Characterization of Clay Materials from Ivory Coast for Their Use as Adsorbents for Wastewater Treatment

Abstract

In order to contribute to the valorisation of the clay materials of Ivory Coast in the depollution of wastewater, the physicochemical and mineralogical characterization of three clay samples taken in Agboville (AGB), Bingerville (BIN) and Katiola (KAT) was carried out. The objective of this work was to compare the properties of the clays in order to identify the one that is likely to have interesting adsorptive capacities to clean up contaminated water. These clays were studied by chemical analysis, X-ray diffraction, scanning electron microscopy and thermal analysis. In addition, their specific surface areas and cation exchange capacities were determined. The AGB clay is composed of 75.51% kaolinite, 14.20% illite and 9.26% quartz. The BIN clay contains 52.21% kaolinite, 6.23% illite, 17.50% quartz and 15.71% goethite. As for the KAT clay, it contains 48.08% kaolinite, 3.55% illite, 20.14% smectite, 6.11% quartz and 16.86% goethite. Their thermal behavior and microstructure are in agreement with their mineralogy. The measured specific surface areas and cation exchange capacities are consistent with literature values. The KAT clay has the highest specific surface and cation exchange capacity. In the light of the results obtained, the KAT clay appears to be more effective in depolluting water than the BIN and AGB clays.

Physic, Chemical and Mineralogical Characterizations of Clays Used in the Making of Traditional Ceramics in the City of Katiola, C ôte d’Ivoire

“…The results of chemical analysis by ICP-OES are recorded in elements) and Table 3 (minor elements). The clays studied are characterized by: • A comparable loss on ignition for samples K1, K2 and K3, but it is lower for sample K7, which confirms its siliceous nature in agreement with a previous study carried out in Tunisia [11]; • Contents of silica SiO 2 , alumina Al 2 O 3 and iron oxide Fe 2 O 3 for all samples (K1 to K7) similar to Katiola clay [12].…”

Capacity of Two Clays to Clean Up Water from an Illegal Gold Mining Site

“…The mineralogical composition of the two clays gives the KAT sample (SBET = 48.5 m 2 /g and CEC = 35.5 meq/100g) greater adsorbent properties than BIN (31.7 m 2 /g and CEC = 6. 2 meq/100g) [11]. The mineralogical and physicochemical characteristics of these two clays explain their difference with respect to the elimination of metals.…”

“…Due to their sheet structure and their interesting adsorbent properties linked to their large specific surface area and their cation exchange capacities, clays are used in the depollution of contaminated solutions as adsorbents [9,10]. In addition, several studies have shown that Côte d'Ivoire has numerous clay sites with interesting adsorbent properties [11]. Following the above, the objective of this work is to depollute water from a gold panning site using two clays from Ivory Coast.…”

Production of New Adsorbent from <i>Mango residues</i> Collected in the Urban Community of Mamou

“…This is why the recovery of this waste constitutes a real opportunity for the development of this sector. Among other things, some water purification methods such as filtration, coagulation, flocculation sedimentation have been used and reported [7] [8] [9]. To contribute to minimizing the risks associated with the poor management of waste from mangoes in the prefecture of Mamou, research work is directed towards the recovery of wet waste from mangoes into bio-gas by methanation, and the cores could be used for the production of adsorbent for the purification of polluted water and drying of mangoes in order to minimize the throwing of mango waste in the open air, in the production sites [10] [11].…”