Influence of biological activity on 65Zn and 109Cd removal from tidal water by chronically-polluted mangrove sediments

Influence of biological activity on 65Zn and 109Cd removal from tidal water by chronically-polluted mangrove sediments

The biological activity influence on the mangrove sediment capacity to remove 65 Zn and 109 Cd from tidal water was evaluated in a site chronically polluted. Benthic Activity Indexes (BAI), corresponding to relative estimates of biological impact on radiotracer accumulation, were higher for 109 Cd (...

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Veröffentlicht in:Journal of radioanalytical and nuclear chemistry 2018, Vol.316 (2), p.429-434
Hauptverfasser: Sondermann, M. N., Suzuki, K. N., Machado, E. C., Machado, W., Bellido, L. F., Lopes, R. T., Bellido, A. V. B.
Format: Artikel
Sprache:eng
Schlagworte:
Biological activity
Chemistry
Chemistry and Materials Science
Diagnostic Radiology
Diffusion layers
Hadrons
Heavy Ions
Inorganic Chemistry
Nuclear Chemistry
Nuclear Physics
Physical Chemistry
Sediments
Water pollution
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Zusammenfassung:The biological activity influence on the mangrove sediment capacity to remove 65 Zn and 109 Cd from tidal water was evaluated in a site chronically polluted. Benthic Activity Indexes (BAI), corresponding to relative estimates of biological impact on radiotracer accumulation, were higher for 109 Cd (~ 38%) than for 65 Zn (~ 10%) in the top centimetre of sediment. However, BAI exceeded 96% for deeper sediment layers. This apparent decrease in radiotracer diffusion into deep sediments through biological activity inhibition is stronger than reported for much less polluted mangrove nearby, suggesting that benthic organisms tolerant of chronic metal pollution may affect metal sorption mechanisms.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-018-5796-2