acid extracted sewage sludge – Resin screening in weak acid media. White Rose Research Online URL for this paper: https://eprints.whiterose.ac.uk/145396/ Version: Supplemental Material ... pH Fe Pb Zn Cu Pb Zn Cu Fe Zn Cu Fe Pb 3.26 49.1 30.5 40.9 0.0204 0.623 0.834 0.0327 1.61 1.34 0.0244 1.20 0.746 3.62 15.7 27.3 18.7 0.0636 1.74 1.19 0. ...