A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Removal of Congo Red from Aqueous Solution by Sorption on Organified Rectorite
Batch sorption technique was carried out for the removal of anionic dye Congo red (CR) from aqueous solution using raw rectorite (R‐REC) and organified rectorite (CTA+‐REC) modified by cetyltrimethylammonium bromide (CTAB) as adsorbents. The effects of organification degree of CTA+‐REC as well as the process parameters including the pH of dye solution, sorption time, and initial dye concentration on adsorption capacity for CR were investigated and the sorption kinetics was also evaluated. The results showed that the sorption behaviors of R‐REC and CTA+‐REC for CR followed pseudo‐second‐order kinetic model and the sorption equilibrium data perfectly obeyed the Langmuir isotherm. The thermodynamic parameters including entropy of sorption (ΔS0), enthalpy of sorption (ΔH0), and Gibbs free energy of sorption (ΔG0) were obtained and analyzed. Fourier transform infrared study revealed that a chemisorption process occurred between CR and CTA+‐REC. REC modified by cationic surfactants showed the higher adsorption capacities for CR compared to R‐REC and in theory would be used as an efficient and promising adsorbent for the removal of anionic dyes in wastewater treatment.
Removal of Congo Red from Aqueous Solution by Sorption on Organified Rectorite
Batch sorption technique was carried out for the removal of anionic dye Congo red (CR) from aqueous solution using raw rectorite (R‐REC) and organified rectorite (CTA+‐REC) modified by cetyltrimethylammonium bromide (CTAB) as adsorbents. The effects of organification degree of CTA+‐REC as well as the process parameters including the pH of dye solution, sorption time, and initial dye concentration on adsorption capacity for CR were investigated and the sorption kinetics was also evaluated. The results showed that the sorption behaviors of R‐REC and CTA+‐REC for CR followed pseudo‐second‐order kinetic model and the sorption equilibrium data perfectly obeyed the Langmuir isotherm. The thermodynamic parameters including entropy of sorption (ΔS0), enthalpy of sorption (ΔH0), and Gibbs free energy of sorption (ΔG0) were obtained and analyzed. Fourier transform infrared study revealed that a chemisorption process occurred between CR and CTA+‐REC. REC modified by cationic surfactants showed the higher adsorption capacities for CR compared to R‐REC and in theory would be used as an efficient and promising adsorbent for the removal of anionic dyes in wastewater treatment.
Removal of Congo Red from Aqueous Solution by Sorption on Organified Rectorite
Liu, Yi (author) / Wang, Wenbo (author) / Wang, Aiqin (author)
CLEAN – Soil, Air, Water ; 38 ; 670-677
2010-07-01
8 pages
Article (Journal)
Electronic Resource
English
Sorption isotherm , Rectorite , Kinetics , Congo red , Dyes
Removal of Congo Red from Aqueous Solution by Sorption on Organified Rectorite
| Online Contents | 2010
Adsorption of Ni(II) Ions in Aqueous Solution by Na-Rectorite
| British Library Online Contents | 2009
Adsorption Performance of Aluminum-Crosslinked Modified Rectorite for Cr(VI) in Aqueous Solution
| British Library Online Contents | 2011
Adsorptive removal of congo red dye from aqueous solution using bael shell carbon
| British Library Online Contents | 2010