Pyrolytic behavior of a zero-valent iron biochar composite and its Cu(ii) removal mechanism

Abstract

The Cu(ii) removal mechanism on ZBC8-3 involved the reduction of Cu(ii) by Fe0 to produce Cu0 and Cu2O, while CC, C–O–, –O–H formed a complex with Cu(ii).

One-pot synthesis of spherical nanoscale zero-valent iron/biochar composites for efficient removal of Pb(ii)

“…The increased ionic volume weakened the stretching and bending vibrations of the functional groups, thus causing a downeld shi. 48,49 The vibration band of C-O aer Pb(II) removal shied higheld as compared with that before adsorption, phenomenon attributed to the inductive effect. 50 New bands at 476.83, 573.22 and 1417.05 cm À1 , corresponding to Fe-O stretching can be observed in the spectrum of AIBC aer Pb(II) adsorption.…”

“…Hence, band of O-H and C]O shied down-eld, indicating the formation of a complex with Pb(II). The increased ionic volume weakened the stretching and bending vibrations of the functional groups, thus causing a downeld shi 48,49. The vibration band of C-O aer Pb(II) removal shied higheld as compared with that before adsorption, phenomenon attributed to the inductive effect 50.…”