Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Removal of As(III) Using a Natural Laterite Fixed-Bed Column Intercalated with Activated Carbon: Solving the Clogging Problem to Achieve Better Performance

Régie Dimanche OUEDRAOGO
,
Corneille BAKOUAN
ORCID logo ,
Abdoul Karim Sakira
,
Brahima SORGHO
,
Boubié GUEL
* ORCID logo ,
Issa Touridomon SOMÉ
,
Anne-Lise HANTSON
,
Eric ZIEMONS
ORCID logo ,
Dominique MERTENS
,
Philippe HUBERT
,
Jean-Michel Kauffmann
Version 1 : Received: 13 September 2023 / Approved: 14 September 2023 / Online: 14 September 2023 (11:57:07 CEST)

How to cite: OUEDRAOGO, R.D.; BAKOUAN, C.; Sakira, A.K.; SORGHO, B.; GUEL, B.; SOMÉ, I.T.; HANTSON, A.; ZIEMONS, E.; MERTENS, D.; HUBERT, P.; Kauffmann, J. Removal of As(III) Using a Natural Laterite Fixed-Bed Column Intercalated with Activated Carbon: Solving the Clogging Problem to Achieve Better Performance. Preprints 2023, 2023090972. https://doi.org/10.20944/preprints202309.0972.v1 OUEDRAOGO, R.D.; BAKOUAN, C.; Sakira, A.K.; SORGHO, B.; GUEL, B.; SOMÉ, I.T.; HANTSON, A.; ZIEMONS, E.; MERTENS, D.; HUBERT, P.; Kauffmann, J. Removal of As(III) Using a Natural Laterite Fixed-Bed Column Intercalated with Activated Carbon: Solving the Clogging Problem to Achieve Better Performance. Preprints 2023, 2023090972. https://doi.org/10.20944/preprints202309.0972.v1

Abstract

Natural laterite fixed-bed column intercalated with activated carbon prepared from Balanites ae-gyptiaca (BA-AC) was used for As(III) removal from an aqueous solution. Investigations were carried out to solve the problem of column clogging which appears during water percolation through the column. Experimental tests were conducted to evaluate the hydraulic conductivity and the effects of various parameters such as grain size, bed height, and initial As(III) concentra-tion. The breakthrough increased from 15 to 85 h with the increase of the bed height from 20 to 40 cm, and decreased from 247 to 32 h with the increase of initial As(III) concentration from 0.5 to 2 mg/L. The permeability data showed that the fixed-bed column filled with laterites layers intercalated with activated carbon performs much better than the non-intercalated adsorbent col-umn. The Bohart-Adams model showed that increasing the bed height induced a decrease in kAB and N0 values. The critical bed depths determined using the bed depth service time (BDST) mod-el for As(III) removal were 15.23 and 7.98 cm for 1 and 20% breakthrough, respectively. The re-sults showed that the new low-cost filtration system, based on laterite layers alternated with BA-AC layers, could be used for the treatment of arsenic-contaminated water.

Keywords

laterite; balanites aegyptiaca; percolation; activated carbon; hydraulic conductivity

Subject

Chemistry and Materials Science, Materials Science and Technology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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