Effect of Alkali Treatment of Wheat Straw on Adsorption of Cu(II) under Acidic Condition

Table 4

Comparison of adsorption capacities of wheat straw for Cu(II) removal.

Modification	pH	(mg/g)	Reference
4% NaOH	5.0	10.05	This study
10% HNO3 and 1 N NaOH	6.0	11.43	[36]
Hydrochars and 2 N KOH	5.0	11.82	[35]
Esterification	—	39.17	[37]
—	5.0	7.05	[38]
—	4.5	5.0	[39]