UDC 628.316.12
DOI 10.35776/VST.2023.11.05

Stepanov S. V., Panfilova O. N., Doubman I. S.

Results of studying the removal of heavy metal ions from industrial wastewater

Summary

The results of studies on the removal of heavy metal ions from acid-base wastewater of electroplating industry by neutralization, sedimentation and filtration are presented. During a laboratory experiment carried out with processing real acid-base wastewater of one of the enterprises in Samara with caustic soda, the optimal pH range found was 9.8–10.6. Using a flow through model of a vertical settling tank, the calculated hydraulic size of the suspension generated during the alkalization of the given wastewater category was determined that can be taken as 0.28 mm/s. The level of heavy metal ion removal in the process of galvanic wastewater treatment according to the flow scheme «pH adjustment – settling tank – filter with granular media» was experimentally determined in mg/l as: total iron 0.42–0.97; copper 0.028–0.087; nickel 0.016–0.073; zinc 0.047–0.28; cadmium 0.006–0.016. At the same time, the requirements for receiving industrial effluents into the Samara municipal sewer were met only for iron; whereas, the concentrations of other metals ranged from 0.85 to 13.3 shares of the permissible concentrations; therefore, in order to achieve the established standards, additional treatment was required, for example, by sorption.

Key words

wastewater , hydraulic size , filtration , galvanic production , heavy metal ions , neutralization

For citation: Stepanov S. V., Panfilova O. N., Dubman I. S. Results of studying the removal of heavy metal ions from industrial wastewater. Vodosnabzhenie i Sanitarnaia Tekhnika, 2023, no. 11, pp. 28–34. DOI: 10.35776/VST.2023.11.05. (In Russian).

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REFERENCES

1. Gibkie avtomatizirovannye gal’vanicheskie linii [Flexible automated galvanic lines: a reference book. Under the general editorship of V. L. Zubchenko. Moscow, Mashinostroenie Publ., 1989, 672 p.].
2. Sargin Iu. N., Nadezhdin V. A. Rekomendatsii po proektirovaniiu vodosnabzheniia i kanalizatsii tsekhov gal’vanopokrytii [Recommendations for the design of water supply and sewerage for electroplating shops. Moscow, SantekhNIIproekt Publ., 1992, 168 p.].