Adsorption of Chromium(VI) from Aqueous Solutions by Coffee Polyphenol-Formaldehyde/Acetaldehyde Resins

Table 6

Comparison of adsorption of Cr(VI) with naturally occurring adsorbents.

Sr. no.	Biosorbent	Cr(VI) (mg/g)	Reference no.
1	Rice husk carbon	45.6	[31]
2	Iron(III) hydroxide	0.47	[32]
3	Waste tea	1.63	[33]
4	Irish sphagnum moss peat	119	[34]
5	Saw dust	10.1, 16.05, 4.44	[35–37]
6	Blast furnace slag	7.5	[38]
7	Activated red mud	1.6	[39]
8	Waste tyre	58.48	[40]
9	Olive cake	33.44	[41]
10	Distillery sludge	5.7	[42]
11	Coffee husk	44.95	[43]
12	CFA and CAA resins	175.44, 143.32	This study