Razvoj elektrokemijskog generatora hipoklorita za dezinfekciju vode in situ

undergraduate thesis

• Title (english): Development of the electrochemical hypochlotite generator for in situ water disinfection
• Author: Haris Defterdarović
• Mentor: Sanja Martinez (mentor)
• Committee member: Sanja Martinez (predsjednik povjerenstva)
• Committee member: Suzana Sopčić (član povjerenstva)
• Committee member: Ivana Grčić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2016-09-19, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering; Analysis, Synthesis and Management of Chemical Processes

Abstract

Voda je bitan sastojak svih živih organizama, a neophodna je i nenadomjestiva kao hrana za ljude i životinje, kao predmet i sredstvo rada u mnogim industrijama, kao proizvodno sredstvo u poljoprivredi, šumarstvu i ribarstvu i za održavanje prirodnog okoliša. Kod vode za piće vrlo je važno održavanje njezine kakvoće u organoleptičkom i bakteriološkom smislu u čemu nezaobilaznu ulogu imaju postupci dezinfekcije vode. Za dezinfekciju vode danas su u širokoj primjeni različite metode koje se temelje na kemijskim ili fizikalnim procesima. Cilj ovog završnog rada bilo je dobivanje hipokloritne kiseline postupkom elektrolize koja bi se in situ upotrebljavala za dezinfekciju vode. Kao anode korištene su titanske elektrode tipa 1A, 4A i 10A, a kao katoda korištena je grafitna elektroda. Elektroliza se provodila u dvije kombinacije elektrolita. U prvoj je otopina natrijeva klorida bila katolit, a destilirana voda anolit. U drugoj se kombinaciji otopina natrijeva klorida nalazila u oba prostora elektrokemijske ćelije. Produkti nastali elektrolizom u anodnom prostoru ispitivani su cikličkom voltametrijom. U provedenim pokusima elektrolize u kojima je u katodnom prostoru membranske elektrokemijske ćelije u početnom stanju bila otopina natrijevog klorida, a u anodnom prostoru destilirana voda, na temelju dobivenih cikličkih voltamograma zaključeno je da je primjenom bilo koje od ispitivanih elektroda 1A, 4A ili 10A, dobivena hipokloritna kiselina. U pokusima u kojima je u oba prostora membranske elektrokemijske ćelije u početnom stanju bila otopina natrijeva klorida, na temelju dobivenih cikličkih voltamograma zaključeno je da primjenom bilo koje od ispitivanih elektroda 1A, 4A ili 10A, nije dobivena hipokloritna kiselina. Usporedbom s literaturno dostupnim podacima zaključeno je da su dobivene krivulje cikličkih voltamograma karakteristične za otopinu natrijeva klorida. U daljnjim istraživanjima potrebno je ispitati utjecaj procesnih parametara na konverziju reaktanata, te djelotvornost hipokloritne kiseline kao sredstva za dezinfekciju vode in situ.

Abstract (english)

Water is essential ingredient of all living organisms. It is vital and irreplaceable as food and feed, as the subject and mean of the work in many industrial branches, agriculture, forestry and fishery and for environmental preservation. It is very important for potable water to ensure its quality especially regarding organoleptic and microbiological parameters. Water disinfection procedures plays unavoidable role. Different methods for water disinfection, based on chemical or physical techniques, are widely applied today. The objective of this bachelor graduate thesis was to obtain hypochlorous acid by the mean of electrolysis, thus enabling in situ application of it for water disinfection. Electrodes of the type 1A, 4A and 10A were used as anodes, and graphite electrode as cathode. Electrolysis was performed in two combinations of electrolyte. In the first one water solution of sodium chloride was used as catholyte, and distilled water as anolyte. In the second one sodium chloride solution was in both spaces of electrolytic cell. Products obtained by electrolysis in anodic space of the cell were investigated by the use of cyclic voltammetry. On the basis of the obtained cyclic voltammograms it was concluded that in the experiments in which in the cathodic space of the membrane electrochemical cell solution of sodium chloride was charged and in anodic space distilled water, by the application of any electrode between 1A, 4A or 10A hypochlorous acid was obtained. In the experiments in which in both anodic and cathodic spaces water solution of sodium chloride was charged, by the use of any electrode between 1A, 4A and 10A, no hypochlorous acid was obtained. It was concluded on the basis of the obtained cyclic voltammograms, as well. By the comparison with literature data it was found that curves of cyclic voltammograms are characteristic for sodium chloride solution. In further research the influence of the process parameters at reactant conversion should be studied. Efficiency of the obtained hypochlorous acid in situ as water disinfectant should be studied, as well.

• Keywords: elektroliza; hipokloritna kiselina; ciklička voltametrija
• Keywords (english): electrolysis; hypochlorous acid; cyclic voltammetry
• Language: croatian
• URN:NBN: urn:nbn:hr:149:871651
• Study programme: Title: Applied Chemistry - Undergraduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry; Course: Environmental chemistry and green technologies; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2018-02-07 12:54:16