ADSORPTION OF ANALCIME AND ZSM-5 ON METALS
Wang, Yuxian (2012)
Wang, Yuxian
Keski-Pohjanmaan ammattikorkeakoulu
2012
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-201205218997
https://urn.fi/URN:NBN:fi:amk-201205218997
Tiivistelmä
Natural zeolite with the basic cell structure of AlO4 and SiO4 tetrahedron has the ability of sewage purification. The way to adsorb in sewage is similar to activated carbon, and the zeolite has a good capacity of adsorption on cations.
After modification, the activated zeolite acquires a better capacity of adsorption, cation-exchange and ion-exchange. After surfactant modification, zeolite can absorb the anions and organic compounds. In this way, zeolite can adsorb many kinds of ions in sewage.
The aims of the thesis were: study the properties of natural zeolites; the adsorption capacity of analcime and ZSM-5 on metals and the theory of modification. In the experiment, the aim was to check out the adsorption capacity of Cu2+ and Ni2+ by using analcime and ZSM-5 and make a compare of the adsorption capacity between the cations in the same zeolite and between the zeolites in the same cations to find out which zeolite is better and in the same zeolite which cation was better adsorbed.
The results of the experiment were that the Cu2+ cation was adsorbed better than Ni2+ in both analcime and ZSM-5. The adsorption speed of Cu2+ was faster than Ni2+. ZSM-5 had a better adsorption capacity on both Cu2+ and Ni2+ than analcime, and the speed of absorbing was faster as well. In fact, during the experiment, there was an ion-exchange reaction, even though it took a small role of the experiment. The analcime and ZSM-5 contain alkali metal-sodium cation, so the ion-exchange process happen between Na+ cation, Cu2+ and Ni2+ cations during the experiment.
After modification, the activated zeolite acquires a better capacity of adsorption, cation-exchange and ion-exchange. After surfactant modification, zeolite can absorb the anions and organic compounds. In this way, zeolite can adsorb many kinds of ions in sewage.
The aims of the thesis were: study the properties of natural zeolites; the adsorption capacity of analcime and ZSM-5 on metals and the theory of modification. In the experiment, the aim was to check out the adsorption capacity of Cu2+ and Ni2+ by using analcime and ZSM-5 and make a compare of the adsorption capacity between the cations in the same zeolite and between the zeolites in the same cations to find out which zeolite is better and in the same zeolite which cation was better adsorbed.
The results of the experiment were that the Cu2+ cation was adsorbed better than Ni2+ in both analcime and ZSM-5. The adsorption speed of Cu2+ was faster than Ni2+. ZSM-5 had a better adsorption capacity on both Cu2+ and Ni2+ than analcime, and the speed of absorbing was faster as well. In fact, during the experiment, there was an ion-exchange reaction, even though it took a small role of the experiment. The analcime and ZSM-5 contain alkali metal-sodium cation, so the ion-exchange process happen between Na+ cation, Cu2+ and Ni2+ cations during the experiment.