SEM technique was also employed to study the surface structureand morphology of powders generated from Cactus cladodes, fruitpeels and wastes.Fig. 3(aee) shows the SEM images.The micrographs revealed the surface texture (rough) andporosity together with the presence of multilayers that wereinvolved in the adsorption process (Kumar and Barakat, 2013). Thepollutant removal ability of OFI derived biosorbents also emanatedfrom the presence of irregularly shaped and sized cavities evidentonFigs. 2 and 3that allowed for the adsorption of different sizedparticles/molecules/ions (Pelaez-Cid et al., 2013a).
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