Research Article
Adsorption of Arsenate from Aqueous Solution onto Modified Vietnamese Bentonite
Table 3
Parameters of pseudo-first-order and pseudo-second-order kinetic model of As(V) adsorption by Fe-B and Al-B at different temperatures.
| Adsorbent | T (K) | qe (experimental) (mg/g) | First-order kinetic model | Second-order kinetic model | k1 (min−1) | qe (cal) (mg/g) | R2 | k2 (g/mg·min) | qe (cal) (mg/g) | R2 |
| Fe-B | 283 | 14.38 | 0.010 | 15.19 | 0.942 | 0.35 × 10−3 | 21.14 | 0.924 | 293 | 14.42 | 0.013 | 12.44 | 0.977 | 0.68 × 10−3 | 19.80 | 0.973 | 303 | 14.42 | 0.027 | 9.80 | 0.962 | 4.20 × 10−3 | 15.53 | 0.999 | 313 | 14.44 | 0.021 | 6.57 | 0.992 | 7.30 × 10−3 | 14.97 | 0.998 |
| Al-B | 283 | 18.47 | 1.6 × 10−3 | 16.35 | 0.956 | 1.0 × 10−3 | 22.22 | 0.984 | 293 | 20.75 | 1.9 × 10−3 | 13.01 | 0.948 | 2.9 × 10−3 | 22.22 | 0.998 | 303 | 20.80 | 7.0 × 10−3 | 8.56 | 0.949 | 4.2 × 10−3 | 20.83 | 0.992 | 313 | 21.05 | 9.0 × 10−3 | 7.09 | 0.752 | 5.8 × 10−3 | 21.28 | 0.996 |
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