Fig. 4

XRD patterns for (1) bentonite clay, (2) CPTES-bentonite clay, (3) [Co(II) TP-OHPP]/CPTES-bentonite clay 2 composite, (4) chitosan, (5) bentonite clay/chitosan, (6) CPTES−bent/Cs, (7) [Co(II)TP-OHPP]/CPTES−Bent/Cs 3 composite.