Fig 1.
Schematic diagram of the iron nanoparticles preparation in presence extract of moringa and tea.
Fig 2.
The FT-IR spectrum of (a) FeNPs-M and (b) FeNPs-T investigations.
Table 1.
The summarizing particle size and elemental compositions of FeNPs-M and FeNPs-T.
Fig 3.
The SEM of (a) FeNPs-M and (b) FeNPs-T investigation.
Fig 4.
The XRD profile of (a) FeNPs-M and (b) FeNPs-T.
Table 2.
The XRF of Fe3O4 nanoparticle FeNPs-M and FeNPs-T.
Table 3.
The Yield of Fe3O4 nanoparticle FeNPs-M and FeNPs-T.
Fig 5.
Adsorption of Cu2+, Pb2+, Se2+, Zn2+, and Cr6+, onto (a) FeNPs-M (b) and FeNPs-T as affected by the pH value at the optimum operating conditions.
Fig 6.
Adsorption of Cu2+, Pb2+, Se2+, Zn2+, and Cr6+, onto (a) FeNPs-M and (b) FeNPs-T as affected by the contact time at the optimum operating conditions.
Fig 7.
Influence of the mass of adsorbent (a) FeNPs-M and (b) FeNPs-T on removal of heavy metals at the optimum operating conditions.
Fig 8.
Influence of starting heavy metals level on removal efficiency using (a) FeNPs-M and (b) FeNPs-T at optimum operating conditions.
Table 4.
The correlation coefficient (R2) of Isotherm models for adsorption of heavy metals on FeNPs-M and FeNPs-T.
Fig 9.
Freundlich isotherms for heavy metals adsorption on (a) FeNPs-M and (b) FeNPs-T.
Table 5.
The adsorption kinetic models’ parameters regarding the of heavy metals onto FeNPs-M and (b) FeNPs-T.
Fig 10.
Kinetic models for heavy metals adsorption on (a) FeNPs-M and (b) FeNPs-T.
Table 6.
Represents different magnetic adsorbents for the removal of heavy metal from aqueous solutions.