title: Remediation of a historically Pb contaminated soil using a model natural Mn oxide waste.
abstract: A natural Mn oxide (NMO) waste was assessed as an in situ remediation amendment for Pb contaminated sites. The viability of this was investigated using a 10 month lysimeter trial, wherein a historically Pb contaminated soil was amended with a 10% by weight model NMO. The model NMO was found to have a large Pb adsorption capacity (qmax 346±14 mg g(-1)). However, due to the heterogeneous nature of the Pb contamination in the soils (3650.54-9299.79 mg kg(-1)), no treatment related difference in Pb via geochemistry could be detected. To overcome difficulties in traditional geochemical techniques due to pollutant heterogeneity we present a new method for unequivocally proving metal sorption to in situ remediation amendments. The method combines two spectroscopic techniques; namely electron probe microanalysis (EPMA) and X-ray photoelectron spectroscopy (XPS). Using this we showed Pb immobilisation on NMO, which were Pb free prior to their addition to the soils. Amendment of the soil with exogenous Mn oxide had no effect on microbial functioning, nor did it perturb the composition of the dominant phyla. We conclude that NMOs show excellent potential as remediation amendments.
authors.affiliation: Newcastle University, School of Civil Engineering and Geosciences, Newcastle upon Tyne NE1 7RU, United Kingdom. Electronic address: clare.mccann@newcastle.ac.uk.
authors.forename: Clare M
authors.initials: CM
authors.lastname: McCann
authors.affiliation: Newcastle University, School of Civil Engineering and Geosciences, Newcastle upon Tyne NE1 7RU, United Kingdom.
authors.forename: Neil D
authors.initials: ND
authors.lastname: Gray
authors.affiliation: Durham University, School of Engineering and Computing Sciences, Durham DH1 3LE, United Kingdom.
authors.forename: Janette
authors.initials: J
authors.lastname: Tourney
authors.affiliation: Newcastle University, School of Civil Engineering and Geosciences, Newcastle upon Tyne NE1 7RU, United Kingdom.
authors.forename: Russell J
authors.initials: RJ
authors.lastname: Davenport
authors.affiliation: Newcastle University, School of Civil Engineering and Geosciences, Newcastle upon Tyne NE1 7RU, United Kingdom.
authors.forename: Matthew
authors.initials: M
authors.lastname: Wade
authors.affiliation: Durham University, School of Engineering and Computing Sciences, Durham DH1 3LE, United Kingdom.
authors.forename: Nina
authors.initials: N
authors.lastname: Finlay
authors.affiliation: Department of Earth and Planetary Sciences, Birkbeck, University of London, Malet St., London WC1E 7HX, United Kingdom.
authors.forename: Karen A
authors.initials: KA
authors.lastname: Hudson-Edwards
authors.affiliation: Durham University, School of Engineering and Computing Sciences, Durham DH1 3LE, United Kingdom.
authors.forename: Karen L
authors.initials: KL
authors.lastname: Johnson
mesh_terms: D000327:Adsorption; D052918:Environmental Restoration and Remediation / Q000379:methods*; D007220:Industrial Waste; D007854:Lead / Q000032:analysis*; D017895:Manganese Compounds / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D007220:Industrial Waste; D017895:Manganese Compounds; D010087:Oxides; D012987:Soil; D012989:Soil Pollutants; D007854:Lead; C027424:manganese oxide
keywords: Contaminated soil; Heterogeneity; In situ remediation; Lead; Manganese oxide