HIGH-EFFECTIVE TECHNOLOGY FOR THE NEUTRALIZATION OF Cr (VI)-CONTAINING WASHWATER OF ELECTROCHEMICAL PLANTS
DOI:
https://doi.org/10.24025/2306-4412.4.2019.185446Keywords:
wastewater, Cr (VI), reagent neutralization, temperature, residual concentration, purified water, rate of separationAbstract
The protection of aquatic environment from pollutions, the most dangerous of which is wastewater containing heavy and non-ferrous metals is one of the most important environmental issues. The processes of electrochemical chromium plating are accompanied by the formation of sewage and washwater containing compounds of highly toxic Cr6 +. However, chromium is of great value in industrial wastewater, and its extraction and reuse in manufacturing can have a significant economic impact. The discharge of such water into surface water bodies without prior purification to the maximum permissible concentrations is prohibited. At present, there are no universal methods of cleaning industrial wastewater from chromium. Various methods, such as: reagent, electro- and galvano-coagulation, ion-exchange, electrodialysis, sorption, membrane separation, biological ones, etc. are used for wastewater treatment. Each of these methods has its own advantages and disadvantages. The analysis of existing methods for the neutralization of chrome-containing spent solutions is described. The work is devoted to the development of technology for the neutralization of Cr (VI)-containing washwater of electrochemical plants. Aqueous solution of barium (II) hydroxide as a precipitating reagent is proposed to be used. The temperature of the purification process and the excess reagent-precipitator to obtain a residual concentration of Cr (VI) in purified water at the level of MPC and the maximum rate of delamination of the suspension are experimentally substantiated. Considering that the highest rates of suspension separation are observed in the temperature range 30÷50 °С, the temperature 25÷35 °С and the excess of precipitant 40÷50 % should be considered the most optimal regime for the process of purification of solutions from Cr6+ compounds.
References
Yu. P. Perelygin, O. V. Zorkina, I. V. Rashevskaya, et al., Reagent wastewater treatment and disposal of waste solutions and sediments of galvanic production: textbook. Penza: Izd-vo PGU, 2013 [in Russian].
S. S. Vinogradov, Environmentally friendly galvanic production, prof. V. N. Kudryav-ceva, Ed., 2nd ed. Moscow: Globus, 2002 [in Russian].
M. M. Shorohov, M. A. Ozheredova, and O. V. Suvorin, "Influence of the type of precipitator on the efficiency of purification of Cr6+-contaminated wastewater of industrial enterprises", Perspectives of science and education: Proc. 3rd Int. Youth Conf. SLOVOWORD, New York, USA, 2018, рр. 235-244 [in Ukrainian].
R. A. Khaydarov, R. R. Khaydarov, and O. O. Gapurova, "Water purification from metal ion using carbon nanoparticle-conjugated polymer nanocomposites", Water Research, vol. 44, no. 6, pp. 1927-1933, 2010.
M. Vukĉević et al., "Carbon materials from waste shot hemp fibers as a sorbent for heavy metal ions – Mathematical modeling of sorbent structure and ions transport", Chemscal Engineering Journal, vol. 235, no. 1, pp. 284-292, 2014.
С. Jung et al., "Hexavalent chromium removal by various adsorbents: Powdered activated carbon, chitosan, and single/multi-walled carbon", Separation and Purification Technology, vol. 106, pp. 63-71, 2013.
A. M. Sarsenov, A. K. Kazbekova, N. A. Usenova, and U. A. Esengulov, "Wastewater treatment of chromium (III) ions on iron (III) phosphate", Geologiya, geografiya i globalnaya energiya, no. 4, pp. 97-101, 2010 [in Russian].
K. L. Timofeev, and L. F. Akulich, "Sorption extraction of heavy metals from industrial wastes", Vodoochistka. Vodopodgotovka. Vodosnabzhenie, no. 11, pp. 26-30, 2012 [in Russian].
E. Bazrafshan, Н. Mahvi, S. Naseri, and A. Mesdaghinia, "Performance evaluation of electrocoagulation process for removal of chromium (VI) from synthetic chromium solutions using iron and aluminum electrodes", Turk. J. Eng. Environ. Sci., vol. 32, pp. 59-66, 2008.
