Portable X-ray fluorescence (pXRF) analysis of heavy metal contamination in church graveyards with contrasting soil types

Oliver, Ian; Wisniewski, Kristopher; Pringle, Jamie; Heaton, Vivienne; Stimpson, Ian; Jeffery, Adam J.; Madden, Charles; Glanville, Helen; Dick, Henry C.; Eeley, Madeleine; Goodwin, Jonathan

Abstract

Human remains have been interred in burial grounds since historic times. Although the re-use of graveyards differs from one country, region or time-period to another, over time graveyard soil may become contaminated or enriched with heavy metal elements. This paper presents heavy metal element soil analysis from two UK church graveyard study sites with contrasting necrosols, but similar burial densities and known burial ages dating back to the 16th Century and some possibly older than 1,000 years. Portable X-Ray fluorescence (pXRF) element laboratory-based analyses were undertaken on surface and near-surface soil pellets. Results show elevated levels of Fe, Pb, Mn, Cr, Cu, Zn and Ca in both necrosols when compared with background values. Element concentration anomalies remained consistently higher than background samples down to 2 m , but reduced with distance away from church buildings. Element concentration anomalies are higher in the clay-rich necrosol than in sandy necrosol. Study results implications suggest that long-used necrosols are likely to be more contaminated with heavy-metal elements than similar soil outside graveyards with implications for burial grounds management, adjacent populations and where burial grounds have been deconsecrated and turned to residential dwellings.

• Journal Article Type: Article
• Acceptance Date: Mar 8, 2022
• Online Publication Date: Mar 22, 2022
• Publication Date: 2022-08
• Publicly Available Date: May 30, 2023
• Journal: Environmental Science and Pollution Research
• Print ISSN: 0944-1344
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 29
• Issue: 36
• Pages: 55278-55292
• DOI: https://doi.org/10.1007/s11356-022-19676-z
• Keywords: Graveyards; Burials; XRF; Element analysis; Contaminated land
• Publisher URL: https://link.springer.com/article/10.1007/s11356-022-19676-z