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A factor influence study of trace element bioaccumulation in moss bags
M Cesa1, B Campisi, A Bizzotto
1Dipartimento di Biologia, Università di Trieste (TS), Via Giorgieri 10, I-34127, Trieste, Italy. mattiacesa@libero.it
Archives of Environmental Contamination and Toxicology
|January 25, 2008
Summary
Mosses accumulate trace elements, with uptake influenced by water concentration and interactions between metals. Iron (Fe) often antagonizes uptake, while chromium (Cr) can enhance lead (Pb) and zinc (Zn) accumulation.
Area of Science:
- Environmental Science
- Biomonitoring
- Ecotoxicology
Background:
- Trace element contamination in aquatic ecosystems is a significant environmental concern.
- Mosses, such as Rhynchostegium riparioides, are effective bioindicators for monitoring water quality.
- Understanding metal interactions is crucial for accurate biomonitoring of industrial effluents.
Purpose of the Study:
- To quantify trace element uptake by mosses under varying concentrations.
- To investigate the main effects and interactions of 11 trace elements on moss bioaccumulation.
- To assess the influence of metal interactions on biomonitoring accuracy.
Main Methods:
- Laboratory exposure of Rhynchostegium riparioides moss bags to 11 trace elements.
- Application of a saturated fractional factorial design with 67 treatment combinations.
- Analysis of element uptake ratios and multiple regression modeling to identify interactions.
Main Results:
- Bioaccumulation was directly proportional to water concentration.
- Uptake ratios varied significantly (10^2 to 10^5) and were influenced by other co-existing metals.
- Highest uptake ratios observed for Aluminum (Al), Copper (Cu), Chromium (Cr), Mercury (Hg), and Lead (Pb).
- Identified antagonistic (e.g., Fe) and synergistic (e.g., Cr on Pb and Zn) interactions among elements.
- Interaction strengths varied from weak (Cd, Hg) to strong (As, Cr, Pb).
Conclusions:
- Trace element uptake by mosses is complex, involving both concentration-dependent and interactive effects.
- Metal interactions, including antagonism and synergism, significantly impact bioaccumulation.
- Biomonitoring of industrial sites requires consideration of multiple contaminant interactions for reliable assessment.
