Comparison of the adsorption capacities of various metal ion adsorbents for Hg(ii) and Pb(ii) ions.

Adsorbent	Adsorption capacities (mg g−1)		Reference
	Pb(ii)	Hg(ii)
Fe3O4–SO3H MNP	108.93	—	36
MCB	37.99	—	37
XMCS	76.9	—	38
Modified microalgae residuals	—	62.5	39
Modified activated carbons	—	41.0	40
Fe3O4-GS	23.03	27.95	41
TPY-M	64.75	33.94	This study