Adsorbent Ability of Treated Peganum harmala-L Seeds for the Removal of Ni (II) from Aqueous Solutions: Kinetic, Equilibrium and Thermodynamic Studies

Table 3

Thermodynamic constants for the adsorption of Ni ions on TPHS.

Adsorbent	Maximum capacity (mg/g)	Optimum condition	References
Pomegranate peel	51.80	𝑇 = 25°C; pH = 5.5–6.5; adsorbent dosage = 10 g/L	Bhatnagar and Minocha [10]
Litchi chinensis seeds	66.62	𝑇 = 25°C; pH = 7.5; adsorbent dosage = 1 g/L	Flores-Garnica et al. [22]
Acid-treated Oedogonium hatei	44.24	𝑇 = 25°C; pH = 5.0; adsorbent dosage = 0.7 g/L	Gupta et al. [23]
Moringa oleifera bark	26.84	𝑇 = 30°C; pH = 6.0; adsorbent dosage = 0.4 g/L	Reddy et al. [24]
Saccharum bengalense	15.79	𝑇 = 60°C; pH = 5.0; adsorbent dosage = 10 g/L	Din and Mirza [25]
Modified Moringa oleifera leaves powder	138.04	𝑇 = 20°C; pH = 6.0; adsorbent dosage = 10 g/L	Reddy et al. [26]
Treated Peganum harmala-L seeds	91.74	𝑇 = 25°C; pH = 7.0; adsorbent dosage = 0.7 g/L	This study