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Table 8 Repeated adsorption cycles of Cu2+, Hg2+, Pb2+ and Cd2+ by DiGu-MC

From: Novel diaminoguanidine functionalized cellulose: synthesis, characterization, adsorption characteristics and application for ICP-AES determination of copper(II), mercury(II), lead(II) and cadmium(II) from aqueous solutions

Cycle number Recovery (%)
Cu2+ Hg2+ Pb2+ Cd2+
1 99.6 99.1 99.2 98.1
2 98.7 98.3 98.4 97.3
3 98.4 97.7 96.7 96.4
4 97.8 96.1 95.8 95.6
5 96.6 95.1 95.0 94.7