XLIX SAVETOVANJE SRPSKOG HEMIJSKOG DRUŠTVA

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Srpsko hemijsko društvo Serbian Chemical Society XLIX SAVETOVANJE SRPSKOG HEMIJSKOG DRUŠTVA PROGRAM I KRATKI IZVODI RADOVA 49 th Meeting of the Serbian Chemical Society Programme & Book of Abstracts Kragujevac, 13-14. maj 2011. Kragujevac Serbia, May 13-14, 2010

CIP -, 54(048) 66(048) ( ). (49 ; 2011 ; ) Program ; #i #Kratki izvodi radova = Programme = #& #Book of Abstracts / XLIX savetovanje Srpskog hemijskog društva, Kragujevac, 13-14. maj 2011. = 49th Meeting of the Serbian Chemical Society, Kragujevac, Serbia, May 13-14, 2011 ; [organizator] Srpsko hemijsko društvo = [organized by] Serbian Chemical Society ; [urednici, editors Živoslav Teši, Miloš uran, Aleksandar Dekanski]. - Beograd : Srpsko hemijsko društvo = Serbian Chemical Society, 2011 (Beograd : Razvojno-istraživa ki centar grafi kog inženjerstva TMF). - XIII, 162 str.: graf. prikazi ; 24 cm Radovi uporedo na srp. i engl. jeziku. - Tekst ir. i lat. - Tiraž 200. Napomene i bibliografske reference uz tekst. ISBN 978-86-7132-045-0 1. ( ) a) - b) - COBISS.SR-ID 183591692 XLIX SAVETOVANJE SRPSKOG HEMIJSKOG DRUŠTVA, KRAGUJEVAC, 13-14. MAJ 2011. PROGRAM I KRATKI IZVODI RADOVA 49 TH MEETING OF THE SERBIAN CHEMICAL SOCIETY,KRAGUJEVAC, SERBIA, MAY 13-14, 2011 PROGRAMME AND BOOK OF ABSTRACTS Izdaje / Published by Srpsko hemijsko društvo / Serbian Chemical Society Karnegijeva 4/III, 11000 Beograd, Srbija tel./fax: +381 11 3370 467; www.shd.org.rs, E-mail: Office@shd.org.rs Za izdava a / For Publisher Ivanka POPOVI, predsednik Društva Urednici / Editors Živoslav TEŠI Miloš URAN Aleksandar DEKANSKI Dizajn korica, slog i kompjuterska obrada teksta /Cover Design, Page Making and Computer Layout Aleksandar Dekanski Tiraž / Circulation : 200 primeraka / 200 Copy Printing ISBN 978-86-7132-045-0 Štampa / Printing Razvojno-istraživa ki centar grafi kog inženjerstva, Tehnološko-metalurški fakultet, Karnegijeva 4, Beograd, Srbija

Nau ni Odbor Scientific Committee Živoslav TEŠI, predsednik (chair) Jelena BAJAT Živadin BUGAR I Tanja IRKOVI VELI KOVI Jasna ONLAGI Miloš URAN Ivan Gutman Ivanka HOLCLAJTNER ANTUNOVI Zorica KNEŽEVI JUGOVI Branko MATOVI Dragana Mili Dušanka MILOJKOVI OPSENICA Sr an PEJANOVI Velimir POPSAVIN Bojan RADAK Maja RADETI Nenad RADOVI Niko RADULOVI Dragica TRIVI Sre ko TRIFUNOVI Rastko VUKI EVI Organizacioni Odbor Organising Committee Miloš URAN, predsednik (chair) Aleksandar DEKANSKI Zoran MATOVI Biljana PETROVI Zorica PETROVI Snežana RAJKOVI Zorka STANI

XLIX savetovanje Srpskog hemijskog društva BT05-P Bakterijsko luženje metala iz elektronskog otpada pomoću At. ferrooxidans Vladimir P. Beškoski*, Jelena S. Milić*, Latinka J. Slavković-Beškoski** Biljana P. Dojčinović*, Miroslav M. Vrvić* *** *IHTM-Centar za hemiju, Studentski trg 12-16, 11000 Beograd, Srbija **Institut za nuklearne nauke Vinča, P.Fah 522, Beograd, Srbija ***Hemijski fakultet, Univerzitet u Beogradu, Studentski trg 12-16, 11000 Beograd, Srbija Reciklaža elektronskog otpada je pirometalurški ili hidrometalurški proces koji izaziva zagadjenje vazduha emisijom toksičnih jedinjenja u atmosferu. U ovom radu su prikazani rezultati bakterijskog luženja metala (Cu, Sn, Ni, Zn i Ag) iz matičnih ploča personalnih računara pomoću soja Acidithiobacillus ferrooxidans izolovanog iz odlagališta jalovine rudnika bakra Bor. Eksperimenti su uradjeni u podlozi 9K ( 9 gfe 2+ /L) inokulisanoj sa At. ferrooxidans u poredjenju sa abiotičkom kontrolom. Odnos podloge i supstrata (isečeni elektronski otpad) bio je 1:100 (m/v). Eksperiment je trajao 14 dana na temperaturi 28 ⁰CC uz mešanje na rotacionoj mešalici. Koncentracija metala u rastvoru je odredjivana pomoću ICP. Po isteku eksperimenta, u uzoraku u kome je bakterijski generisani Fe(III)-jon visoka koncentracija metala u rastvoru ukazuje na snažno oksidaciono dejstvo Fe(III)-jona u kiseloj sredini. To potvrdjuju i koncentracije metala odredjene u kontrolnoj probi koji su za 10 puta manje u odnosu na biotički uzorak. Dobijeni rezultati pokazali su velikii potencijal čistih mezofilnih kultura At. ferrooxidans za rastvaranje/luženje metala iz elektronskog otpada. Bacterial leaching of metals from electronic waste by At. Ferrooxidans Vladimir P. Beškoski*, Jelena S. Milić*, Latinka Slavković-Beškoski** Biljana Dojčinović*, Miroslav M. Vrvić** ** *IChTM-Department of Chemistry, Studentski trg 12-16, 11000 Belgrade, Serbia **Institute of nuclear sciences Vinča, P.Fah 522, Beograd, Serbia ***Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia Re-cyclicing of electronic waste is either pyrometallurgical or hydrometallurgicall which generate atmospheric pollution by releasing toxic compounds into the atmosphere. This paper presented results of bacterial leaching of metals (Cu, Sn, Ni, Zn and Ag) from printed circuit boards using Acidithiobacillus ferrooxidans isolated from copper mine dump Bor. Experimental flasks contained 9K medium (9 gfe 2+ /L) inoculated with At. ferrooxidans, and compared with abiotic control medium. In all solutions shredded electronic waste were added with pulpe density 1:100 (m:v). The experiments were run in rotary shaker, for 14 days at 28⁰C. The amounts of released metals were determined by ICP. At the end of experiment, in test solution in which Fe(III)-ion has been produced microbiologicaly, high concentrations od metals in solutions indicated the oxidation role of Fe(III)-ions in acid environment, which is confirmed by 10 fold lower metals concetration in abiotic control. The presented results showed great potential of pure mesophile bacteria culture At. ferrooxidans to bring metals into solution from electronic waste. 102

