Skip to main content
Log in

Spectroscopic and Mineralogical Characterization of Bentonite Clay (Ghardaïa, Algeria) for Heavy Metals Removal in Aqueous Solutions

  • Research paper
  • Published:
International Journal of Environmental Research Aims and scope Submit manuscript

Abstract

A natural clay material, from El Menia (Ghardaia, Algeria), was used as a potential raw material for wastewater treatment. A clay sample was used in its raw and activated form. Physico-chemical properties of both samples were assessed by chemical analyses, grain size distribution, X-ray diffraction, N2 adsorption–desorption, scanning electron microscopy, thermogravimetry, X-ray fluorescence and Fourier transform infrared spectroscopy techniques. To our knowledge, this is the first study that investigates the removal heavy metal ions such as Pb2+, Zn2+, Cu2+ and Ni2+ ions from aqueous solution using adsorption method onto natural clay from El-Menia (Ghardaïa) under different conditions. Physico-chemical parameters such as the effects of adsorbent dose, pH, contact time and initial concentration were studied in a series of batch adsorption experiments at 25 °C. The obtained results revealed very high removal percentages 98%, 81%, 93% and 84% for Pb2+, Zn2+, Cu2+ and Ni2+ ions, respectively. Adsorption kinetics fitted well the pseudo-second-order model. Langmuir, Freundlich and Temkin adsorption isotherms were used to evaluate their potential fit to the experimental data. Thermodynamic parameters (ΔH°, ΔS°, and ΔG°) indicated spontaneous and exothermic adsorption processes.

Highlights

  • Algerian natural clays have high adsorptive capacities for heavy metals.

  • Characterization of the studied clays showed good mineralogical and chemical properties.

  • Removal kinetics was governed by the pseudo-second-order model.

  • Adsorption process was exothermal and spontaneous in nature.

  • Preliminary results on real wastewater treatment showed high removal efficiency.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
Fig. 13

Similar content being viewed by others

References

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Makhlouf Boufatit.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Athman, S., Sdiri, A. & Boufatit, M. Spectroscopic and Mineralogical Characterization of Bentonite Clay (Ghardaïa, Algeria) for Heavy Metals Removal in Aqueous Solutions. Int J Environ Res 14, 1–14 (2020). https://doi.org/10.1007/s41742-019-00232-6

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s41742-019-00232-6

Keywords

Navigation