Influence of biological activity on 65Zn and 109Cd removal from tidal water by chronically-polluted mangrove sediments
| Autor: | Melissa N. Sondermann, E. C. Machado, K. N. Suzuki, A. V. B. Bellido, Wilson Machado, Ricardo Tadeu Lopes, L. F. Bellido |
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| Přispěvatelé: | Repositório da Universidade de Lisboa |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010504 meteorology & atmospheric sciences
Health Toxicology and Mutagenesis Biogeochemical barrier chemistry.chemical_element 010501 environmental sciences Metal sorption Mangrove sediments 01 natural sciences Analytical Chemistry Tidal water Radiology Nuclear Medicine and imaging Spectroscopy 0105 earth and related environmental sciences Cadmium Public Health Environmental and Occupational Health Sediment Biological activity Metal pollution Pollution Zinc Radiotracers Nuclear Energy and Engineering chemistry Benthic zone Environmental chemistry Environmental science Mangrove |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| Popis: | The biological activity influence on the mangrove sediment capacity to remove 65Zn and 109Cd 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 109Cd (~ 38%) than for 65Zn (~ 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. |
| Databáze: | OpenAIRE |
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