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40 years of the Department of Industrial Ecology
ArticleName Complex coagulants in processes of wastewater treatment of the metallurgical industry from oil products
DOI 10.17580/chm.2023.08.09
ArticleAuthor E. N. Kuzin, N. E. Kruchinin

Mendeleev University of Chemical Technology of Russia, Moscow, Russia:

E. N. Kuzin, Cand. Eng., Associate Prof., Dept. of Industrial Ecology, e-mail:
N. E. Kruchinina, Dr. Eng., Head of the Dept. of Industrial Ecology, Dean of the Faculty of Biotechnology and Industrial Ecology, e-mail:


Wastewater treatment of metalworking processes from oil products is a complex and urgent task. Strict requirements on the part of the water utility and organizations that control the discharge of industrial effluents into water bodies dictate the need to search for new and improve traditional methods for removing oil products from water. Physico-chemical purification and, in particular, coagulation is the fundamental process of water purification. Unfortunately, traditional reagents based on aluminum or iron salts have long been obsolete, and modern titanium-containing reagents are too expensive. Sample of a complex titanium-containing coagulant was studied in the processes of wastewater treatment of gear-cutting, hardening and rolling sections. Oil products were chosen as the key pollutant. It has been established that, in terms of their effectiveness, complex titanium-containing reagents are significantly superior to both the mixed coagulant based on aluminum and iron sulfates and the traditional and most common aluminum sulfate. Regardless of the type of waste water, the residual concentration of oil products in water when using a complex coagulant was at the solubility limit and amounted to ~1 mg/dm3. The use of complex titanium-containing reagents ensured the minimum residual content of suspended solids, and also made it possible to reduce the sedimentation time of coagulation sludge and their filtration time by 1.5–2.0 times compared with a mixture of salts and individual aluminum sulfate respectively. Based on the data obtained as a result of the experiments and a preliminary environmental and economic calculation, it was concluded that the use of complex titanium-containing coagulants in the processes of wastewater treatment of metallurgical enterprises from oil products and suspended solids was highly promising.
The researches were carried out using D. Mendeleev Center for collective use of scientific equipment, within the framework of the project No. 075-15-2021-688.

keywords Complex coagulant, waste water, oil products, coagulation sludge, pollution, purification