S. Hamdan, and M. H. El-Naas, "Characterization of the removal of Chromium (VI) from groundwater by electrocoagulation", Journal of Industrial and Engineering Chemistry, vol. 20, pp. 2775-2781, 2014.
S. S. Vinogradov, and S. S. Kruglikov, "On the positive and negative aspects of electro- and galvanocoagulation methods of wastewater treatment", Galvanotehnika i obrabotka poverhnosti, vol. 16, no. 1, pp. 46-47, 2008 [in Russian].
M. S. Bhatti, A. S. Reddy, and A. K. Thuk-ral, "Electrocoagulation removal of Cr (VI) from simulated wastewater using response surface methodology", Hazard. Mater, vol. 172, pp. 839-846, 2009.
Yu. P. Hranilov, Ecology and electro-plating: problems and solutions. Kirov: VyatGTU, 2000 [in Russian].
A. Yu. Tokar, "Membrane separation pro-cesses", Mezhdunarodnyj nauchno-issledovatelskij zhurnal, no. 1, pp. 94-96, 2014 [in Russian].
К. Kolomaznik, M. Barinova, and H. Vaskova, "Chromium VI іssue in leather waste", International Journal of Mathematics and Computers in Simulation, vol. 6, no. 5, pp. 447-455, 2012.
P. Kocurek, K. Kolomazník, and M. Baři-nová, "Chromium removal from wastewater by reverse osmosis", Wseas transactions on environment and development, vol. 10, pp. 358-365, 2014.
Z. Kaili, W. Xiuju, Zhun, Lu Xingjie, W. Zhongpeng, and W. Liguo, "Preparation and characterization of modified polyvinyl-idene fluoride/2-amino-4-thiazoleacetic acid ultrafiltration membrane for purification of Cr(VI) in water", Journal of chemical engi-neering of Japan, vol. 51, pp. 501-506, 2018.
D. A. Krivoshein, P. P. Kukin, and V. L. Lapin, Engineering protection of surface waters from industrial effluents. Moscow: Vysshaya shkola, 2003 [in Russian].
G. O. Gorshkova, T. V. Gudzenko, V. O. Ivanicya, and O. V. Volyuvach, "A method of purifying water from chromium (VI) in the presence of microorganisms", ScienceRise: sci. journ., no. 9, pp. 57-60, 2015 [in Ukrainian].
B. N. Laskorin, B. V. Gromov, A. P. Cygan-kov, and V. N. Senin, Problems of development of non-waste production. Moscow: Strojizdat, 2005 [in Russian].
N. F. Kleshev, T. D. Kostyrkina, G. S. Bes-kova, and E. T. Morgunova, Analytical control in the main chemical industry. Moscow: Himiya, 1992 [in Russian].
E. D. Shukin, A. V. Percov, and E. A. Ame-lina, Colloid chemistry. Moscow: Vysshaya shkola, 2004 [in Russian].
Chromium (VI) handbook / [written by Independent Environmental Technical Evaluation Group (IETEG)]; James A. Jacobs, Jac-ques Guertin, Cynthia Avakian, Eds. CRC Press, 2005.
Downloads
Published
How to Cite
Issue
Section
URN
License
Copyright (c) 2020 Олександр Вікторович Суворін, Михайло Миколайович Шорохов, Марина Анатоліївна Ожередова, Євген Іванович Зубцов The authors who publish in this journal agree to the following terms:The authors reserve the right to authorship of their work and give the journal the right to first publish this work under the terms of the Creative Commons Attribution License CC BY-NC, which allows other persons to freely distribute published work with a mandatory reference to authors of the original work and the first publication of the work in this journal.
Authors have the right to conclude separate additional agreements for the non-exclusive distribution of the paper in the form in which it was published by this journal (for example, posting work in electronic repository or publishing as part of a monograph), provided that the link to the first publication in this journal is maintained.
The journal policy allows and encourages authors to post on the Internet (for example, in repositories of institutions or on personal websites) the manuscript of work, both before the submission of this manuscript to the editorial staff, and during its editorial work, as it contributes to the emergence of productive scientific discussion and positively affects the efficiency and dynamics of published work citation (see The Effect of Open Access).
