Mullite effect on the ceramic filters effectiveness in the removal of arsenic from borehole water from Burkina Faso
Kassoum Barry,
Gisèle Laure Lecomte‐Nana,
Nassio Sory,
Moussa Ouedraogo,
Loukou Sawadogo,
Moustapha Sawadogo,
Issaka Sanou,
Mohamed Seynou,
Lamine Zerbo,
Philippe Blanchart
Affiliations
Kassoum Barry
University of Ouahigouya, 01 BP 346, Ouahigouya 01, Burkina Faso; Laboratory of Molecular Chemistry and Materials (LC2M), University Joseph KI-ZERBO, 03 BP 7021, Ouaga 03, Burkina Faso; Institute of Research for Ceramic (IRCER), European Ceramic Centre (CEC), 12 Atlantis Street, 87068, Limoges, France
Gisèle Laure Lecomte‐Nana
Institute of Research for Ceramic (IRCER), European Ceramic Centre (CEC), 12 Atlantis Street, 87068, Limoges, France; Corresponding author.
Nassio Sory
Laboratory of Molecular Chemistry and Materials (LC2M), University Joseph KI-ZERBO, 03 BP 7021, Ouaga 03, Burkina Faso; Polytechnic School of Ouaga, 18 BP 234, Ouaga 18, Burkina Faso
Moussa Ouedraogo
Laboratory of Molecular Chemistry and Materials (LC2M), University Joseph KI-ZERBO, 03 BP 7021, Ouaga 03, Burkina Faso; Virtual University of Burkina, Ouaga 2000, Burkina Faso
Loukou Sawadogo
Laboratory of Molecular Chemistry and Materials (LC2M), University Joseph KI-ZERBO, 03 BP 7021, Ouaga 03, Burkina Faso
Moustapha Sawadogo
Laboratory of Molecular Chemistry and Materials (LC2M), University Joseph KI-ZERBO, 03 BP 7021, Ouaga 03, Burkina Faso
Issaka Sanou
Laboratory of Molecular Chemistry and Materials (LC2M), University Joseph KI-ZERBO, 03 BP 7021, Ouaga 03, Burkina Faso; Laboratory of Chemistry and Renewable Energies (LaCER), University Nazi BONI, 01 BP 1091 Bobo 01, Burkina Faso
Mohamed Seynou
Laboratory of Molecular Chemistry and Materials (LC2M), University Joseph KI-ZERBO, 03 BP 7021, Ouaga 03, Burkina Faso
Lamine Zerbo
Laboratory of Molecular Chemistry and Materials (LC2M), University Joseph KI-ZERBO, 03 BP 7021, Ouaga 03, Burkina Faso
Philippe Blanchart
Institute of Research for Ceramic (IRCER), European Ceramic Centre (CEC), 12 Atlantis Street, 87068, Limoges, France
In recent years, porous ceramics have been widely studied because of their excellent technological properties. The intrinsic technological characteristics depend on the forming process and the application for which the materials are intended. A clay raw material (75 mass%) which is rich in melting oxides and waste peanut shells (25 mass%) were used to manufacture porous ceramics for the removal of arsenic from borehole water in Burkina Faso. A borehole water analysis shows a concentration of arsernic of 39 μg L−1 above the WHO standard. The porous ceramics were obtained from samples shaped by unidirectionnal pressing and after sintering at 900 °C (MKOR9) or 1100 °C (MKOR11). Unlike MKOR9 materials, MKOR11 materials consist of 27 % mullite phases. MKOR9 and MKOR11 porous materials presented a diametrical compression stress to rupture greater than 0.15 MPa, as recommended in the literature for ceramic filters. The obtained permeability value of MKOR11 ceramic materials (53,802 L/h.m2.bar) is much higher than that of MKOR9 (18596 L/h m2 bar), although its open porosity (61 %) is lower than that of MKOR9 materials (65 %). The removal rate obtained with MKOR9 is 24 % compared to 95 % for MKOR11. MKOR11 filters almost completely reduce arsenic concentration below the WHO limit values, which is not the case for MKOR9 materials. The adsorption kinetics and thermodynamic parameters showed that the adsorption process is the chemisorption. This work has shown that MKOR11 ceramic filters have a very impressive effectiveness, and they could be manufactured for the benefit of the remote population.
