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The replacement of the nondescript term ‘heavy metals’ by a biologically and chemically significant classification of metal ions
Abstract It is proposed that the term ‘heavy metals’ be abandoned in favour of a classification which separates metal ions into class A (oxygen-seeking), class B (nitrogen/sulphur-seeking) and… Expand
Mineral uptake and release by lichens: an overview
Background and enhanced levels of elements in lichens are re- viewed, and the Fe/Ti content ratio is shown to reflect the presence of trapped particulates. The following uptake and release mechanisms… Expand
Mercury levels in lichens from different host trees around a chlor-alkali plant in New Brunswick, Canada.
- Marion Sensen, D. Richardson
- Environmental Science, Medicine
- The Science of the total environment
- 3 July 2002
Mercury concentrations were determined in the epiphytic lichen Hypogymnia physodes along five transects starting from a chlor-alkali plant located at Dalhousie, New Brunswick, a landfill site and a… Expand
THE UPTAKE OF METAL IONS BY LICHENS: A MODIFIED ION-EXCHANGE PROCESS
SUMMARY Heavy metal ions were absorbed by lichens to different degrees in laboratory experiments. The relative capacities for uptake from solutions containing a single metal ion were Fe, Cu > Ni> Pb… Expand
Uranium accumulation in the lichen Cladonia rangiferina. Part II. Toxic effects of cationic, neutral, and anionic forms of the uranyl ion
The toxicity of the uranyl ion to the lichen Cladonia rangiferina (L.) Wigg. was shown to be strongly dependent on chemical speciation. Photosynthetic measurements indicated that the anionic comple...
The Uptake of Nickel Ions by Lichen Thalli of the Genera Umbilicaria and Peltigera
By using a dissection technique it was demonstrated that binding of Ni 2+ ions occurred to both the algal zone and fungal medulla in various species of the lichen genus Umbilicaria . The algal zone,… Expand
Lichens and mosses as monitors of industrial activity associated with uranium mining in northern Ontario, Canada—Part 1: Field procedures, chemical analysis and interspecies comparisons
Abstract A modified X-ray flourescence spectrometry technique allowed the detection of uranium in cryptogams with a detection limit of 0·5 to 1 μg U g−1 of plant material. The levels of five elements… Expand