5.1 Introduction
Unlike many organic compounds, the heavy metals considered in this part of the study are primarily sourced from industrial processes. The 12 metals studied were:
- antimony*
- arsenic*
- beryllium*
- cadmium*
- cobalt*
- copper
- lead*
- manganese*
- nickel*
- selenium*
- vanadium
- zinc.
Eleven metals have been nominated as `hazardous air pollutants' by the US EPA and nine of these (marked with an asterisk above) were included in the group of metals in the study. The other two US EPA metals (mercury and chromium VI) were not included as they could not be analysed by the method used here. Three other metals-copper, vanadium and zinc-were also analysed.
Page last updated: 26 February 2011
