Journals →  Tsvetnye Metally →  2013 →  #5 →  Back

HEAVY NON-FERROUS METALS
ArticleName Sorption extraction of heavy metal ions by carbon sorbents in dynamic conditions
ArticleAuthor Domracheva V. A., Shiyrav G.
ArticleAuthorData

Irkutsk State Technical University, Irkutsk, Russia

V. A. Domracheva, Professor of a Chair of Minerals Concentration and Engineering Ecology, e-mail: domra@istu.edu
G. Shiyrav, Post-graduate Student of a Chair of Minerals Concentration and Engineering Ecology

Abstract

The problem of environmental pollution is now acquired global significance. Strengthening industrial impact on the environment has caused a number of environmental problems that cut across the habitat of living organisms. Discharge of contaminated water into water reduces the quality natural waters. The appearance in the environment of harmful substances to humans, animals, plants, and ultimately leads to disruption of dynamic ecosystems. To clean wastewater from heavy metals are used physical-chemical, chemical and other methods. The sorption acceptable method of cleaning and purification of wastewater from heavy metal ions is most effective and environmentally. Carbon sorbents are perspective sorbents with high surface area, developed pore structure, active functional groups on the surface of sorbents. The results of studies on the extraction heavy metal ions (Cu2+, Fe2+, Fe3+ and Mo6+) from aqueous solutions in dynamic conditions by carbon sorbents derived from Mongolian brown coal. To study sorption in dynamic conditions used frontal chromatographic method. For desorption metal ions and regeneration of sorbents used solutions of mineral acid (hydrochloric or sulfuric). Desorption metal ions was performed in static and dynamic sorption at temperature (20±2) оC. The processes of adsorption and desorption metal ions in dynamic conditions was carried in the column with inner diameter — 16 mm, height of the sorbent layer — 128 mm, unit load — 10 h–1 for sorption, 4 h–1 for desorption, linear sorption rate — 1,27 m/h, desorption — 0,64 m/h, initial concentration of metals — 5,7 mg/l. Dynamic exchange capacity (DEC) activated carbon ABB (AББ) in relation to metal ions, mg/g: 4,3 Cu (II); 2,9 Fe (II); 2,41 Fe (III); 1,82 Mo (IV). DEC activated carbon ABSh (AБШ) in relation to metal ions, mg/g: 2,45 Cu (II); 1,88 Fe (II); 2,08 Fe (III); 1,18 Mo (IV). Sorption activity of sorbent ABB by metals is much higher than the sorbent ABSh. Total exchange capacity activated carbon ABB in relation to metal ions, mg/g: 5,0 Cu (II); 4,46 Fe (II); 3,6 Fe (III); 2,25 Mo (IV), TEC activated carbon ABSh in relation to metal ions, mg/g: 3,02 Cu (II); 3,5 Fe (II); 2,45 Fe (III); 1,97 Mo (IV). Desorption metal ions and regeneration sorbent was performed by solutions of mineral acid. Using the 4% hydrochloric acid make it possible maximum extraction of metal ions.

keywords Carbon sorbent, sorption, desorption, regeneration, dynamic exchange capacity, total exchange capacity, the output curves of sorption
References

1. Ariunaa A., Dugarzhav Zh., Patrakov Yu. F. et al. Poluchenie uglerodnykh sorbentov iz nizkometamorfizovannykh ugley Alagtogiynskogo i Nariyn-Sukhaytskogo mestorozhdeniy Mongolii (Obtaining of carbon sorbents from low metamorphosed coals of Alag Tolgoi and Nariin Sukhait Coal Mines (Mongolia)). Materialy mezhdunarodnoy konferentsii “Chistaya voda – 2009” (Materials of International conference “Pure water – 2009”). Kemerovo, 2009. pp. 347–349.
2. Jia Y. F., Thomas K. M. Adsorption of cadmium ions on oxygen surface sites in activated carbon. Langmuir. 2000. Vol. 16. pp. 1114–1122.
3. Smirnov A. D. Sorbtsionnaya ochistka vody (Sorption purification of water). Leningrad : Khimiya, 1982. 168 p.
4. Pokonova Yu. V. Khimiya tverdogo topliva — Solid Fuel Chemistry. 2000. No. 1. pp. 15–19.
5. Perederiy M. A., Noskova Yu. A. Khimiya tverdogo topliva — Solid Fuel Chemistry. 2008. No. 4. pp. 30–36.
6. Kambarova G. B., Sarymsakov Sh. Khimiya tverdogo topliva — Solid Fuel Chemistry. 2008. No. 3. pp. 42–46.
7. Domracheva V. A., Shiyrav G. Vestnik Irkutskogo gosudarstvennogo tekhnicheskogo universiteta — Vestnik of Irkutsk State Technical University. 2011. No. 7. pp. 73–79.
8. Domracheva V. A., Trusova V. V., Shiyrav G. Issledovanie sorbtsii tyazhelykh metallov i nefteproduktov uglerodnymi sorbentami na osnove burykh ugley (Research of sorption of heavy metals and oil products by carbon sorbents, on the basis of brown coals). Materialy VIII mezhdunarodnoy nauchno-prakticheskoy konferentsii “Tekushchie issledovaniya i razvitie – 2012” (Materials of the VIII international scientific and practical conference “Current researches and development – 2012”). Sofia, 2012. Vol. 18. pp. 14–18.
9. Tekhnologicheskaya instruktsiya kompanii s ogranichennoy otvetstvennostyu “Erdenet” (Instruction manual of “Erdenet” Mining Corporation). Erdenet, 2008. pp. 12–23, 31.
10. Domracheva V. A., Shiyrav G. Ekologicheskie problemy kompanii s ogranichennoy otvetstvennostyu “Erdenet” i puti ikh resheniya (Ecological problems of “Erdenet” Mining Corporation and ways of their solving). Materialy mezhdunarodnogo soveshchaniya “Plaksinskie chteniya – 2010” (Materials of international meeting “Plaksin readings – 2010”). Kazan, 2010. pp. 467–470.
11. Rodriguez-Reinoso F. Preparation and characterization of activated carbons. Carbon and Coal Gasification. Under the editorship of J. L. Figueinedo, J. A. Moulijin. Dordrecht : Martinis Nichols Abolishers, 1986. pp. 601–643.
12. Keltsev N. V. Osnovy adsorbtsionnoy tekhniki (Basis of adsorption technics). Second edition, revised and enlarged. Moscow : Khimiya, 1984. 592 p.

Language of full-text russian
Full content Buy
Back