Table 3.

Different Polymeric adsorbents used for removal of various toxic metal ions.

S. No.	Adsorbent	Adsorption Capacity	Reference
1	Poly (ethylene glycol dimetharylate-n-vinyl imidazole)	1. Hg = 74.2 mg/g 2. Pb = 92.5 mg/g 3. Cd = 45.6 mg/g	[26]
2	Poly (vinyl pyrrolidinone)	1. Hg = 26.5 mg/g 2. Pb = 20.2 mg/g 3. Cd = 15.3 mg/g	[164]
3	Poly (hydroxy ethyl methacrylate-L-glutamic acid)	1. Hg = 26.8 mg/g 2. Pb = 42.5 mg/g 3. Cd = 17.6 mg/g	[165]
4	Poly (2-hydroxy ethyl methacrylate-methacrylolmidophenylalanine)	1. Hg = 669.4 mg/g 2. Pb = 584.4 mg/g 3. Cd = 268.4 mg/g	[165]
5	Acrylonitrile onto polypropylene fiber having diethylene triamine group	Hg = 657.9 mg/g	[166]
6	Polyurethane	1.Pb = 236.5 mg/g 2.Ni = 217.5 mg/g	[167]
7	Porous attapulgite (ATP)/polyethersulfone beads	1.Cu = 25.3 mg/g 2.Cd = 32.7 mg/g	[168]
8	amidoxime improved polyacrylonitrile (PAN) nanofibers	1.Cu = 52.70 mg/g 2. Pb = 263.45 mg/g	[169]