Baloš, Milica

Jakšić, Sandra

Maletic, Snezana

Mihaljev, Željko

Popov, Nenad

Rončević, Srđan

Varga, Nataša

Popov Nenad

Rončević Srđan

Maletic Snezana

Varga Nataša

Jakšić Sandra

Mihaljev Željko

Baloš Milica

University of Szeged

 25th International Symposium on Analytical and Environmental Problems 231 THE APPLICATION OF CARBONIZED ASH FOR THE SOLIDIFICATION AND STABILIZATION OF SEDIMENT WITH HIGH CONTENT OF Zn AND As  Nenad Popov1, Srđan Rončević2, Snežana Maletić2, Nataša Varga2, Sandra Jakšić1, Željko Mihaljev1, Milica Živkov Baloš1  1Scientific Veterinary Institute „Novi Sad“, Rumenački put 20, Novi Sad, Serbia 2University of Novi Sad Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia    nenad.p@niv.ns.ac.rs  Abstract Large quantities of ash generated by combustion of biomass require a sustainable management strategy [1]. The chemical composition of ash includes heavy metals that classified this kind of material as toxic waste. Accumulation of heavy metals as persistent and toxic substances in sediment can cause potential ecological risks [2]. The characteristics of sediment and examination of level of metal content can determine whether its remediation is necessary. The highest applicable technique of sediment remediation is solidification/stabilization (S/S). The application of this technique results in immobilization of pollutants into less soluble forms less available to the living world [3]. The ash produced by combustion of sunflower stem, after carbonization, was applied as a potential immobilization agent for the solidification/stabilization treatment of the sediment of the Greater Backa Canal. Carbonization causes decrease in leaching of metals by forming new adsorption zones and lowers porosity of a solidifier [4]. The results of the analyses showed that CO2 combined with (OH)2 forms CaCO3, while in the combination with heavy metal oxides it forms their carbonates [5]. This paper presents the preliminary results of single step leaching test DIN 3841-4 S4 [6], and TCLP [7], which were used for testing newly formed mixture of sediment and non-carbonized/carbonized ash. The value of Zn and As concentrations in the eluates of the tested samples was monitored for successful evaluation of the treatment efficiency and risk assessment of newly emerging waste for human health and the environment.  Acknowledgments The authors acknowledge financial support of the Ministry of Education, Science and Technological Development of the Republic of Serbia (Project No. 31011).  References [1] Izquierdo M., Moreno N.,  Font O., Querol X., Alvarez E. D., Nugteren H., Luna Y., Fernández-Pereira  C. Fuel 87, 1958–1966, (2008). [2] Dalmacija M. PhD thesis, Faculty of Science, University of Novi Sad, 18, (2010). [3] Hunce S. Y., Akgul D., Demir G., and Mertoglu B. Waste Management 32(7), 1394–1400, (2012). [4] Halim C. E., Amal R., Beydoun D., Scott A. J., Low G. Cement and Concrete Research 34(7), 1093-1102, (2004). [5] Jianguo J., Maozhe C., Yan Z., Xin X.  Journal of Environmental Management 128,  807-821, (2013). [6] DIN 38414 S4 Beuth Verlag. Berlin, (1984). [7] US EPA SW-846 Test Method 1311. Environmental Protection Agency 35, (1992).   

The application of carbonized ash for the solidification and stabilization of sediment with high content of Zn and As

http://acta.bibl.u-szeged.hu/64833/1/proceedings_of_isaep_2019_231.pdf

The application of carbonized ash for the solidification and stabilization of sediment with high content of Zn and As

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