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. 2022 Apr 6;8(4):e09241. doi: 10.1016/j.heliyon.2022.e09241

Table 1.

Chemical Composition of Zemero, Mehal Meda, and Seladengay clays activated with H2SO4 (25 %).

Composition Zemero (%) Mehal Meda (%) Seladengay (%)
Al2O3 12.899 17.171 21.616
Fe2O3 2.544 6.259 5.727
MgO 0.520 0.848 0.475
CaO 2.411 1.325 0.634
CaCO3 4.305 2.366 1.132
K2O 0.705 0.782 0.715
SiO2 51.621 45.977 40.376
SO3 0.214 0.198 0.144
Na2O 0.314 0.455 0.195