Research Article
Reaction Kinetics of Sodium Bentonite with Different Acid Systems: An Experimental Study
Table 1
Statistics of experimental data on the reaction of different types of acids with sodium bentonite.
| | Acid composition | The initial concentration (%) | Amount of substance after reaction (mol/L) | Reaction speed (mol/s) |
| | HCl | 5 | 0.518 | 3.137 × 10−8 | | 7 | 0.669 | 3.378 × 10−8 | | 10 | 0.945 | 4.147 × 10−8 | | 13 | 1.362 | 4.703 × 10−8 | | 15 | 1.882 | 5.794 × 10−8 |
| | HF | 5 | 0.330 | 3.511 × 10−7 | | 7 | 0.610 | 5.814 × 10−7 | | 10 | 0.733 | 6.456 × 10−7 | | 13 | 0.953 | 7.792 × 10−7 | | 15 | 1.799 | 1.334 × 10−6 |
| | CH3COOH | 5 | 0.921 | 9.563 × 10−9 | | 7 | 1.183 | 1.016 × 10−8 | | 10 | 1.505 | 1.126 × 10−8 | | 13 | 1.859 | 1.192 × 10−8 | | 15 | 2.390 | 1.272 × 10−8 |
| | HCl + HF | 5 | 0.715 | 1.660 × 10−7 | | 7 | 0.793 | 1.715 × 10−7 | | 10 | 0.985 | 2.138 × 10−7 | | 13 | 1.410 | 2.801 × 10−7 | | 15 | 1.572 | 3.171 × 10−7 |
| | HCl + CH3COOH | 5 | 0.610 | 3.536 × 10−8 | | 7 | 0.777 | 4.090 × 10−8 | | 10 | 1.197 | 4.861 × 10−8 | | 13 | 1.565 | 5.424 × 10−8 | | 15 | 1.938 | 6.165 × 10−8 |
| | HF + CH3COOH | 5 | 0.550 | 3.478 × 10−7 | | 7 | 0.718 | 3.792 × 10−7 | | 10 | 0.937 | 4.320 × 10−7 | | 13 | 1.257 | 4.813 × 10−7 | | 15 | 1.599 | 5.516 × 10−7 |
| | HCl + HF + CH3COOH | 5 | 1.127 | 2.492 × 10−7 | | 7 | 1.346 | 2.905 × 10−7 | | 10 | 1.583 | 3.534 × 10−7 | | 13 | 1.855 | 4.206 × 10−7 | | 15 | 2.198 | 5.102 × 10−7 |
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