Preparation of activated and non-activated carbon from Conocarpus pruning waste as low-cost adsorbent for removal of heavy metal ions from aqueous solution

Ahmed H. El-Naggar, Abdalwahab K.R. Alzhrani, Mahtab Ahmad, Adel R.A. Usman, Dinesh Mohan, Yong Sik Ok, Mohammad I. Al-Wabel

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Conocarpus pruning waste, an agricultural byproduct, was converted into low-cost activated and non-activated carbons and used for the remediation of Cd2+, Cu2+, and Pb2+ from aqueous solutions. The carbonization was carried out at 400 °C, while the activation was carried out in the presence of KOH and ZnCl2. Batch single-solute and multi-solute equilibrium and kinetic experiments were carried out to determine the adsorption capacities of the prepared activated and non-activated carbons, and these were further compared with commercially available activated carbon. The results showed that KOH-activated carbon (CK) outperformed the other activated and non-activated carbons in terms of adsorption efficiency. CK removed >50% of the applied Cd2+ and Cu2+ and 100% of Pb2+ at the initial concentration of 40 mg L-1. Interestingly, the performance of Conocarpusderived non-activated carbon was better than that of the commercial activated carbon, as observed from the Langmuir maximum adsorption capacities of 65.61, 66.12, and 223.05 μmol g-1 for Cd2+, Cu2+, and Pb2+, respectively. The Pb2+ was the metal most easily removed from aqueous solution because of its large ionic radius. The kinetic dynamics were well described by the pseudo-second order and Elovich models.

Original languageEnglish
Pages (from-to)1092-1107
Number of pages16
JournalBioResources
Volume11
Issue number1
DOIs
Publication statusPublished - 2016 Jan 1
Externally publishedYes

Fingerprint

pruning
Heavy Metals
Heavy ions
Adsorbents
Heavy metals
Metal ions
Carbon
aqueous solution
heavy metal
Activated carbon
activated carbon
ion
carbon
adsorption
Adsorption
cost
Costs
solute
kinetics
Agricultural wastes

Keywords

  • Adsorption
  • Carbonization
  • Chemical activation
  • Competitive effect
  • Kinetic dynamics

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Waste Management and Disposal

Cite this

Preparation of activated and non-activated carbon from Conocarpus pruning waste as low-cost adsorbent for removal of heavy metal ions from aqueous solution. / El-Naggar, Ahmed H.; Alzhrani, Abdalwahab K.R.; Ahmad, Mahtab; Usman, Adel R.A.; Mohan, Dinesh; Ok, Yong Sik; Al-Wabel, Mohammad I.

In: BioResources, Vol. 11, No. 1, 01.01.2016, p. 1092-1107.

Research output: Contribution to journalArticle

El-Naggar, Ahmed H. ; Alzhrani, Abdalwahab K.R. ; Ahmad, Mahtab ; Usman, Adel R.A. ; Mohan, Dinesh ; Ok, Yong Sik ; Al-Wabel, Mohammad I. / Preparation of activated and non-activated carbon from Conocarpus pruning waste as low-cost adsorbent for removal of heavy metal ions from aqueous solution. In: BioResources. 2016 ; Vol. 11, No. 1. pp. 1092-1107.
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