MULTIWALLED CARBON NANOTUBES AS EFFICIENT ADSORBENT FOR THE REMOVAL OF CONGO RED

作者：Ramazani Shapour; Ghaedi Mehrorang^*; Mortazavi Kianoosh

来源：Fresenius Environmental Bulletin, 2011, 20(10): 2514-2520.

• Adsorption
• Congo red
• multiwalled carbon nanotubes (MWCNTs)
• kinetic and thermodynamics of adsorption

The present investigation assesses the applicability of multiwalled carbon nanotubes (MWCNTs) for the removal of Congo red (CR) from wastewaters. The CR removal rates of MWCNTs have been determined by investigating factors, such as pH effect, initial CR concentration, amount of MWCNT, contact time, and temperature. Langmuir, Freundlich, Tempkin and Dubinin-Radushkevich isotherm models have been used to evaluate the phenomenal adsorption process. With the help of adsorption isotherm data, different thermodynamic parameters, such as free energy; enthalpy, and entropy, have been calculated. At optimum values of all variables, the removal process followed the pseudo-first-order and pseudo-second-order kinetic equations.

• 出版日期2011