How does zeolite sand seperate the heavy metals from potable water? I want to know the mechanism.
Well,
Zeolites and zeolite-like materials do not comprise an easily definable family of crystalline solids. A simple criterion for distinguishing zeolites and zeolite-like materials from denser tectosilicates is based on the framework density (FD), the number of tetrahedral coordinated framework atoms (T-atoms) per 1000 Å3. A gap is clearly recognizable between zeolite type and dense tetrahedral framework structures. The maximum FD for a zeolite ranges from 19 to over 21 T-atoms per 1000 Å3, depending on the type of smallest ring present, whereas the minimum for denser structures ranges from 20 to 22.
Regards
la Zeolita efectivamente puede llegar a separar, depende el tipo de Zeolita, ya sea natural y/o sintetica, por ejemplo la experiencia que tengo es separar del agua por adsorcion, Fierro y manganeso, en estados de oxidacion Mn+2 y Fe+3 estos se "adsorben" es decir quedan en la superficie de la zeolita por diferencia de cargas electrostaticas.
el otro proceso es por intercambio ionico, este se lleva a cabo dentro de la zeolita en lo que se conoce como sitios activos. fin
Zeolites have cavities and channels that can adsorb metal ions from aqueous solutions easily depending on the size of the cavities and the size of the metal ion itself.
Zeolites are naturally occurring crystalline aluminosilicates. They are commonly found in sedimentary rocks. Structurally zeolites are tectosilicates. Pores and voids are characteristics of zeolite minerals. This made zeolites effective ion exchangers.
Not only heavy metals, zeolite has the ability to remove a wide range of contamints from water. I have used it to remove ammonia and it gave an excellent performance.
For mechanism, sorption is the main mechanism for heavy metals removal using zeolite.
Well, Mr. Ramadan Ejamal. I am very pleased to know about research and its performance. I am eagerly waiting to know the mechanism (how does it work) of it (if possible).
basically it just a sorption, like a filter
Basically it just a sorption like a filter to remove metals, SSP, salts and contaminant materials in water.
Hi
It is ion-exchange mechanism, a metal such Ca2+ or heavy Metals are exchanged with Na+ or K+ ions of zeolite. Read please my paper on zeolite on my profile.
Good discussions by the experts regarding removal of heavy metals by zeolite.
I think because zeolite sand has a negative charge so that heavy metals can be bound and separated with water
Zeolites is a natural absorb material have cavities that can adsorbed heavy metals from water.
Exactly so, mostly divalent heavy metals may be removed very easily.
Dear Sudip Saha :
please have a look at the paper attached. There could be information interesting for you.
Best regards
Vit
useful link:
http://www.ijirae.com/volumes/Vol2/iss2/17.FBCE10083.pdf.
todas las respuestas son correctas, si basicamente es por intercambio de iones con cargas, por ejemplo el manganeso se puede adherir o adsorber tambien en la parte externa de la zeolita, ya que se adsorbe como Mn+2
si me permiten agregar, las zeolitas tambien participan en la remocion o intercambio con particulas radiactivas que se encuentren en solucion acuosa,
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