A novel method for removal of Cr(VI) using polypyrrole magnetic nanocomposite in the presence of unsteady magnetic fields

Insight into the synergistic effect on adsorption for Cr(vi) by a polypyrrole-based composite

“…38 However, the removal was still higher than 60% aer the four adsorption-desorption processes, possibly due to the formation of stable network of PPy/Fe 3 O 4 /ATP composite. 39 The low cost of the separation and regeneration of a material is critical for its application as an adsorbent and will make the adsorbent in large-scale application. In our absorption experiment, the PPy/Fe 3 O 4 /ATP was separated from the solution with the external magnetic eld, and this separation process could be nish quickly.…”

Removal of fluoride ions using a polypyrrole magnetic nanocomposite influenced by a rotating magnetic field

“…These adsorption peaks were ascribed to the C]N bond, C]C stretch, C-N stretch, C-H or C-N in-plane deformation, C-C vibration, C-H in-plane deformation, C-C out of plane deformation vibration and out of plane C-H vibration of pyrrole. 21,[31][32][33] The change in the IR peak values aer adsorption was ascribed to the development of a chemical bond between functional groups existing on the nanocomposite and uoride.…”

“…The lateral binding of chains driving into contact by the effect of MF was observed to signicantly increase the chain polydispersity with intensication in the magnetic eld leading to increase collision of chains and improved particle contact area with the uoride solution. 19,31,33 3.6. Adsorption isotherms…”

The development of a ternary nanocomposite for the removal of Cr(vi) ions from aqueous solutions

“…Therefore, at higher pH, the repulsion between anionic chromium spices with negative surface charges on the PANI/Ag (AMPSA)/GO QDs nanocomposite plays a major role in decreasing the adsorption efficiency. 10,25,[29][30][31][32] Although, the R of Cr(VI) from solution at pH 12 using PANI/Ag (AMPSA)/GO QDs NC is only 61%, this value is much higher than other adsorbents. [28][29][30]33 3.1.2 Mechanism of Cr(VI) removal.…”