. 2025 Jan 23;11(3):e42162. doi: 10.1016/j.heliyon.2025.e42162

Table 5.

Comparative table of Cr (VI) adsorption on different AC obtained by different precursors.

Precursor	Q_max Langmuir (mg/g), Cr⁶⁺
Polyethyleneimine (PEI)/Activated carbon from softwood pulp	1.58 [63]
Bermuda Grass	403.23 [64]
Petroleoum coke Feedstock	22.4 [65]
Soybean Straw	294.12 [66]
Tires Waste	142.85 [66]
Spent Coffee grounds	187.6 [67]
Somoken Butts Cigarettes	55.8 (In this research)