Electroflotation process: A review. J. Molec. Liq. 2016. V. 220. P. 657-664. DOI: 10.1016/j.molliq.2016.04.128.
Dimoglo A., Sevim-Elibol P., Dinç Ö., Gökmen K., Erdoğan H. Electrocoagulation/electroflotation as a com-bined process for the laundry wastewater purification and reuse. J. Water Process Eng. 2019. V. 31. Art. Numb. 100887. DOI: 10.1016/j.jwpe.2019.100877.
Ameri A., Tamjidi S., Dehghankhalili F., Farhadi A., Saati M. Application of algae as low cost and effective bio-adsorbent for removal of heavy metals from wastewater: a review study. Environ. Technol. Rev. 2020. V. 9. N 1. P. 85–110. DOI: 1080/21622515.2020.1831619.
Khobotova E.B., Hraivoronska I.V., Кaliuzhna I.S., Ihnatenko M.I. Sorption purification of wastewaterfrom organic dyes using granulated blastfurnace slag. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2021. V. 64. N 6. P. 89-94. DOI: 10.6060/ivkkt.20216406.6302.
Vogel A.A., Somin V.A., Komarova L.F. Study of sorption materials based on wood and mineral raw materials production waste. Khimiya Inter. Ustoich. Razvitiya. 2011. 19. N 4. P. 461-465 (in Russian).
Fazylova G.F., Valinurova E.R., Khatmullina R.M., Kudasheva F.H. Sorption parameters of phenol derivatives on various carbon materials. Sorbts. Khromatograf. Prots. 2013. V. 13. N 5. P. 728-735 (in Russian).
Thajeel A.S. Isotherm, Kinetic and Thermodynamic of Adsorption of Heavy Metal Ions onto Local Activated Carbon. Aquatic Sci. Tech. 2013. V. 1. N 2. P. 53-77. DOI: 10.5296/ast.v1i2.3763.
Amerkhanova S., Shlyapov R., Uali A. The active carbons modified by industrial wastes in process of sorption concentration of toxic organic compounds and heavy metals ions. Colloids Surf. A: Physicochem. Eng. Asp. 2017. V. 532. N 5. P. 36–40. DOI: 10.1016/j.colsurfa.2017.07.015.
Sharaf El-Deen S.E.A., Sharaf El-Deen G.E. Adsorption of Cr(VI) from Aqueous Solution by Activated Carbon Pre-pared from Agricultural Solid Waste. Separat. Sci. Technol. 2015. V. 50. N 10. P.1469–1479. DOI: 10.1080/01496395.2015.1004348.
Yu L., Ruiqi F., Zimo L., Wenzhe F., Zhuoxing W., Xinhua X. Preparation of Functional Carbon-Based Materi-als for Removal of Heavy Metals from Aqueous Solution. Progr. Chem. 2015. V. 27. N 11. P. 1665-1678. DOI: 10.7536/PC150401.
Schwentner G., Kremp W., Mauritz A., Hein A., Metzger S., Rößler A. Spurenstoffelimination in den Klärwerken Böblingen-Sindelfingen und Mannheim. Gemeindetag Baden-Württemberg. 2013. V. 5. P.193-201 (in German).
Löwenberg J., Zenker A., Krahnstöver T., Böhler M., Baggenstos M., Koch G., Wintgens T. Upgrade of deep bed filtration with activated carbon dosage for compact mi-cropollutant removal from wastewater in technical scale. Water Res. 2016. V. 94. P. 246-256. DOI: 10.1016/j.watres.2016.02.033.
Meinel F., Zietzschmann F., Ruhl A. S., Sperlich A., Jekel M. The benefits of powdered activated carbon recircu-lation for micropollutant removal in advanced wastewater treatment. Water Res. 2016. V. 91. P. 97-103. DOI: 10.1016/j.watres.2016.01.009.
Krahnstöver T., Wintgens Th. Separating powdered activated carbon (PAC) from wastewater – Technical process options and assessment of removal efficiency. J. Environ. Chem. Eng. 2018. V. 6. N 5. P. 5744-5762. DOI: 10.1016/j.jece.2018.09.001.
Gaydukova A.M., Nenasheva A.S., Kolesnikov V.A., Vetlugin N.A. The extraction of activated carbon from aqueous solution in the presence of organic and inorganic compounds by the electroflotation method. J. Water Chem. Technol. 2021. V. 43. N 2. P. 116-122. DOI 10.3103/S1063455X21020077.
Gaydukova A.M., Kolesnikov V.A., Brodskiy V.A., Kolesnikov A.V. Electroflotation extraction of carbon mate-rial powders in the presence of metal ions. CIS Iron Steel Rev. 2021. V. 22. P. 102–106. DOI: 10.17580/cisisr.2021.02.19.
Gaydukova A., Kolesnikov V., Stoyanova A., Kolesnikov A. Separation of highly dispersed carbon material of OU-B grade from aqueous solutions using electroflotation technique. Separat. Purificat. Technol. 2020. V. 245. Art. Numb. 116861. DOI: 10.1016/j.seppur.2020.116861.
MON F 14.1:2:4.50-96. Quantitative chemical analysis of waters. Method of measuring the mass concentration of total iron in drinking, surface and wastewater by photometric method with sulfosalicylic acid. (in Russian).
GOST R 57164-2016. Drinking water. Methods for deter-mining odor, taste and turbidity. (in Russian).
Gaydukova A., Kon’kova A., Kolesnikov V., Pokhvalitova A. Adsorption of Fe3+ ions onto carbon powder fol-lowed by adsorbent electroflotation. Environ. Technol. Innovat. 2021. V. 23. Art. Numb. 101722. DOI: 10.1016/j.eti.2021.101722.
Vimont A., Thibault-Starzyk F., Daturi M. Analysing and understanding the active site by IR spectroscopy. Chem. Soc. Rev. 2010. V. 39. N 12. P. 4928-4950. DOI: 10.1039/b919543m.
Lamberti C., Zecchina A., Groppo E., Bordiga S. Prob-ing the surfaces of heterogeneous catalysts by in situ IR spectroscopy. Chem. Soc. Rev. 2010. V. 39. N 12. P. 4951-5001. DOI: 10.1039/c0cs00117a.
Sokolova T.A., Alekseeva S.A. Adsorption of sulfate ions by soils (A Review). Eurasian Soil Sci. 2008. V. 41. N 2. P. 140-148. DOI: 10.1134/S106422930802004X.