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Natural zeolites in water treatment – how effective is their use


Margeta, Karmen; Zabukovec Logar, Nataša; Šiljeg, Mario; Farkaš, Anamarija
Natural zeolites in water treatment – how effective is their use // Water treatment / Elshorbagy, Walid ; Chowdhury, Rezaul Kabir (ur.).
Rijeka: InTech, 2013. str. 81-112


Naslov
Natural zeolites in water treatment – how effective is their use

Autori
Margeta, Karmen ; Zabukovec Logar, Nataša ; Šiljeg, Mario ; Farkaš, Anamarija

Vrsta, podvrsta i kategorija rada
Poglavlja u knjigama, znanstveni

Knjiga
Water treatment

Urednik/ci
Elshorbagy, Walid ; Chowdhury, Rezaul Kabir

Izdavač
InTech

Grad
Rijeka

Godina
2013

Raspon stranica
81-112

ISBN
978-953-51-0928-0

Ključne riječi
Natural zeolite, modified natural zeolite, characterization of natural zeolite, water treatment procedure

Sažetak
The unique treedimensional porous structure gives natural zeolites various application possibilities. Because of the excess of the negative charge on the surface of zeolite, which results from isomorphic replacement of silicon by aluminum in the primary structural units, natural zeolites belong to the group of cationic exchangers. Natural zeolites have advantages over other cation exchange materials such as commonly used organic resins, because they are cheap, they exhibit excellent selectivity for different cations at low temperatures, which is accompanied with a release of non-toxic exchangeable cations (K+, Na+, Ca2+ and Mg2+) to the environment, they are compact in size and they allow simple and cheap maintenance in the full-scale applications. The efficiency of water treatment by using natural and modified zeolites depends on the type and quantity of the used zeolite, the size distribution of zeolite particles, the initial concentration of contaminants (cation/anion), pH value of solution, ionic strength of solution, temperature, pressure, contact time of system zeolite/solution and the presence of other organic compounds and anions. For water treatment with natural zeolites, standard procedures are used, usually a procedure in column or batch process. More careful consideration of their superb metal removal properties and awareness of possible regeneration or further use of contaminant/metal-loaded forms can considerably increase their environmental application possibilities, with a focus the reduction of high concentrations of cations and anions in drinking water and wastewater, for surface, underground and public municipal water treatment independently or in combination with others physical - chemical methods.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo

Napomena
DOI: 10.5772/2883



POVEZANOST RADA


Projekt / tema
017-0171682-0891 - Upravljanje prirodnim i ljudskim resursima –regionalni razvoj i očuvanje okoliša (Sanja Tišma, )

Ustanove
Institut za razvoj i međunarodne odnose