Vezanje iona cinka na zeolitu u prisustvu otopine Humistar r različitih koncentracija i pH vrijednosti : diplomski rad ; Binding of zinc ions onto zeolite in the presence of Humistar r soution of different concentrations and pH values : diploma thesis

U ovome radu ispitano je vezanje iona cinka na prirodnom zeolitu klinoptolitu u prisutnosti otopine Humistar ® različitih početnih koncentracija i pH vrijednosti. Humistar ® je komercijalni naziv za proizvod tvrtke Trade Corporation International S.A. koji ima veliki udio huminskih kiselina i organskih spojeva te simulira organske tvari koje se prirodno nalaze u tlu. Ispitivanje ponašanja cinkovih iona u otopini huminske kiseline ne ukazuje na formiranje metalno-organskih kompleksa i ne dolazi do taloženja cinkovog hidroksida. Dodatak Humistar ® preparata ne utječe značajno na stupanj vezanja i količinu vezanog cinka po gramu zeolita. Rezultati pokazuju blago povećanje uklanjanja u kiselom mediju u odnosu na kontrolnu otopinu. ; In this work, the binding of zinc ions on the natural zeolite clinoptolite in the presence of Humistar ® solutions of different initial concentrations and pH values have been examined. Humistar ® is a commercial name for a product of Trade Corporation International S.A. which has a large content of humic acids and organic compounds and simulates organic substances naturally present in the soil. Examination of the behavior of zinc ions in the humic acid solution does not indicate the formation of metal-organic complexes and precipitation of zinc in form of zinc hydroxide. The binding of zinc ions on zeolite in Humistar ® solutions indicates that the addition of Humistar ® does not significantly affect removal efficiency and the amount of zinc bound per gram of zeolite. Overall removal of zinc ions is slightly increased in the acidic medium.