| Title |
Adsorption kinetic parameters of Fe3+ and Ni2+ ions by gyrolite / |
| Another Title |
Fe3+ ir Ni2+ jonų adsorbcijos girolitu kinetiniai parametrai. |
| Authors |
Zadavičiūtė, Skirmantė ; Baltakys, Kęstutis ; Eisinas, Anatolijus |
| DOI |
10.5755/j01.ms.21.1.5735 |
| Full Text |
|
| Is Part of |
Materials science = Medžiagotyra.. Kaunas : KTU. 2015, vol. 21, no. 1, p. 117-122.. ISSN 1392-1320. eISSN 2029-7289 |
| Keywords [eng] |
gyrolite ; inorganic adsorbents ; heavy metal ions adsorption ; kinetics parameters |
| Abstract [eng] |
In this work the adsorption kinetic parameters for Fe3+ and Ni2+ ions by gyrolite are presented. Additionally, the adsorption mechanism was described by using pseudo first order and pseudo second order equations. It was determined that the adsorption capacity of gyrolite and intrusion of heavy metals ions in its structure depends on reaction time and the pH value of adsorptive. It was observed that the incorporation of Fe3+ ions occurs more intensive than Ni2+ ions. It was found that in the acidic solution the intrusion of Fe3+ ions into gyrolite structure proceeds by two types of chemical reaction mechanisms: substitution and addition. Meanwhile, nickel ions were participated only in substitution reaction: gyrolite-Ca0 + Mex+ ↔ gyrolite-Me0 + Ca2+. It was observed that the pseudo second order model fit well for iron and nickel ions adsorption mechanism. It was estimated that the adsorption reactions are not reversible process and the crystal structure of gyrolite is stable. Moreover, synthetic adsorbent and the products of sorption were characterized by XRD, STA and FT-IR methods. |
| Published |
Kaunas : KTU |
| Type |
Journal article |
| Language |
English |
| Publication date |
2015 |
| CC license |
|
