Table 2 presents the results of the chemical composition and the ignition loss of the water treatment plant waste.
It is observed that the waste is essentially composed of Al2O3, SiO2 and Fe2O3, about 70.98%. These results agree
with the results of X-ray diffraction (Fig. 1). On the other hand, the waste sample has a high loss on ignition (at
1000 ºC) of about 24.50 wt.%. According to (Oliveira, 2004), this is due mainly to the loss of water from clay
minerals and dehydration of the hydroxides, and also the decomposition of organic material. In fact, the sample
waste has a high content of organic matter (25.85 wt.%)
Table 2 presents the results of the chemical composition and the ignition loss of the water treatment plant waste.It is observed that the waste is essentially composed of Al2O3, SiO2 and Fe2O3, about 70.98%. These results agreewith the results of X-ray diffraction (Fig. 1). On the other hand, the waste sample has a high loss on ignition (at1000 ºC) of about 24.50 wt.%. According to (Oliveira, 2004), this is due mainly to the loss of water from clayminerals and dehydration of the hydroxides, and also the decomposition of organic material. In fact, the samplewaste has a high content of organic matter (25.85 wt.%)
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