Assessment of Untreated Coffee Wastes for the Removal of Chromium (VI) from Aqueous Medium

Table 3

Comparison of the q_m for Cr onto the other Adsorbents.

Adsorbent	qm (mg.g ^−1)	References
SCGs	42.9	This work
Eucalyptus bark	45	[57]
Waste black tea	9.14	[42]
Orange peels	7.14	[58]
Date stones	70	[46]
Groundnut shell	3.79	[59]
Paper mill sludge	23.18	[47]
Banana peel	10.42	[43]
Ocimum basilicum seeds	205	[60]