20.500.12556/DKUM-71558 Biosorpcija Cr6+ ionov na imobilizirani mešanici alg na alginatnih nosilcih Biosorption of Cr6+ ions on immobilized algae mixture on alginate beads Težke kovine so kot posledica stranskih produktov številnih industrij ena izmed največjih onesnažil pitnih vod po svetu. Eden izmed onesnaževalcev je šestvalentni krom, katerega odstranjevanje iz vode je težje in dokaj neraziskano. V ta namen smo na nosilce iz kalcijevega alginata imobilizirali mešanico treh vrst alg, Spirulina, Chlorella in Litothamnium iz kapsul NutriLab. V študiji smo se odločili za uporabo neživih organizmov, saj je bilo v prejšnjih raziskavah ugotovljeno, da je krom zelo strupen za žive organizme. Prav tako smo preverili, ali bo učinkovitost večja z sinergijo treh vrst alg. Z imobilizacijo je bilo omogočeno predvsem lažje ločevanje biosorbenta od vodne raztopine kromovih ionov. Mešanico alg smo zdrobili v prah in imobilizirali z 2 % raztopino alginata, ki smo jo zamrežili z 2 % CaCl2 in nato izvedli eksperimente biosorpcije kovinskih ionov Cr6+. Delovne raztopine Cr6+ smo pripravili z redčenjem osnovne standardne raztopine. Rezultati so pokazali, da na biosorpcijo močno vpliva pH vrednost raztopine in temperatura, pri kateri biosorpcija poteka. Heavy metals are one of the main pollutants of drinking water in the world as side products of many industries. One of many pollutants is hexavalent chromium whose removal from water is more difficult and less researched. The mixture of three different species of algae, Spirulina, Chlorella and Litothamnium from capsules NutriLab was immobilized on calcium alginate. In the following study, we focused on the use of dead biomass because in other research scientists discovered chromium to be very toxic to the living organisms. We tested if the effect would be higher relying on the synergy of the three different algae species as well. By immobilization, we enabled easier separation of the biosorbent and the solution of chromium ions. The mixture of algae was crushed in powder and immobilized with a 2 % solution of alginate, which was entrapped with 2 % CaCl2. Then the experiments of biosorption of Cr6+ were performed. Working Cr6+ solutions were made with a dilution of the basic solution. The experimental results showed that the most influential factors on biosorption are the pH value and the temperature at which the tests were performed. Imobilizacija alginatni nosilci alge šestvalentni krom pitna voda Immobilization alginate beads algae hexavalent chromium drinking water true true false [N. jančič] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2018-08-21 18:59:04 2018-09-06 12:45:49 2022-08-01 21:03:36 2019-07-11 18:46:42 2018 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 664.664.7(043.2) 21949718 URN:SI:UM:DK:GBR57SIN UN_Jancic_Natalija_2018.pdf UN_Jancic_Natalija_2018.pdf 1 BB1702DF40164EB038BC57089958188B 2be82e16fec45f9d6c0b5f72938f0963b569cc335444647a187643d26ab6cfad 41c9bcec-7c10-11eb-bb7a-00155d0001ca 20.500.12556/dkum/27c5b590-298e-48bd-9611-eee2cabcd5b6 https://dk.um.si/Dokument.php?lang=slv&id=128699 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0