Novel microwave-assisted multiwall carbon nanotubes enhancing Cu (II) adsorption capacity in water

摘要: Abstract Microwave induced multiwall carbon nanotubes (MWCNTs) synthesized use a tubular microwave chemical vapor deposition technique, using acetylene and hydrogen as the precursor gases, ferrocene catalyst. The novel MWCNT samples tested for performances in terms of Cu (II) binding were characterized BET,HRTEM,FESEM analysis this sample adsorption they studied function pH, initial concentration, MWCNTs dosage, agitation speed, time. effect process parameters such time was optimized. data followed both Freundlich Langmuir isotherms. On basis model, qm calculated to be 99 mg/g microwave-synthesized MWCNTs. In order investigate dynamic behavior an adsorbent, kinetic modelled pseudo-second-order second-order. Different thermodynamic parameters, viz., ∆H°, ∆S° ∆G° have also been evaluated it has found that feasible, spontaneous endothermic nature. statistical reveals optimum conditions highest removal (99.9%) are at pH 5.5, dosage 0.1 g, contact 35 min speed 160 rpm. Our results prove microwave-assisted can used effective adsorbent due high capacity well short needed achieve equilibrium.