Emisijska plazma spektrometrija u analizi sorpcije kroma na nanočesticama željeza

master's thesis

• Title (english): Emission plasma spectrometry in analysis of chromium sorption on iron nanoparticles
• Author: Leontina Toth
• Mentor: Sanda Rončević (mentor)
• Committee member: Sanda Rončević (predsjednik povjerenstva)
• Committee member: Biserka Prugovečki (član povjerenstva)
• Committee member: Ines Primožič (član povjerenstva)
• Committee member: Predrag Novak (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2016-09-29, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

Emisijskom plazma spektrometrijom analiziran je sadržaj kroma u modelnim vodenim otopinama nakon sorpcije Cr(VI) na neutralnim nanočesticama željeza (nZVI). Pri tome su prethodno sintetizirane nanočestice željeza postupkom redukcije s NaBH4 koje su korištene u eksperimentima te im je ispitana čistoća obzirom na sadržaj ostalih metala metodom ICPAES. Uspoređene su djelotvornosti uklanjanja Cr(VI) iz vodenih otopina sa i bez modifikacije s 1,5-difenilkarbazidom kao kompleksirajućim reagensom i promjena u efikasnosti uklanjanja Cr(VI). U koncentracijskom području 1-5 mg L-1 Cr(VI) uz dodatak kompleksirajućeg reagensa utvrđena je bolja efikasnost uklanjanja (96%) u odnosu na otopine bez dodatka liganda. Pri većim sadržajima Cr(VI) u modelnim otopinama manje su izražene varijacije u efikasnosti uklanjanja u odnosu na otopine bez dodataka 1,5- difenilkarbazida.

Abstract (english)

The content of Cr(VI) in model aqueous solutions after sorption of Cr(VI) on zero valent iron nanoparticles (nZVI) was analysed with emission plasma spectrometry. The iron nanoparticles were prepared by reduction method with NaBH4 and used in experiment, their purity was examined considering the content of other metals using ICP-AES. The efficiency of Cr(VI) removal from aqueous solutions was compared with and without modification by 1,5-diphenylcarbazide as a complexing reagent. In concentration range 1-5 mg L-1 of Cr(VI) with the addition of complexing reagent is determined better removal efficiency (96%) compared to the solutions without the addition of ligand. At the higher content of Cr(VI) in model solutions were less marked variations in removal efficiency as compared to the solutions without added 1,5-diphenylcarbazide.

• Keywords: 1; 5-difenilkarbazid; ICP-AES; krom; nanočestice željeza
• Keywords (english): chromium; 1; 5-diphenylcarbazide; ICP-AES; zero valent iron nanoparticles
• Language: croatian
• URN:NBN: urn:nbn:hr:217:134207
• Study programme: Title: Graduate university studies in chemistry; specializations in: Research programme; Course: Research programme; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra kemije (magistar/magistra kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-01-27 11:19:19