DOI 10.35776/VST.2022.01.06
UDC 628.16.065.2:553.635.1

Kamarou Maksim, Kamluk Tat’iana

Synthetic gypsum prepared from natural water coagulation sludge

Summary

The results of studies on the preparation of gypsum from waste sulfuric acid from the production of chemical fibers, and calcium-containing waste sludge generated in the process of natural water coagulation, are presented. During the synthesis of spent sulfuric acid and coagulation sludge, calcium sulfate dihydrate with crystals of a given size and shape is formed, as well as a by-product – a filtrate with a high concentration of Mg, Na, S and Ca. The availability of these elements opens up the potential of using the filtrate as a microfertilizer, and ferrous sulfate (about 11 wt. %) as a coagulant. The availability of iron in the filtrate also opens up the doors to using it as a precursor for the production of catalytic materials for removing dissolved organic substances from wastewater by photocatalytic treatment, or for the production of sorption materials for removing oil products from wastewater. Iron in these materials will give them additional magnetic properties to enhance their extraction from the treated aqueous media. The technical and economic analysis showed that using the filtrate significantly increases the investment efficiency of the proposed technological process.

Key words

filtrate , natural water , gypsum , coagulation sludge , fertilizer

The further text is accessible on a paid subscription.
For authorisation enter the login/password.
Or subscribe

REFERENCES

1. Romanovski V. Agricultural waste based-nanomaterials: Green technology for water purifications. Aquananotechnology. Applications of nanomaterials for water purification, 2021, pp. 577–595. DOI: 10.1016/B978-0-12-821141-0.00013-6.
2. Romanovskaia E., et al. Selective recovery of vanadium pentoxide from spent catalysts of sulfuric acid production: Sustainable approach. Hydrometallurgy, 2021, v. 200, pp. 105568.
3. Zalyhina V., et al. Pigments from spent Zn, Ni, Cu and Cd electrolytes from electroplating industry. Environmental Science and Pollution Research, 2021, v. 28, pp. 1–9.
4. Romanovski V. I. Termokhimicheskaia i mekhanokhimicheskaia pererabotka otkhodov setchatykh polimerov [Thermochemical and mechanochemical processing of cross-linked polymer wastes. Synopsis of a thesis for Ph. D. degree in Engineering. Minsk, BGTU, 2008, 178 p.].
5. Gruzinova V. L., Romanovski V. I. [Sorption properties and performance characteristics of carbon fiber materials. Construction. Applied Sciences. Engineering Networks, Ecology and Resource and Energy Conservation. Series F]. Vestnik Polotskogo Gosudarstvennogo Universiteta, 2015, no. 16, pp. 141–145. (In Russian).
6. Romanovski V. I., Gruzinova V. L. [Waste synthetic materials for oily wastewater treatment]. Vodoochistka. Vodopodgotovka. Vodosnabzhenie, 2018, no. 1, pp. 24–29. (In Russian).
7. Romanovski V. I., Gruzinova V. L. [Water-retaining properties of aggregates prepared from waste ion exchange resins. Water Engineering, Heat Power Engineering and Geoecology]. Vestnik BrGTU, 2013, no. 2, pp. 101–103. (In Russian).
8. Romanovski V. I., Gruzinova V. L. [ Surface properties of aggregates prepared from waste ion exchange resins. Water Engineering, Heat Power Engineering and Geoecology]. Vestnik BrGTU, 2013, no. 2, pp. 103–106. (In Russian).
9. Romanovski V. I. [Thermochemical and mechanochemical processing of spent synthetic ion exchangers to prepare valuable chemicals and sorption materials]. Perspektivy Nauki, 2011, no. 4, pp. 132–138. (In Russian).
10. Romanovski V. New approach for inert filtering media modification by using precipitates of deironing filters for underground water treatment. Environmental Science and Pollution Research, 2020, v. 27, pp. 31706–31714.
11. Romanovski V. I., Kryshilovich E. V., Klebeko P. A. [Preparation of ceramic materials for building purpose with the use of deironing plant wastes]. Voda Magazine, 2018, no. 2 (126), pp. 8–11. (In Russian).
12. Kamarou M., et al. Structurally controlled synthesis of calcium sulphate dihydrate from industrial wastes of spent sulphuric acid and limestone. Environmental Technology & Innovation, 2020, v. 17, pp. 100582.
13. Kamarou M., et al. Low-energy technology for producing anhydrite in the CaCO3–H2SO4–H2O system derived from industrial wastes. Journal of Chemical Technology & Biotechnology, 2021, v. 96, pp. 2065–2071.
14. Kamarou M., Korob N., Romanovski V. Structurally controlled synthesis of synthetic gypsum derived from industrial wastes: sustainable approach. Journal of Chemical Technology & Biotechnology, 2021, no. 96 (11), pp. 3134–3141.
15. Kamarou M., et al. High-quality gypsum binders based on synthetic calcium sulfate dihydrate produced from industrial wastes. Journal of Industrial and Engineering Chemistry, 2021, v. 100, pp. 324–332.
16. Romanovski V. I., Kulichik D. M., Klebeko P. A., Kryshilovich E. V. [Preparation of catalytic materials from deironing plant wastes for water and wastewater treatment]. Voda Magazine, 2017, no. 6 (118), pp. 12–15. (In Russian).
17. Romanovski V. I., Kulichik D. M., Pilipenko M. V. [Iron-zinc-containing photocatalysts from the sludge of the deironing filter wash water]. Vodoochistka, 2019, no. 4 (178), pp. 71–77. (In Russian).
18. Romanovski V. I., Kulichik D. M., Pilipenko M. V. [Iron-molybdenum-containing photocatalysts from the sludge of the deironing filter wash water]. Vodoochistka, 2019, no. 6 (180), pp. 73–78. (In Russian).
19. Romanovski V. I., Kulichik D. M., Pilipenko M. V., Romanovskaia E. V. [Iron-containing photocatalysts from the sludge of the deironing filter wash water]. Vodoochistka. Vodopodgotovka. Vodosnabzhenie, 2019, no. 4, pp. 18–22. (In Russian).
20. Gorelaia O. N., Romanovski V. I. [Sorbent for oily wastewater treatment based on the wastes of deironing plants]. Vodosnabzhenie i Sanitarnaia Tekhnika, 2020, no. 10, pp. 48–54. (In Russian).
21. Gorelaia O. N., Romanovski V. I. [Magnetic sorbent from water sludge for the purification of oily waste water. Water Engineering, Heat Power Engineering and Geoecology]. Vestnik Bresyskogo Gosudarstvennogo Tekhnicheskogo Universiteta, 2020, no. 2, pp. 61–64. (In Russian).