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Title: Monitoring of airborne metal pollution by moss bags: a methodological study
Authors: Castello, Miris
Keywords: metalsmonitoringmoss bagsair pollution
Issue Date: 1996
Publisher: EUT Edizioni Università di Trieste
Source: Miris Castello, "Monitoring of airborne metal pollution by moss bags: a methodological study" in: "Studia Geobotanica. An international journal, Vol. 15 (1996)", EUT Edizioni Università di Trieste, Trieste, 1996, pp. 91-103
Series/Report no.: Studia Geobotanica. An international journal
The use of moss transplants for monitoring heavy metals deposition is briefly reviewed. The methodological study concerns the effects of different types of pre-treatment on data variability. Epiphytic samples of Hypnum cupressiforme were collected from an unpolluted area, treated in different ways, and the resulting bags were exposed in two sites in the province of Trieste (NE ltaly) with widely different pollution: a natural woodland far from urban and industrial centers, and a site near an iron smelting industry in the industrial area of Trieste. The
content of eight heavy metals (Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb) was measured in 80 moss samples by atomic absorption spectrophotometry. The results, which represent a contribution to the standardization of the moss bags technique, concern: a) variability of metal conteni in mosses from natural areas: this is influenced by soil contamination; it is advisable to collect epiphytic samples, avoiding those growing near the base of the trunks; b) effects of different washing treatments on metal contents: compared to distilled water, washing with an acid solution
is particularly efficient in removing metal ions associateci with the cell wall, but produces more variable data; c) uptake capacity of exposed moss bags: this is not influenced by the type of washing, and even short periods of exposure were sufficient to reveal differences in metal depositions between the two sites.
Type: Article
Appears in Collections:15 - Studia Geobotanica. An international journal - Vol. 15 (1996)

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