Trace element analyses in an epiphytic lichen and its bark substrate to assess suitability for air biomonitoring.
Total concentrations of Cd, Cr, Fe, Ni, Pb and Zn were compared from October 1996 to April 1998 in Physcia biziana (Massal.) Zhalbr. v. leptophylla Vezda and in the bark of Quercus ilex L. sampled from the same trees at an urban park. Trace metal concentrations were also measured in the bark covered by the lichen thalli. The lichens showed significantly higher Cr, Fe, Ni and Zn concentrations than both uncovered and covered barks. By contrast, both types of barks had higher concentrations of Cd and Pb than lichens. Trace elements showed a wide temporal variation of concentrations both in the lichens and barks. No relationship was found between the analysed matrices as regards the time course of trace element concentrations.
Dipartimento di Arboricoltura, Botanica, Patologia Vegetale, Università degli Studi di Napoli Federico II, Portici (NA), Italy.
Annarita
A
Santitoro
Giuseppa Grazia
GG
Aprile
Daniela
D
Baldantoni
Giovanni
G
Bartoli
Anna
A
Alfani
D000393:Air Pollutants / Q000032:analysis*; D002104:Cadmium / Q000032:analysis; D004784:Environmental Monitoring / Q000379:methods*; D007558:Italy; D007854:Lead / Q000032:analysis; D008011:Lichens / Q000737:chemistry*; D024301:Plant Bark / Q000737:chemistry; D029963:Quercus / Q000737:chemistry*; D013997:Time Factors; D014131:Trace Elements / Q000032:analysis*
D000393:Air Pollutants; D014131:Trace Elements; D002104:Cadmium; D007854:Lead