orphology analysis was done byWahab et al. (2012)to understand the microscopic structure of the surface and biosorptionmechanisms of the Cactus leaffibres. The Cactus leaffibre surfacewas found to be rough, cracked and contained cavities that could beinvolved in biosorption of pollutants (NH4þ) through the intraparticle diffusion mechanism. Energy dispersive X-ray analysisEDX) confirmed the significant decrease in Kþand Ca2þon thebiosorbent after sorption of NH4þions which was evidence for theexistence of an ion exchange mechanism of biosorption between ions in Cactus leaf fibres and NH4þions (Wahab et al., 2012)
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