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Article
Comparative kinetic study of functionalized carbon nanotubes and magnetic biochar for removal of Cd2+ ions from wastewater
Korean Journal of Chemical Engineering (2015)
Abstract

We did a comparative study between functionalized multiwall carbon nanotube (FMWCNTs), and magnetic biochar was carried out to determine the most efficient adsorbent to be employed in the Cd2+ ion removal. We optimized parameters such as agitation speed, contact time, pH and adsorbent dosage using design expert vrsion 6.08. The statistical analysis reveals that optimized condition for highest removal of Cd2+ are at pH 5.0, with dosage 1.0 g, agitation speed and contact time of 100 rpm and 90 minutes, respectively. For the initial concentration of 10mg/l, the removal efficiency of Cd2+ using FMWCNTs was 90% and and 82% of magnetic biochar. The maximum Cd2+ adsorption capacities of both FMWCNTs and magnetic biochar were calculated: 83.33mg/g and 62.5mg/g. The Langmuir and Freundlich constants for FMWCNTs were 0.056 L/mg and 13.613 L/mg, while 0.098 L/mg and 25.204 L/mg for magnetic biochar. The statistical analysis proved that FMWCNTs have better adsorption capacity compared to magnetic biochar and both models obeyed the pseudo-second-order. Link to Full-Text Articles : http://link.springer.com/article/10.1007/s11814-014-0260-7

Keywords
  • mwcnt,
  • cadmium,
  • heavy metal,
  • adsorption,
  • functionalization,
  • magnetic biochar,
  • aqueous-solution,
  • adsorption sites,
  • technology,
  • desorption,
  • cadmium,
  • pb(ii),
  • pb2+
Publication Date
March, 2015
Publisher Statement
Cd5ev Times Cited:0 Cited References Count:53
Citation Information
"Comparative kinetic study of functionalized carbon nanotubes and magnetic biochar for removal of Cd2+ ions from wastewater" Korean Journal of Chemical Engineering Vol. 32 Iss. 3 (2015)
Available at: http://works.bepress.com/facultyofengineering_universityofmalaya/194/