Sustainable Soil Remediation. Phytoremediation Amended with Electric Current
| Autor: | S. Urrejola, Claudio Cameselle, Susana Gouveia |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
2. Zero hunger
chemistry.chemical_classification Topsoil biology Intercropping 02 engineering and technology 010501 environmental sciences 15. Life on land 021001 nanoscience & nanotechnology biology.organism_classification 01 natural sciences Lolium perenne 6. Clean water Phytoremediation chemistry Agronomy Phytotechnology Soil water Brassica rapa Environmental science Organic matter 0210 nano-technology 0105 earth and related environmental sciences |
| Zdroj: | Environmental Geotechnology-Proceedings of EGRWSE 2018 Lecture Notes in Civil Engineering ISBN: 9789811370090 Lecture Notes in Civil Engineering Lecture Notes in Civil Engineering-Environmental Geotechnology |
| ISSN: | 2366-2557 2366-2565 |
| DOI: | 10.1007/978-981-13-7010-6_4 |
| Popis: | Phytoremediation amended with electric fields has been proposed as a coupled technology to enhance the remedial capacity of green plants. The application of an electric field may enhance the bioavailability of contaminants as well as favor the biomass production. This study deals with the effect of the electric field in the electrochemical properties of the soil in terms of pH and electric conductivity. The objective is to determine the response of the soil to the application of a DC electric field in order to determine the appropriate voltage gradient that does not provoke dramatic changes in the pH and electric conductivity, avoiding serious damage to the plants. The selected voltage gradient can be used in the design of an electro phytotechnology that does not compromise the survival of plants. Three different soils were tested in this study: clayey soil, agricultural soil with organic matter, and topsoil. The clayey soil showed the highest resistance to pH changes. This soil was selected to grow plant species with remedial capacity: Phalaris Canariensis, Brassica Rapa, Zea Mays and Lolium perenne L. B. rapa showed the fastest growing in the presence of a constant electric potential gradient of 0.67 DCV/cm. B. rapa and L. perenne were tested in the electro-phytoremediation of soil 3 contaminated with 400 mg/kg of Cr, 200 mg/kg of Pb and 200 mg/kg. Plant cultures with electricity showed better removal of heavy metals than the tests with no electricity. The mixed culture of B. rapa and L. perenne was able to remove significant amounts of the three heavy metals, suggesting that intercropping may generate a synergic effect on phytoremediation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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