This paper deals with the characterisation and study of physico-chemical stability\nof ceramic filters from clays and rice husk obtained from the far north\nregion of Cameroon (Logone Valley) and their application in potable water\ntreatment. Clays from Mouka were characterized by FTIR analysis. The results\nshowed that the filter formulated with a mixture containing 80% clay\nand 20% rice husk of 100 microm in size each gave the lowest filter shrinkage rate;\nthese formulated filters were chosen for the remaining work. Leaching tests\nshowed that with filters at a sintering temperature of 830DegreeC the leaching was\nnot observed under neutral (pH 6.8) and acidic (pH 5) conditions as compared\nto 950DegreeC and 1000DegreeC where the leaching was observed. In basic (pH 9)\ncondition, all the filters obtained released ions. Leaching tests revealed that\nthe conductivity of the leachate for the filters sintered at 830DegreeC was lower\nthan those sintered at 950DegreeC and 1000DegreeC. Meanwhile, conductivity decreases\nwith increasing sintering temperature (temperature up to 830DegreeC) due to the\nfact that ceramization starts as from 850DegreeC that leads to an amorphous state\nthat favours chemical stability, the leaching ions were Fe2+, Ca2+, Mg2+ and\nAl3+. The ceramic filters sintered at 950DegreeC were applied to the filtration of\nwater and the performance in terms of turbidity reduction was 95% and the\nflow rate after 50 minutes was 100 * 10-3 L/h.
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