Environmental Sciences Europe

Table 7 Comparison of the FT-IR spectrum properties of PAP_h and PAP_D before and after adsorption of Cd²⁺ ions

From: Unveiling the potential of a functionalized pyrrole-based polymer for efficient cadmium ion removal from wastewater: synthesis, characterization, and performance evaluation

IR peaks	PAP_h		PAP_D
IR peaks	Before Ads	After Ads	Before Ads	After Ads
C = O	1691 cm⁻¹	1693 cm⁻¹	1699 cm⁻¹	1713 cm⁻¹
C = C Py	1510 cm⁻¹	1508 cm⁻¹	1511 cm⁻¹	1492 cm^-1
C = C Ar	1610 cm⁻¹	1602 cm⁻¹	1607 cm⁻¹	1601 cm⁻¹
C–N	1172 cm⁻¹	1165 cm⁻¹	1167 cm⁻¹	1156 cm⁻¹
C–N	1379 cm⁻¹	1361 cm⁻¹	1365 cm⁻¹	1356 cm⁻¹

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