Cadmium removal capacity of various adsorbents.

Type of adsorbent	Adsorption capacity (mmol g−1)	Reference
Chitin	0.144	56
Granular activated carbon	0.090	57
Dried activated sludge	1.815	58
Rice husk	0.189	59
Modified kaolinite clay	0.392	60
Nanostructured goethite	0.259	61
nZVI	6.84	38