Waste-Tire-Derived Activated Carbon as Efficient Adsorbent of P-Nitrophenol from Wastewater

Table 4

Quantification of oxygen groups on 650-2 surface.

Boehm’s titration	650-2
Carboxyl group (mmol g^−1)	0.023
Lactone group (mmol g^−1)	1.253
Phenolic group (mmol g^−1)	0.793
Total basic groups (mmol g^−1)	1.376