Adsorption mechanisms of phenol and methylphenols on organoclays
Küçük Resim Yok
Tarih
1999
Yazarlar
Ceyhan, O
Guler, H
Guler, R
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
MULTI SCIENCE PUBL CO LTD
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Eight clay-organic complexes were synthesized by placing quaternary ammonium cations (QUATs) on to bentonite (B) and kaolinite (K) by cation exchange. The organic cations used were hexadecyltrimethylammonium (HDTMA), dodecyltrimethylammonium (DDTMA), trimethylphenylammonium (TMPA) and tetramethylammonium (TMA). These organoclays were characterized via their organic carbon contents with the id of XRD and FT-IR spectroscopic analyses. The organoclays were examined for their ability to adsorb phenol (P) and several of its methyl congeners [2,4-dimethylphenol (2,4-DMP) and 2,4.6-trimethylphenol (2,4,6-TMP)]. It was shown that inorganoclays (Na-clays) and organokaolinites were incapable of adsorbing any of these organic pollutants. It was also determined that the adsorption of phenol compounds from water decreased in the order: 2,4,6-TMP > 2,4-DMP > P for HDTMA-B and DDTMA-B, 2,4-DMP > P > 2,4,6-TMP for TMPA-B and P > 2,4-DMP > 2,4,6-TMP for TMA-B. With n-hexane as a solvent a different adsorption trend was found, which depended on the type and degree of solvent interaction with the organic compounds and the organoclays. It was observed that the degree of adsorption of phenols on to organoclays was dependent on the relative adsorbent-adsorbate energies and adsorbate-solvent interactions. The adsorption isotherms of phenols an to organophilic clays were evaluated according to the Giles classification.
Açıklama
Anahtar Kelimeler
Kaynak
ADSORPTION SCIENCE & TECHNOLOGY
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
17
Sayı
6
