EXTRACTION OF PHOSPHATES FROM WASTE WATER OF CALCIUM-SILICATE-CONTAINING MATERIALS

UDC 628.316.12:661.183.6

  • Vasileuski Andrei Syargeyevich – PhD student, the Department of Industrial Ecology. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: аndrey-wasilewskiy@mail.ru

  • Voitau Ihar Vital’evich – DSc (Engineering), Professor, Rector. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: rector@belstu.by

DOI: https://doi.org/10.52065/2520-2669-2021-247-2-199-204

Key words: phosphates, tripoli, chalk, waste water, adsorption, sorption material.

For citation: Vasileuski A. S., Voitau I. V. Extraction of phosphates from waste water of calciumsilicate-containing materials. Proceedings of BSTU, issue 2, Chemical Engineering, Biotechnologies, Geoecology, 2021, no. 2 (247), pp. 199–204 (In Russian). DOI: https://doi.org/10.52065/2520-2669-2021-247-2-199-204.

Abstract

A material has been developed, based on the tripoli – chalk system, which has adsorption properties for the extraction of phosphates from wastewater. It is shown that the degree of adsorption of phosphates from wastewater reaches 99.8%, and depends on the parameters of the synthesis of the adsorbent and the technological regime of wastewater treatment. The phase (CaO, SiO2, CaO · SiO2, CaO · Al2O3 · 2SiO2) and chemical (54% SiO2, 33% CaO, 6% Al2O3, etc.) composition of the sorption material. The specific surface area and specific pore volume of the sorption material is 88 m 2/g and 0.126 cm 3/g, respectively. The maximum sorption capacity for phosphates in terms of phosphorus is 79.6 mg P/g. The resulting sorbent retains the degree of adsorption above 90% during 5 cycles of waste water treatment. The used adsorbent contains calcium phosphate, hydroxyapatite and brushite. The moisture content of the spent adsorbent is 89%. The content of phosphates in terms of phosphorus in the dry matter of the spent adsorbent is 3 wt. %.

Download

References

  1. Dolina L. F. Ochistka stochnykh vod ot biogennykh elementov: monografiya [Wastewater treatment from biogenic elements: monograph]. Dnepropetrovsk, Continent Publ., 2011. 198 p.
  2. Mikosz J., Mucha Z. Validation of design assumptions for small wastewater treatment plant modernization in line with new interpretation of legal requirements. Ochrona Srodowiska, 2014, no. 36 (1), pp. 45–49.
  3. Gogina E. S. Udaleniye biogennykh elementov iz stochnykh vod [Removal of nutrients from wastewater]. Moscow, 2010. 120 p.
  4. TKP 17.06-08-2012 (02120). Environmental protection and nature management. Hydrosphere. The procedure for establishing standards for permissible discharges of chemical and other substances in wastewater. Minsk, Minprirody Publ., 2012. 73 p. (In Russian).
  5. Philips H., Kobylinsku E., Barnard J., Wallis-Lage C. Nitrogen and Phosphorus-Rich Sidestreams: Managing the Nutrient Merry-Go-Round. Proceedings of the Water Environment Federation, 2006, no. 7, pp. 5282–5304.
  6. Cordell D., Rosemarin A., Schroder J., Smit A. Towards global phosphorus security: A systems framework for phosphorus recovery and reuse options. Chemospher, 2011, vol. 84, no. 6, pp. 747–758.
  7. Sedlak R. Phosphorus and nitrogen removal from municipal wastewater. Principles and Practice. New York, Lewis Publishers, 1991. 256 p.
  8. Bird S. C., Drizo A. Investigations on phosphorus recovery and reuse as soil amendment from electric arc furnace slag filters. J. Environ. Sci. and Health. Part A, 2009, vol. 44, no. 13, pp. 1476–1483.
  9. Renman A., Renman G. Long-term phosphate removal by the calcium-silicate material Polonite in wastewater filtration systems. Chemosphere, 2010, vol. 79, pp. 659–664.
  10. Vasileuski A. S., Voitau I. V. Obtaining materials for purification of waste water from phosphates. Trudy BGTU [Proceedings of BSTU], issue 2, Chemical Engineering, Biotechnologies, Geoecology, 2020, no. 2, pp. 169–175 (In Russian).
  11. STB ISO 6878–2005. Water quality. Determination of phosphorus. Spectrometric method with ammonium molybdate. Minsk, BelGIM Publ., 2005. 20 p. (In Russian).
  12. Babkova N. M. Fizicheskaya khimiya tugoplavkikh nemetalicheskikh i silikatnykh materialov [Physical chemistry of refractory non-metallic and silicate materials]. Minsk, Vysheyshaya shkola Publ., 2007. 301 p.
  13. Kuznetsova T. V., Kudryashov I. V., Timashev V. V. Fizicheskaya khimiya vyazhushchikh materialov [Physical chemistry of binders]. Moscow, Vysshaya shkola Publ., 1989. 384 p.
  14. Spravochnik po khimii tsementa [Handbook on the chemistry of cement]. Edit. by B. V. Volkonsky, L. G. Sudakas. Leningrad, Stroyizdat Publ., 1980. 223 p.
30.04.2021