Mixed Maghemite/Hematite Iron Oxide Nanoparticles Synthesis for Lead and Arsenic Removal from Aqueous Solution

Figure 7

Adsorption isotherms fitting curves of (a) As on IO-NH, IO-K, and IO-NH according to models Langmuir and Freundlich models, (b) Pb on IO-NH, IO-K, and IO-NH according to models Langmuir and Freundlich models at pH = 8, initial concentration of 10 mg/L, mass of 0.1 g.

(a)

(b)