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Adsorption of as-produced and purified multiwalled carbon nanotubes (MWNTs) to heavy metal using Cu(II) as a model was investigated and characterized by many techniques. The results show that the oxygenous functional groups can be formed on MWNTs after MWNTs were purified. The oxygenous functional groups play an important role in Cu(II) adsorption to form chemical complex adsorption. The adsorption...
This study examined the feasibility of removing methyl violet (MV) and methylene blue (MB) from aqueous solutions using carbon nanotubes (CNTs). The effects of dye concentration, CNTs dosage, pH and contact time on adsorption of direct dyes by CNTs were also evaluated. The amount adsorbed increased with the dose of CNTs; however, the adsorption capacity dropped as the CNTs dosage increased. Cationic...
This paper reports a multi-walled carbon nanotube (MWNT) cluster-based process for removing bacteria by uniquely combining the two excellent properties of carbon nanotubes (CNTs): magnetic susceptibility and bacterial affinity. The reaction system consisted of large clusters of MWNTs for bacterial capture and an external magnet for bio-separation. The designed system was tested using four different...
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