Sorption Process of Date Palm Biochar for Aqueous Cd (II) Removal: Efficiency and Mechanisms

Adel Usman, Abdulazeem Sallam, Ming Zhang, Meththika Vithanage, Mahtab Ahmad, Abdullah Al-Farraj, Yong Sik Ok, Adel Abduljabbar, Mohammad Al-Wabel

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Date palm biochar (BC) was prepared at two pyrolysis temperatures of 300��C (BC-300) and 700��C (BC-700) as sorbents for removing Cd from aqueous solutions in batch experiments. The results indicated that Cd removal efficiency was significantly affected by the initial pH (2–7) of aqueous solutions, with the lowest Cd adsorption at initial pH of 2. BC-700 was more effective in removing Cd from aqueous solution than BC-300. The maximum adsorption capacity of 43.58�mg�g−1 was observed for BC-700 based on the Langmuir model, which was 1.6 times higher than that of BC-300 (26.96�mg�g−1). Mechanistic evidences of Cd sorption onto BCs were identified by using the instrumental techniques of XRD and SEM or predicted from sorption isotherm and kinetic models. The Cd sorption onto BCs followed the pseudo-second order kinetics, suggesting chemisorption as one of the possible mechanisms of Cd interaction with BCs. However, XRD and SEM analyses of BCs before and after Cd sorption indicated that ion exchange and surface complexation could be the controlling mechanisms of Cd adsorption onto BC-300, while precipitation (as CdCO3) could be the operating mechanism of Cd sorption onto BC-700. Date palm waste, therefore, could possibly be converted to BC as an efficient sorbent for removal of Cd from aqueous media. However, the removal efficiency of BCs varies with different pyrolysis temperatures.

Original languageEnglish
Article number449
JournalWater, Air, and Soil Pollution
Volume227
Issue number12
DOIs
Publication statusPublished - 2016 Dec 1
Externally publishedYes

Fingerprint

Sorption
sorption
aqueous solution
Sorbents
adsorption
Adsorption
pyrolysis
Pyrolysis
scanning electron microscopy
X-ray diffraction
kinetics
Scanning electron microscopy
Kinetics
Chemisorption
Complexation
complexation
Isotherms
ion exchange
Ion exchange
isotherm

Keywords

  • Cadmium sorption
  • Date palm biochar
  • Kinetic models
  • Pyrolysis temperature

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Ecological Modelling
  • Water Science and Technology
  • Pollution

Cite this

Usman, A., Sallam, A., Zhang, M., Vithanage, M., Ahmad, M., Al-Farraj, A., ... Al-Wabel, M. (2016). Sorption Process of Date Palm Biochar for Aqueous Cd (II) Removal: Efficiency and Mechanisms. Water, Air, and Soil Pollution, 227(12), [449]. https://doi.org/10.1007/s11270-016-3161-z

Sorption Process of Date Palm Biochar for Aqueous Cd (II) Removal : Efficiency and Mechanisms. / Usman, Adel; Sallam, Abdulazeem; Zhang, Ming; Vithanage, Meththika; Ahmad, Mahtab; Al-Farraj, Abdullah; Ok, Yong Sik; Abduljabbar, Adel; Al-Wabel, Mohammad.

In: Water, Air, and Soil Pollution, Vol. 227, No. 12, 449, 01.12.2016.

Research output: Contribution to journalArticle

Usman, A, Sallam, A, Zhang, M, Vithanage, M, Ahmad, M, Al-Farraj, A, Ok, YS, Abduljabbar, A & Al-Wabel, M 2016, 'Sorption Process of Date Palm Biochar for Aqueous Cd (II) Removal: Efficiency and Mechanisms', Water, Air, and Soil Pollution, vol. 227, no. 12, 449. https://doi.org/10.1007/s11270-016-3161-z
Usman, Adel ; Sallam, Abdulazeem ; Zhang, Ming ; Vithanage, Meththika ; Ahmad, Mahtab ; Al-Farraj, Abdullah ; Ok, Yong Sik ; Abduljabbar, Adel ; Al-Wabel, Mohammad. / Sorption Process of Date Palm Biochar for Aqueous Cd (II) Removal : Efficiency and Mechanisms. In: Water, Air, and Soil Pollution. 2016 ; Vol. 227, No. 12.
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