Eco-Friendly Adsorbent from Waste of Mint: Application for the Removal of Hexavalent Chromium

Table 5

Comparison of adsorption capacities of WM with other adsorbents for Cr(VI).

No.	Adsorbent	Qmax (mg/g)	pH	Ref.
1	Modified rice husk	278	2	[33]
2	Mosambi (Citrus limetta) peel	250	2	[34]
3	Modified groundnut shell	131	2	[35]
4	Chrysophyllum albidum (Sapotaceae) seed shells	84.31	3	[36]
5	Treated waste newspaper	59.88	3	[37].
6	Guar gum–nano-zinc oxide	55.56	7	[38]
7	Rice husk carbon	47.61	2	[39]
8	Eucalyptus bark	45	2	[40]
9	Wool	41.15	2	[41]
10	Olive cake	33.44	2	[42]
11	Chitosan-coated fly ash	33.27	5	[43]
12	Modified seaweed (Bifurcaria bifurcata)	29.29	5.8	[18]
13	Plantain waste	16.1		[44]
14	Saw dust	15.82	2	[45]
15	Almond	10.61	2	[46]
16	Banana (Musa Lacatan) waste	10	2	[47]
17	Tea (Camellia sinensis) waste	7.29	2	[42]
18	Pine needles	7.08	2	[48]
19	Peels of pea (Pisum sativum) pod	4.33	2	[49]
20	Waste of mint (Mentha spicata)	172	2	This work