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. 2021 Jul 24;7(3):103. doi: 10.3390/gels7030103

Figure 1.

Figure 1

(A) Chemical structures of the chitosan (CS), glutaraldehyde (GA), zeolite (Z), ethylenediaminetetraacetic acid-functionalized CS (CS-EDTA) and diethylenetriaminepentaacetic acid-functionalized CS (CS-DTPA) used to prepare the composite materials tested as sorbents for copper(II), cobalt(II) and iron(III) removal from binary and ternary systems. (B) SEM micrographs of CSZ, CSZ-EDTA and CSZ-DTPA composite sorbents; (C) EDX profiles and the corresponding weight percentages of elements present on the surface of CSZ, CSZ-EDTA and CSZ-DTPA composite sorbents.