Spektrometrijska analiza uklanjanja kadmija iz vodenih otopina pomoću neutralnih nanočestica željeza

master's thesis

• Title (english): Spectrometric analysis of removal of cadmium from aqueous solutions using zero-valent iron nanoparticles
• Author: Viktor Zagorec
• Mentor: Sanda Rončević (mentor)
• Committee member: Sanda Rončević (predsjednik povjerenstva)
• Committee member: Davor Kovačević (član povjerenstva)
• Committee member: Biserka Prugovečki (član povjerenstva)
• Committee member: Iva Juranović Cindrić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2018-07-12, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

U radu je ispitano uklanjanje kadmija iz vodenih otopina pomoću različitih vrsta sintetiziranih neutralnih nanočestica željeza. Ispitivane vrste obuhvaćaju nanočestice pripravljene iz omjera željeza i dipikolinske kiseline Fe:PDCA = 1:1, odnosno 2:1 uz dva načina prethodne funkcionalizacije. Uklanjanje kadmija iz modelnih vodenih otopina nakon sorpcije na funkcionaliziranim česticama praćeno je pomoću atomske emisijske spektrometrije uz induktivno spregnutu plazmu (ICP-AES). Rezultati su pokazali ovisnost sorpcije kadmija o vrsti funkcionalizacije. Za koncentracijsko područje kadmija < 5 μg mL-1 utvrđeno je gotovo potpuno uklanjanje iz vodenih otopina za sve ispitivane sustave. Razlike u sorpciji pri višim koncentracijama razmatrane su pomoću određivanja zeta potencijala te veličine i distribucije veličina čestica u otopinama. Utvrđene su promjene veličina i zeta potencijala u ispitivanom koncentracijskom području kadmija uz dodatak funkcionaliziranih neutralnih nanočestica željeza. Pri tome je optimalno uklanjanje kadmija pokazao sustav Fe:PDCA = 1:1 pripravljen uz naknadnu inkubaciju na nanočesticama.

Abstract (english)

The paper analyzes the removal of cadmium from aqueous solutions using different types of synthesized neutral iron nanoparticles. The investigated species include nanoparticles prepared from iron and dipicolinic acid ratios Fe:PDCA = 1: 1 and 2: 1 for two modes of prior functionalization. The removal of cadmium from model aqueous solutions after sorption on functionalized particles is monitored by atomic emission spectrometry with inductively plated plasma (ICP-AES). The results showed the dependence of cadmium sorption on the type of functionalization. For the concentration range of cadmium <5 μg mL-1 almost completely eliminated from aqueous solutions with all tested systems. The differences in sorption at higher concentrations were considered by determining the zeta potential and the size and distribution of the particles in the solutions. Changes in size and zeta potentials were found in the investigated concentration range of cadmium with the addition of functional neutral iron nanoparticles. In this case, the optimal cadmium removal demonstrated the Fe:PDCA = 1: 1 system prepared for subsequent incubation on nanowires.

• Keywords: ICP-AES; kadmij; neutralne nanočestice željeza; zeta potencijal
• Keywords (english): cadmium; ICP-OES; zero-valent iron nanoparticles; zeta potential
• Language: croatian
• URN:NBN: urn:nbn:hr:217:231336
• 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; Embargo expiration date: 2020-07-12
• Created on: 2018-09-04 10:04:06