Comparison of the adsorption capacity of various adsorbents for uranium.

Adsorbent	q max (mg g−1)	pH	References
Titanium loaded collagen fiber	130	5	51
Tannins immobilized collagen membrane	56.8	5	52
Collagen–tannin resin	216.5	6	53
GPNB-BT	254.8	5.5	This work