Vrste ionskih izmjenjivača za primjenu u tehnologiji vode

undergraduate thesis

• Title (english): Types of ion exchangers for use in water technology
• Author: Katarina Zorić
• Mentor: Marin Matošić (mentor)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Food Engineering); (Laboratory for Water Technology); Zagreb
• Defense date and country: 2014-07-10, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Biotechnology

Abstract

Danas se koriste ionski izmjenjivači na bazi sintetskih smola koji se sintetiziraju polimerizacijom stirena ili akrilne kiseline uz dodatak divinil-benzena, a s obzirom na strukturu kostura mogu biti gel ili makroporozni. Prema aktivnim ionskim grupama mogu biti jako i slabo kiseli ili bazni. Danas se sve više proizvode izmjenjivači ujednačene veličine zrna, tzv. monodisperzni izmjenjivači. Ionska izmjena se u tehnologiji vode koristi za: mekšanje, demineralizaciju, dekarbonizaciju, uklanjanje organskih tvari i nitrata. Za obnovu istrošenog ionskog izmjenjivača se većinom koristi protustrujna regeneracija u raznovrsnim konstrukcijama kolona od kojih su najčešće kolone s nasutim slojem (UPCORE i Amberpack) i višeslojne kolone. Najveći proizvođači ionskih izmjenjivača su: Dowex, Rohm & Haas, Lanxess Lewatit i Purolite čiji je kratak pregled dan na kraju rada. Što se tiče kolona, samo tvrtka Dowex proizvodi UPCORE, a tvrtka Rohm & Haas Amberpack kolone, dok su višeslojne kolone prisutne kod svih proizvođača osim kod tvrtke Lanxess Lewatit.

Abstract (english)

Ion exchangers used today are based on synthetic resins that are synthesized by polymerization of styrene or acrylic acid with the addition of divinyl-benzene. Regarding their structure they can be gel or macroporous. According to the active ionic groups they can be strong or weak, acidic or basic. Today, more and more exchangers are made in uniform particle size, and they are known as monodisperse exchangers. Ion exchange is used in water technology for: softening, demineralisation, decarbonisation as well as removal of organic matter and nitrate. For the renewal of the spent ion exchanger, counter-current regeneration is mostly used in a variety of constructions columns, of which packed bed (UPCORE and Amberpaack) and stratified bed (layered bed) are most commonly used. The largest producers of ion exchangers are: Dowex, Rohm & Haas, Lanxess Lewatit and Purolite, whose short owerview is given at the end of the paper. As for the column only Dowex produces UPCORE, and Rohm & Haas produce Amberpack columns, while stratified beds are produced by all producers, with exception of Lanxess Lewatit.

• Keywords: ionski izmjenjivači; obrada vode; gel struktura; makroporozni; kapacitet
• Keywords (english): ion exchangers; water treatment; gel structure; macroporous; capacity
• Language: croatian
• URN:NBN: urn:nbn:hr:159:333547
• Study programme: Title: Biotechnology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-04-26 11:19:53