Adsorption of methylene blue from aqueous solution using a low cost Sclerocarya birrea fruit shell powder based biosorbent was investigated in a batch system. Results showed that optimum adsorption capacity was achieved at pH 8 and biosorbent dosage of 0.6 g, with a maximum adsorption capacity of 27.690 mg g -1 . Equilibrium studies showed that experimental data fitted well on the Temkin isotherm (R 2 = 0.9641), as well as the Langmuir isotherm (R 2 = 0.9626). The adsorption process followed the pseudosecond order rate kinetics with R 2 values greater than 0.999. Fourier transform infrared spectroscopy (FTIR) spectrum showed the presence of absorption bands typical of a plant based biomaterial. Given the abundant availability of the S. birrea trees in Southern Africa, the seed fruit shell can be used as a source of low cost biosorbent.
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