The Comparative study of adsorption capacity of two mixed materials for arsenic remediation in aqueous solutions

Arsenic remediation using mixed materials

  • Yacouba SANOU Laboratory of Analytical, Environmental and Bio-Organic Chemistry, Chemistry Department, University Joseph KI-ZERBO, 03 BP 7021. Burkina Faso
  • Samuel PARE Laboratory of Analytical, Environmental and Bio-Organic Chemistry, Chemistry Department, University Joseph KI-ZERBO, 03 BP 7021. Burkina Faso
Keywords: Adsorption, arsenic, granular ferric hydroxide, laterite, mixed materials.


Arsenic pollution is one of issues for drinkable water supply in rural areas of Burkina Faso. The objective of this study was to look for a cheap technology for a better treatment of enriched arsenic water up to the admissible value (10 µg/L) in drinking water. To fulfil this objective, two mixed materials were prepared using a solid / solid mixture between laterite soil and granular ferric hydroxide for arsenic adsorption. Chemical analysis of laterite soil indicated a high amount of iron, aluminum and silicon. Batch experiments were conducted for As(V) adsorption using aqueous solutions. Results showed that the adsorption of arsenic (V) was strongly influenced by contact time, initial pH, adsorbent amount and initial As(V) concentration requiring their optimization. Indeed, the increase of the contact time between 5 and 90 min involved an increase of adsorption capacity up to 49.47µg/g while a change of initial pH caused a variation of adsorption capacity from 49 to 42.38 µg/g. An increase of initial arsenic concentration showed a proportional increase of adsorption capacity for both mixed material while this capacity decreased when the adsorbent amount increased. Using both kinetic models, As(V) adsorption followed best the pseudo-second order kinetic.


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How to Cite
SANOU, Y., & PARE, S. (2021). The Comparative study of adsorption capacity of two mixed materials for arsenic remediation in aqueous solutions. Journal of Environmental Treatment Techniques, 9(3), 559-565.
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