Elemental analysis of the dead biomass of E. nigrum.

Table 1: Elemental analysis of the dead biomass of E. nigrum.

	Dead biomass of E. nigrum	After modification with ferric chloride nanoparticles	After biosorption of thorium	After elution by 0.1 N HCl
P	1.85	7.44	UDL	UDL
S	2.70	2.39	UDL	UDL
O	14.33	3.44	UDL	UDL
N	21.23	2.31	2.09	2.37
C	55.88	14.87	1.13	80.87
K	4.01	2.39	2.02	1.13
Fe	UDL	67.16	4.33	12.39
Th	UDL	UDL	90.43	3.25
Wt%	100	99.97	100	100.1

UDL: Under detection limit.