Research Article

Removal of Methylene Blue from Aqueous Solutions by Using Nance (Byrsonima crassifolia) Seeds and Peels as Natural Biosorbents

Figure 1

Point of zero charge (pzc) for peels (a) and seeds (b) of nance. pzc (pointed with the arrows) is found in the intersection of the 45° line with the experimental curve.
(a)
(b)