Removal of Heavy Metal Ions (Pb²⁺, Co²⁺, and Cd²⁺) by Activated Carbon from Cypress Fruit: An Investigation of Kinetics, Thermodynamics, and Isotherms

Table 1

FT-IR results of ACC, ACC-Pb²⁺, ACC-Co²⁺, and ACC-Cd²⁺.

	ACC (cm^−1)	ACC-Pb^2+ (cm^−1)	ACC-Co^2+ (cm^−1)	ACC-Cd^2+ (cm^−1)
O-H stretching vibration	3696	3710	3369	3378
C-H stretching	2781	2672	2687	3040
C=O stretching vibration	1723	1702	1754	1754
C-H bending	1545	1567	1456	1595
Aromatic-CH group	1021	1024	932	1074
Metal ion-O stretching	—	419, 507	433, 447, 481	316, 489