Research Article

Biosorption of Lanthanides from Aqueous Solutions Using Pretreated Buccinum tenuissimum Shell Biomass

Figure 6

SEM pictures of Buccinum tenussimum shell biomass after adsorption of metals. (a) ground original sample, (b) heat-treatment (480°C) sample, (c) heat-treatment (950°C) sample, and (d) heat-treatment (950°C) and water-added sample.
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(a)
804854.fig.006b
(b)
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(c)
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(d)