Characteristics and mechanisms of Pb(II) sorption onto Fe-rich waste water treatment residue (WTR): A potential sustainable Pb immobilisation technology for soils
A new paper co-authored by Karen Hudson Edwards. See https://doi.org/10.1016/j.jhazmat.2020.123433 for full details, and here are the highlights:
Water treatment residual comprises 70 % ferrihydrite & 23 % organic matter.
Pb(II) sorption to water treatment residual depends on initial Pb(II) load, particle size, time & pH.
Pb(II) was sorbed mainly to the ferrihydrite component of water treatment residual.
Pb(II) sorption occurs by bidentate edge-sharing and monodentate or corner-sharing.
Water treatment residual could be a long-term effective adsorbent of Pb(II) in contaminated soils.