SD 0.156 Intra particle diffusion 0.999 R2 258.1 a Elovich model 0.022 b SD 0.089 0.996 R2 Table 4: Comparison of adsorption capacities of the adsorbents. Adsorbent Adsorption pH Max Conc. Fit isotherm Reference capacity (mg/L) Fine dolomite 377.8 (mg P/g) 2 2000 Current study Redlich‒Peterson Iron-loaded tannin gel 31.3 (mg/g) 200 Freundlich [1] ‒ 4.69 (mol/g) 5 Langmuir [15] Alunite ‒ 29.7 (mg/g) 300 Langmuir [30] Mesoporous ZrO2 2‒3 36.0 (mg/g) 3 40.0 Freundlich/ Langmuir [32] Fe–Mn binary oxide Peat 8.91 (mg/g) 6.5 Langmuir [35] ‒
Intra particle diffusion SD 0.156 R2 0.999 Elovich model a 258.1 b 0.022 SD 0.089 R2 0.996 Table 4: Comparison of adsorption capacities of the adsorbents. Adsorbent Adsorption capacity pH Max Conc. (mg/L) Fit isotherm Reference Fine dolomite 377.8 (mg P/g) 2 2000 Redlich‒Peterson Current study Iron-loaded tannin gel 31.3 (mg/g) ‒ 200 Freundlich [1] Alunite 4.69 (mol/g) 5 ‒ Langmuir [15] Mesoporous ZrO2 29.7 (mg/g) 2‒3 300 Langmuir [30] Fe–Mn binary oxide 36.0 (mg/g) 3 40.0 Freundlich/ Langmuir [32] Peat 8.91 (mg/g) 6.5 ‒ Langmuir [35]