Table 5.

Comparison study of sorption capacity (q_e) of Cd(II), IBU and MB for different biosorbents.

Biosorbent	qe (mg/g)	Pollutant	Reference
Pomegranate husk carbon/Fe(II)–Fe(III) NP	92.75	Cd(II)	This study
Pinecone	92.70		[76]
Barley husk	75.20		[77]
Pomegranate husk activated carbon	68.60		[78]
Modified pomegranate husk	46.29		[79]
Rice husk biochar	17.8		[80]
Activated coconut husk	76.92	IBU	[81]
Activated carbon oak	45.45		[82]
Pomegranate husk carbon/Fe(II)–Fe(III) NP	39.80		This study
Cocoa shell	38.95		[83]
Sugarcane bagasse	13.51		[84]
Olive waste cake	12.90		[85]
Banana peel	250.0	MB	[14]
Watermelon rinds	188.8		[12]
Coconut leaf	112.3		[27]
Pomegranate husk carbon/Fe(II)–Fe(III) NP	95.77		This study
Palmyrah sprout casing	27.67		[86]
Maize stalk pith	7.330		[87]