Određivanje trajanja elektrokoagulacijskog procesa za uklanjanje teških metala iz voda

master's thesis

• Title (english): Required duration of the electrocoagulation process for the removal of heavy metals from water
• Author: Josipa Zlomislić
• Mentor: Ivan Halkijević (mentor)
• Committee member: Dražen Vouk (predsjednik povjerenstva)
• Committee member: Ivan Halkijević (član povjerenstva)
• Committee member: Domagoj Nakić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Civil Engineering; (Water Research); Zagreb
• Defense date and country: 2023-02-16, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Civil Engineering; Hydrotechnology

Abstract

U ovom radu provedeno je eksperimentalno istraživanje učinkovitosti uklanjanja teških metala primjenom procesa elektrokoagulacije na uzorku otopine koja je sadržavala teške metale: kadmij, krom, koblt, mangan i nikal. Korištene su elektrode željeza, aluminija, bakra i grafita, te su ispitivanja provedena koristeći tri različite početne koncentracije otopine (0,1, 1 i 10 ppm). Ispitivanja su trajala po 2 minute za svaku pojedinu elektrodu i različite početne koncentracije, a uzorci su uzimani svakih 15 sekundi u svrhu ispitivanja trajanja elektrokoagulacijskog procesa. Kako bi se opisao postupak uklanjanja teških metala obrađena je kinetika u optimalnim uvjetima u svrhu dobivanja najveće učinkovitosti. Nadalje, obrađen je utjecaj početne koncentracije onečišćenja i utjecaj materijala na učinkovitost uklanjanja. Rezultatima je dobiveno da se pri nižim početnim koncentracijma postiže bolja učinkovitost. U slučaju odabira materijala, vsoka učinkovitost uklanjanja postiže se korištenjem elektroda željeza, aluminija i bakra, dok su se grafitne elektrode pokazale općenito neučinkovite. Vrijeme trajanja procesa od 2 minute pokazalo se nedovoljnim za potpuno uklanjanje, međutim rezultati su i dalje bili zadovoljavajući s obzirom na visok postotak uklanjanja pojedinih materijala.

Abstract (english)

In this paper, an experimental study of heavy metal removal efficiency was conducted using an electrocoagulation process on a sample of solution containing heavy metals: cadmium, chromium, cobalt, manganese and nickel. Iron, aluminium, copper and graphite electrodes were used, and the tests were carried out at three different initial concentrations of the solution (0,1, 1 and 10 ppm). The tests lasted 2 minutes for each individual electrode and different initial concentrations, and samples were taken every 15 seconds for the purpose of testing the duration of the electrocoagulation process. In order to describe the process of removing heavy metals, the kinetics study was carried out under optimal conditions in order to obtain the highest efficiency. Furthermore, the influence of the initial concentration of the pollution and the influence of the material on the removal efficiency were discussed. Results showed better efficiency at lower initial concentrations. In terms of material selection, high removal efficiency is achieved by using iron, aluminium and copper electrodes, while graphite electrodes have proven to be generally inefficient. The duration of the 2 minute process proved to be insufficient for complete removal, however the results were still satisfactory considering the high percentage of removal of certain materials.

• Keywords: obrada vode; elektrokoagulacija; početna koncentracija; teški metali; kinetika
• Keywords (english): water treatment; electrocoagulation; initial concentration; heavy metals; kinetics
• Language: croatian
• URN:NBN: urn:nbn:hr:237:034056
• Study programme: Title: Civil Engineering; specializations in: Construction Management, Transportation Engineering, Geotechnical Engineering, Hydraulic Engineering, Structural Engineering, Construction Materials, Theory and Modeling of Structures; Course: Construction Management; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka građevinarstva (magistar/magistra inženjer/inženjerka građevinarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-03-16 10:01:20