Removal of cationic dyes from aqueous solution using magnetic multi-wall carbon nanotube nanocomposite as adsorbent.
A magnetic multi-wall carbon nanotube (MMWCNT) nanocomposite was synthesized and was used as an adsorbent for removal of cationic dyes from aqueous solutions. The MMWCNT nanocomposite was composed of commercial multi-wall carbon nanotubes and iron oxide nanoparticles. The properties of this magnetic adsorbent were characterized by scanning electron microscopy, X-ray diffraction and BET surface area measurements. Adsorption characteristics of the MMWCNT nanocomposite adsorbent were examined using methylene blue, neutral red and brilliant cresyl blue as adsorbates. Experiments were carried out to investigate adsorption kinetics, adsorption capacity of the adsorbent and the effect of adsorption dosage and solution pH values on the removal of cationic dyes. Kinetic data were well fitted by a pseudo second-order model. Freundlich model was used to study the adsorption isotherms. The prepared MMWCNT adsorbent displayed the main advantage of separation convenience compared to the present adsorption treatment.
Gong
Ji-Lai
JL
College of Environmental Science and Engineering, Hunan University, Changsha, China. jilaigong@hnu.cn
Wang
Bin
B
Zeng
Guang-Ming
GM
Yang
Chun-Ping
CP
Niu
Cheng-Gang
CG
Niu
Qiu-Ya
QY
Zhou
Wen-Jin
WJ
Liang
Yi
Y
D000327:Adsorption; D002412:Cations; D004396:Coloring Agents / Q000302:isolation & purification*; D005290:Ferric Compounds; D007220:Industrial Waste / Q000517:prevention & control; D007700:Kinetics; D008280:Magnetics; D053761:Nanocomposites / Q000737:chemistry; D037742:Nanotubes, Carbon / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D002412:Cations; D004396:Coloring Agents; D005290:Ferric Compounds; D007220:Industrial Waste; D037742:Nanotubes, Carbon; D014874:Water Pollutants, Chemical; C000499:ferric oxide