Journal of Chemistry / 2015 / Article / Tab 2

Research Article

Kinetic and Thermodynamic Studies on the Phosphate Adsorption Removal by Dolomite Mineral

Table 2

Estimated kinetic model parameters for phosphate adsorption by dolomite.

Intraparticle diffusion model:
Initial phosphate concentration/(mg/L)/(mg/(g·min1/2))SD

100.89900.01040.9401 0.00661
302.51340.04900.9518 0.02769
504.00650.09660.9222 0.07055
703.44070.30890.9682 0.14076
90−1.30360.85810.9630 0.4227

Pseudo-first-order model:
Initial phosphate concentration/(mg/L)/(min−1)/(mg/g)SD

101.54211.01100.9821 0.0039
302.51603.04260.9805 0.0022
503.19235.06690.9989 0.0004
709.59296.93240.9826 0.0035
9057.462810.48110.9631 0.0201

Elovich model:
Initial phosphate concentration/(mg/L)α/(mg/(g·min))/(g/mg)SD

103.79750.27510.9766 0.41284
306.15050.17570.9866 0.48756
507.51680.14710.9731 0.82918
7030.70530.06550.9886 1.20612
9020.09060.03140.9182 0.95821

Pseudo-second-order model:
Initial phosphate concentration/(mg/L)/(g/(mg·min))/(mg/g)SD

100.56371.01481.0000 0.2412
300.11683.05860.9999 0.0901
500.06025.07431.0000 0.0185
700.01297.08770.9985 0.1978
900.000813.65190.9903 1.1780

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