Table 1.
Chemical composition and cation exchange capacity of various natural zeolites around the world.
| Zeolite type, country | Major oxides content (%) |
References | ||||||
|---|---|---|---|---|---|---|---|---|
| SiO2 | Al2O3 | Fe2O3 | CaO | MgO | Na2O | K2O | ||
| CLI, Romania | 65.80 | 12.30 | 2.07 | 3.77 | 0.63 | 1.35 | 1.44 | [53] |
| CLI, Ecuador | 48.74 | 12.09 | 7.64 | 8.12 | 2.74 | 2.43 | 0.83 | [54] |
| CLI, Croatia | 64.93 | 13.39 | 2.07 | 2.00 | 1.08 | 2.40 | 1.30 | [55] |
| CLI, Serbia | 65.63 | 12.97 | 1.48 | 3.21 | 1.41 | 1.20 | 1.33 | [56] |
| CLI, Serbia | 66.57 | 13.13 | 2.30 | 3.85 | 0.56 | 1.27 | 1.17 | [57] |
| CLI, Ukraine | 68.64 | 11.50 | 1.57 | 2.38 | 0.89 | 0.29 | 3.12 | [58] |
| CLI, Ukraine | 70.39 | 12.68 | 8.05 | 0.31 | 0.27 | 2.28 | 1.36 | [59] |
| CLI, Italy | 65.26 | 12.11 | 0.50 | 0.35 | 0.51 | 5.85 | 0.43 | [60] |
| CLI, Australia | 68.26 | 12.99 | 1.37 | 2.09 | 0.83 | 0.64 | 4.11 | [61] |
| CLI, China | 65.72 | 13.50 | 1.30 | 3.10 | 0.63 | 1.16 | 3.14 | [62] |
| CLI, Turkey | 64.28 | 12.07 | 0.84 | 2.47 | 2.07 | 5.62 | 0.83 | [63] |
| CLI, Spain | 68.15 | 12.30 | 1.30 | 3.95 | 0.90 | 0.75 | 2.80 | [64] |
| CLI, Iran | 66.50 | 11.81 | – | 3.11 | 0.72 | 2.01 | 3.12 | [65] |
| CLI, Brazil | 68.79 | 11.71 | 5.25 | 3.34 | 1.31 | 2.75 | 0.62 | [66] |
| CLI, Mexico | 70.17 | 11.07 | 1.12 | 1.73 | 0.35 | 0.83 | 4.90 | [67] |