1. De Mello Santos V. H., Campos T. L. R., Espuny M. et al. Towards a green industry through cleaner production development. Environ. Sci. Pollut. Res. 2020. Vol. 29. pp. 349–370. DOI: 10.1007/s11356-021-16615-2
2. Kuzin E. N. Application of the method of atomic emission spectroscopy with microwave (magnetic) plasma in the processes of identifying the chemical composition of steelmaking waste. Chernye Metally. 2022. No. 10. pp. 79–82.
3. Mukhametzhanova D. T., Beisembaev M. K. Waste of metallurgical enterprises, their processing and recycling. Nauka i tekhnika Kazakhstana. 2016. Iss. 3–4. pp. 122–129.
4. Lis T., Nowacki K., Małysa T. Utilization of metallurgical waste in non-metallurgical industry. Solid State Phenomena. 2013. Vol. 212. pp. 195–200. DOI: 10.4028/
5. Kuzin E. N., Kruchinina N. E. Purification of circulating and waste water in metallurgical industry using complex coagulants. CIS Iron and Steel Review. 2019. Vol. 18. pp. 72–75.
6. Ochilov G. M., Salikhanova D. S., Gumarov R. Kh., Agzamkhodzhaev A. A., Khalmatov M. M. The use of coals and composite adsorbents for wastewater treatment at the Kauldy mine. Gornyi Zhurnal. 2009. No. S1. p. 103.
7. Ksenofontov B. S., Kozodaev A. S., Taranov R. A., Vinogradov M. S. Experimental validation of wastewater treatment processes aimed at metals removal. Tsvetnye Metally. 2019. No. 10. pp. 96–101.
8. Kolvakh K. A. Wastewater treatment of enterprises of the metallurgical complex. Collection of articles of the International scientific-practical conference Open innovation. 2017. pp. 206–209.
9. Laptev A. G., Basharov M. M., Farakhova A. I. Efficiency of turbulent separation of a finely dispersed phase in thin-layer settling tanks. Energosberezhenie i vodopodgotovka. 2011. No. 5 (65). pp. 43–46.
10. Getmantsev S. V., Nechaev I. A., Gandurina L. V. Treatment of industrial wastewater with coagulants and flocculants. Moscow: ASV, 2008. 271 p.
11. Zhao Y. X., Gao B. Y., Zhang G. Z., Qi Q. B. et al. Coagulation and sludge recovery using titanium tetrachloride as coagulant for real water treatment: A comparison against traditional aluminum and iron salts. Separation and Purification Technology. 2014. Vol. 130. pp. 19–27. DOI: 10.1016/j.seppur.2014.04.015
12. Gan Yonghai, Wu Bingdang, Li Haojie, Li Jingbiao et al. Preparation and application evaluation of a novel titanium coagulant. Inorganic Chemicals Industry. 2020. Vol. 52, Iss. 9. pp. 1–5. DOI: 10.11962/1006-4990.2020-0249
13. Shi C., Guo D., Li Y., Zhang Z., Tang L. Effect of the polymerized titanium ferric sulfate (PTFS) coagulant on sedimentation of coal slime. Water. Minerals. 2022. Vol. 12, Iss. 26. DOI: 10.3390/min12010026
14. Xu J., Zhao Y., Gao B., Zhao Q. Enhanced algae removal by Ti-based coagulant: comparison with conventional Al- and Fe-based coagulants. Environmental Science and Pollution Research. 2018. Vol. 25, Iss. 13. pp. 13147–13158. DOI: 10.1007/s11356-018-1482-8
15. Gan Y., Li J., Zhang L., Wu B. et al. Potential of titanium coagulants for water and wastewater treatment: Current status and future perspectives. Chemical Engineering Journal. 2021. Vol. 406. 126837. DOI: 10.1016/j.cej.2020.126837
16. Maciej T., Bąk J., Królikowska J. Efficiency of titanium salts as alternative coagulants in water and wastewater treatment: Short review. Desalination and Water Treatment. 2020. Vol. 208. pp. 261–272. DOI: 10.5004/dwt.2020.26689
17. Shon H., Vigneswaran S., Kandasamy J., Zareie M. et al. Preparation and characterization of titanium dioxide (TiO2) from sludge produced by TiCl4 flocculation with FeCl3, Al2(SO4)3 and Ca(OH)2 coagulant aids in wastewater. Sep. Sci. Technol. 2009. Vol. 44. pp. 1525–1543. DOI: 10.1080/01496390902775810
18. Izmailova N. L., Lorentson A. V., Chernoberezhskii Y. N. Composite coagulant based on titanyl sulfate and aluminum sulfate. Russ. J. Appl. Chem. 2015. Vol. 88. pp. 458–462. DOI: 10.1134/S1070427215030155
19. Chernoberezhskii Y. M., Mineev D. Y., Dyagileva A. B., Lorentsson A. V., Belova Y. V. Recovery of kraft lignin from aqueous solutions with oxotitanium sulfate, aluminum sulfate, and their mixture. Russ. J. Appl. Chem. 2002. Vol. 75. pp. 1096–1699. DOI: 10.1023/A:1022252423563
20. Kuzin E. N., Kruchinina N. E. Preparation of complex titanium-containing coagulants by chemical dehydration. Izvestiya vuzov. Seriya "Khimiya i khimicheskaya tekhnologiya". 2022. Vol. 65. No. 5. pp. 103–111. DOI: 10.6060/ivkkt.20226505.6578
21. Wang T.-H., Navarrete-López A. M., Li S., Dixon D. A., Gole J. L. Hydrolysis of TiCl4: Initial steps in the production of TiO2. J. Phys. Chem. A. 2010. Vol. 114, Iss. 28. pp. 7561–7570. DOI: 10.1021/jp102020h

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