Influence of organobentonite structure on toluene adsorption from water solution
AUTOR(ES)
Vidal, Nuria, Volzone, Cristina
FONTE
Mat. Res.
DATA DE PUBLICAÇÃO
02/10/2012
RESUMO
Due to increase water pollution by organic compound derived from hydrocarbons such as toluene, several alternative technologies for remediation of polluted water have been originated. In this work natural bentonites were modified with cetyltrimethylammonium (CTMA+) for obtaining organophilic bentonites. The obtained CTMA-bentonites would be suitable for use as adsorbents of toluene present in water. The influence of structural characteristics of CTMA-bentonites on their adsorption capacity was studied. It was shown that adsorption of toluene depended on homogeneous interlayer space associated with arrangements of CTMA+ paraffin-monolayer and bilayer models, accompanied by a high degree ordering of the carbon chain of organic cation in both arrangements. However, packing density would not have an evident influence on the retention capacity of these materials. The solids obtained were characterized by chemical analysis, X-ray diffractions and infrared spectroscopy. Toluene adsorption was measured by UV-visible spectrophotometer. Adsorption capacity was studied by determining adsorption isotherms and adsorption coefficient calculation. The adsorption isotherms were straight-line indicating a partition phenomenon of toluene between the aqueous and organic phase present in organophilic bentonites.
Documentos Relacionados
- Adsorption of toluene from aqueous solution onto a granular actived carbon bed in a pilot plant
- Toluene adsorption on VSbO4(110): a study of an electronic structure
- Study on the adsorption of heavy metal ions from aqueous solution on modified SBA-15
- Removal of cyanobacteria toxins from drinking water by adsorption on activated carbon fibers
- The influence of plastic deformation on the structure of passive films on carbon steel in simulated pore solution