Journal of Environmental Science and Health Part A · 2010 · 78 citations · 35 references
Natural SciencesChemical EngineeringMaterials ScienceNanomaterialsSurface ScienceWater TreatmentAdsorption At InterfacesAdsorption ProcessesAdsorptive SeparationsCarbon NanomaterialsNanotubesSurface AdsorptionAdsorbent CharacterizationAdsorption Of DyesAdsorption RemediationCarbon NanofibersCarbon-based NanomaterialsLangmuir Adsorption ModelMulti-walled Carbon NanotubesNanofibers
The removal of methylene blue (MB), a cationic dye and orange II (OII), an anionic dye, from aqueous solution by using carbon nanomaterials as multiwalled carbon nanotubes (MWNTs) and carbon nanofibers (CNF) as adsorbents was studied in batch experiments. The effect of pH, temperature and surface modification of adsorbent on the removal of MB and OII was also investigated. The removals of OII and MB by adsorption on MWNT were maximum at pH 3.0 and pH 7.0, respectively. However, in the case CNF was employed as adsorbent, the optimum values of pH were 9.0 and 5.0 for OII and MB, respectively. Langmuir and Freundlich isotherms are applied to fit the adsorption data of both dyes. Equilibrium data were well described by the typical Langmuir adsorption isotherm. Overall, the study demonstrated that MWNTs and CNFs can effectively remove cationic and anionic dyes as MB and OII from aqueous solutions under these experimental conditions.
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Carbon nanotubes and nanofibers in catalysis
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