Cadmium Removal from Aqueous Systems Using Opuntia albicarpa L. Scheinvar as Biosorbent

Table 1

Cadmium removal by biosorption.

Bioadsorbent	[Cd]i (mg L^−1)	Sorption capacity (mg/g) or removal efficiency (%)	Experimental conditions	Reference
Rice husk	11.24	26.73	[B] = 500 mg L^−1; = 25°C; pH = 2.0–6.0	[13]
Olive tree pruning waste	1–10	36.6	[B] = 100 mg L^−1; pH = 5.5; = 21 ± 0.4°C; = 120 min	[14]
Dried cladodes (Opuntia ficus)	30–300	12.07–30.42; 10.5–36.7	[B] = 500–4000 mg L^−1; pH = 2.3–6.5; = 25–60°C	[15]
Dehydrated nopal (DHN) of Opuntia albicarpa L. Scheinvar	1.6	0.14–0.275; 8.1–35.2	[B] = 500–1000 mg L^−1; pH 4.0	This study
Thermally treated nopal (TN) Opuntia albicarpa L. Scheinvar	1.6	0.39–0.23; 22.3–53.3	[B] = 500–2000 mg L^−1; pH 4.0	This study

[Cd]: initial cadmium concentration, [B]: dosage of biosorbent.