Publicação
Plants indigenous to Esteiro De Estarreja - Potential for heavy metal phytoremediation
| Resumo: | worldwide with substantial economic consequences. Heavy metals are an important health hazard, causing disturbances namely at the level of muscular coordination (Zn) and of the nervous system and kidneys (Pb), problems with reproduction, physiology and morphology (Hg) and even cancer (As). Phytoremediation - the use of plants to remove or immobilise contaminants - may offer a safe and low cost method for the remediation of metal contaminated soil. The search for plants adapted to metal-stressful field conditions may be an adequate approach to find plant species with the capacity to tolerate or accumulate metals and with the potential to be applicable in further phytoremediation strategies. The area of Estarreja, in northern Portugal, is surrounded by a large industrial complex, composed essentially by chemical facilities that for many years have discharged their solid residues in an improvised sediment basin in the surrounding area, and released its wastewaters into a nearby stream - “Esteiro de Estarreja”. Despite the high levels of metals in the sediments, the vegetation in the banks of the stream remains prolific, yet heterogeneously distributed with Solanum nigrum L., Rubus ulmifolius Schott and Phragmites australis (Cav.) Trin. ex Steudel being the main plant colonisers. These species have been recognized to accumulate some metals to levels above those considered as normal in plant tissues, especially Zn - 10 to 100 mg Zn kg-1, with |
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| Autores principais: | Marques, Ana P. G. C. |
| Outros Autores: | Rangel, António O. S. S.; Castro, M. L. |
| Ano: | 2009 |
| País: | Portugal |
| Tipo de documento: | capítulo de livro |
| Tipo de acesso: | acesso restrito |
| Instituição associada: | Universidade Católica Portuguesa |
| Idioma: | inglês |
| Origem: | Veritati - Repositório Institucional da Universidade Católica Portuguesa |
| Resumo: | worldwide with substantial economic consequences. Heavy metals are an important health hazard, causing disturbances namely at the level of muscular coordination (Zn) and of the nervous system and kidneys (Pb), problems with reproduction, physiology and morphology (Hg) and even cancer (As). Phytoremediation - the use of plants to remove or immobilise contaminants - may offer a safe and low cost method for the remediation of metal contaminated soil. The search for plants adapted to metal-stressful field conditions may be an adequate approach to find plant species with the capacity to tolerate or accumulate metals and with the potential to be applicable in further phytoremediation strategies. The area of Estarreja, in northern Portugal, is surrounded by a large industrial complex, composed essentially by chemical facilities that for many years have discharged their solid residues in an improvised sediment basin in the surrounding area, and released its wastewaters into a nearby stream - “Esteiro de Estarreja”. Despite the high levels of metals in the sediments, the vegetation in the banks of the stream remains prolific, yet heterogeneously distributed with Solanum nigrum L., Rubus ulmifolius Schott and Phragmites australis (Cav.) Trin. ex Steudel being the main plant colonisers. These species have been recognized to accumulate some metals to levels above those considered as normal in plant tissues, especially Zn - 10 to 100 mg Zn kg-1, with |
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