| الملخص | This study is considered as a complementary work to the previous study (Effect of H2SO4, HCl on Physico chemical properties of kaolin clay "Duekhla Site"). In this study,the calcination was coincided with the activation by inorganic acids (sulfuric acid H2SO4 and Hydrochloric acid HCl).
Acid activation was done at the conditions of solid/liquid 1gm/8ml, temperature of reaction was (100-110) °C, acid concentration (Molarity) 9.5M, 11.5M and 4 hrs time of treatment for H2SO4 and HCl, respectively.
Calcination was carried out at temperature ranging from (350-550) °C and time intervals ranging from (1 to 2) hrs at constant rate 5 °C/min, then the samples were chemicallyanalyzed by wet analysis and XRDanalysis (before and after calcination). The wet analysis indicatesthe decrease in the octahedral cations ofimpurities oxides that accomplished with alumina (CaO, Na2O, K2O, MgO and TiO2), while XRD indicates the collapse of the clay structure.Theoretically, the results showed that the suitable temperature for thermal treatment of kaolin activated by inorganic acids without causing the damage in the structural composition was 350 °C at 1 hrfor both acids, but it wasn’t practically be examined to know its efficiency as adsorbent agent. | |
