Biosynthesis of iron oxide nanoparticles using algae.

Algae	Biomaterial used	Iron precursor salt	Size	Shape	Applications	Ref.
Spirulina platensis	Powder	FeCl3·6H2O (from 0.1 to 0.6 M)	<10 nm	Slightly irregular and rounded	Adsorptive removal of cationic and anionic dyes	107
Sargassum vulgare (Phaeophyceae)	Powder	FeCl3 (0.1 M)	22.73 nm	Nanospheres	Antibiofilm	204
Ulva fasciata (Chlorophyceae)	Powder	FeCl3 (0.1 M)	28.41 nm	Nanospheres	Antibiofilm	204
Jania rubens (Rhodophceae)	Powder	FeCl3 (0.1 M)	27.78 nm	Nanospheres	Antibiofilm	204
Sargassum crassifolium	Dried powder	(FeCl3 : FeCl2) (0.1 : 0.05 and 0.02 : 0.01)	40–215 nm	Quasi-spherical	—	205
Chlorella vulgaris	Powder	FeSO4·7H2O and Fe(NO3)3·9H2O	4.855, 5.702 and 3.614 nm	Amorphous biochar	Adsorbent for dye removal	206
Aegagropila linnaei	Powder	FeSO4·7H2O (0.01 mol)	100–150 nm	Geomorphic	Adsorption and Fenton-like reaction	207
Ulva lactuca	Powder	FeCl3·6H2O (28 mM), FeSO4·7H2O (14 mM)	50–80 nm	Spherical	Adsorptive removal of Pb(ii) from heavy metal bearing water	208
Ulva prolifera	Dried-refrigerated powder	FeSO4·7H2O (0.1 M)	41.23 nm	Spherical	As(iii) removal	209