Table 1 Chemical composition of the used clays (Yahaya et al. 2017; Hassan and Abdel-Khalek 1998; Boulos et al. 2015)
From: Adsorption performance of coated bentonite via graphene oxide
Clay | Total SiO2% | Free quartz (%) | Combined SiO2% | Al2O3% | H2O% | MnO% | MgO% | Other minerals (%) |
|---|---|---|---|---|---|---|---|---|
Kaolinite | 29.1 | 8 | 21.1 | 36 | 4 | – | – | 1.2 |
Bentonite | 54 | – | – | 17.01 | 14 | 0.08 | 2.47 | 12.44 |
Feldspar | 73.5 | – | – | 12.5 | – | – | – | 14 |