Fe₃O₄ Nanoparticles Embedded Sodium Alginate/PVP/Calcium Gel Composite for Removal of Cd²⁺

Table 1

The concentration of metal ions from the river sediment.

Sediment	Cd	As	Cr	Cu	Pb	Ni
Sample 1	0.125	—	0.723	0.307	0.916	0.382
Sample 2	0.036	—	1.096	0.632	0.41	0.556
Sample 3	0.034	—	1.079	0.614	0.415	0.561