Fig. 4From: Unveiling the potential of a functionalized pyrrole-based polymer for efficient cadmium ion removal from wastewater: synthesis, characterization, and performance evaluationa UV–visible spectra, the inset graphs show energy bang gap. b Emission spectra at λexc. 280 nm, and the inset photo shows the CIE diagram of PAK, PAPh, and PAPDBack to article page