Bakterijsko luženje metala iz elektronskog otpada pomoću At. ferrooxidans Vladimir P. Beškoski*, Jelena S. Milić*#, Latinka J. SlavkovićBeškoski**, Biljana P. Dojčinović*, Miroslav M. Vrvić*** *IHTM-Centar za hemiju, Studentski trg 12-16, 11000 Beograd ** Institut za nuklearne nauke Vinča, P.Fah 522, Beograd ***Hemijski fakultet, Univerzitet u Beogradu, Studentski trg 12-16, 11000 Beograd #jelena_milic@yahoo.com UVOD Brzi razvoj tehnologije, mali inicijalni troškovi kupovine i konstantno zastarevanje modela i pojavljivanje novih rezultuje sve većim količinama električnog i elektronskog (EE) otpada. Procenjuje se da se u svetu godišnje u proseku proizvede 50 miliona tona EE otpada. Reciklaža elektronskog otpada je pirometalurški ili hidrometalurški proces koji izaziva zagadjenje vazduha emisijom toksičnih jedinjenja u atmosferu, te biološko luženje može predstavljati metodu izbora za reciklažu ovakvog otpada [1]. U ovom radu je ispitano biološko luženje metala (Cu, Sn, Ni, Zn i Ag) iz matičnih ploča personalnih računara pomoću Acidithiobacillus ferrooxidans (At. ferrooxidans). MATERIJAL I METODE Eksperimenti su uradjeni u podlozi 9K (9 g Fe2+/L) inokulisanoj sa At. ferrooxidans izolovanim iz odlagališta jalovine rudnika bakra Bor, u poredjenju sa abiotičkim kontrolama (podloga 9K, podloga 9K bez sumporne kiseline, 0K-podloga bez Fe). Odnos podloga i supstrata (isečeni elektronski otpad) bio je 1:100 (m/v). Eksperiment je trajao 14 dana na temperaturi 28⁰C uz mešanje na rotacionoj mešalici. Koncentracija metala u rastvoru je odredjivana pomoću ICP (Thermo Scientific icap 6500 Duo ICP, Cambridge, United Kingdom), na sledećim talasnim dužinama (nm): Cu (324,7), Sn (190,0), Ni (221,6), Zn (221,6) i Ag (328,1). REZULTATI I DISKUSIJA Na Slici 1. su prikazani odnosi koncentracija izluženih metala u uzorcima 1 (9K podloga inokulisana sa At. ferrooxidans), 2 (sterilne podloge 9K), 3 (9K podloga bez sumporne kiseline )i 4 (0K; ph 2,5). Cu Sn Ni Zn Ag Slika 1. Odnos koncentracija izluženih metala (Cu, Sn, Ni, Zn i Ag) posle 14 dana eksperimenta. Po isteku eksperimenta, u uzoraku 1,u kome je bakterijski generisani Fe(III)-jon visoka koncentracija metala u rastvoru ukazuje na snažno oksidaciono dejstvo Fe3+ u kiseloj sredini. To potvrdjuju i koncentracije metala odredjene u kontrolnim probama koji su za 10 puta manje u odnosu na biotički uzorak. Kao što je i očekivano Fe3+ igra ključnu ulogu (uzorci 1 i 3) u procesu rastvaranja metala iz komadića matične ploče. ZAKLJUČAK Dobijeni rezultati pokazali su veliki potencijal čistih mezofilnih kultura At. ferrooxidans za rastvaranje/luženje metala iz elektronskog otpada. REFERENCE 1. H. Brandl, R. Bosshard, M. Wegmann, Computer-munching microbes: metal leaching from electronic scrap by bacteria and fungi, Hydrometallurgy 59, (2001) 319 326 2.G.Gojgić-Cvijović, M.M. Vrvić, Praktikum za mikrobiološku hemiju, Beograd, 2003