Ponencias (Cristalografía, Mineralogía y Química Agrícola)https://hdl.handle.net/11441/108312024-03-29T02:28:38Z2024-03-29T02:28:38ZEffect of Rhamnolipid Jbr-425 on the Development of Brassica Juncea in Soils of Urban Gardens of Sevilla (Spain).https://hdl.handle.net/11441/1327762024-02-13T22:23:51Z2020-01-01T00:00:00ZEffect of Rhamnolipid Jbr-425 on the Development of Brassica Juncea in Soils of Urban Gardens of Sevilla (Spain).
The current need to recover soils contaminated with potentially toxic metals to lessen their impact on the environment and on the food chain, leads different methods are being developed for their extraction. There is an additional concern when contamination occurs in urban farm soil. Phytoextraction can be enhanced by applying biodegradable biosurfactants, promoting the bioavailability of contaminants and their subsequent uptake by the plant. This technique is called assisted or induced phytoextraction. This work aims to evaluate the extraction of heavy metals from contaminated soils from an urban orchard in the town of Sevilla using Brassica juncea plants, as well as to estimate the improvement that the application of a biodegradable biosurfactant (Ramnolipid JBR-425) implies. For this, a greenhouse trial was carried out with two soils from an urban park and an agricultural one in which Brassica juncea was grown. A solution of Ramnolipid JBR-425 with a concentration of 1000 mg kg-1 was added to half of the pots to evaluate its effect on the development of the plants (number of leaves, plant height). The data collected showed a negative effect produced both by soil contamination and by the presence of rhamnolipid. The soil used in the experiment, as well as the plants, were collected for further analysis. Plant samples were divided into aerial part, root and fruit, to determine the amounts of heavy metals in the soil and extracted in the aerial part. The determination of heavy metals in soil was carried out by ICP-OES after AEDT extraction. Likewise, parameters such as electrical conductivity and pH were also measured. For the extraction of the metals extracted by the plants, acid digestion of the plant samples was performed and then they were measured using ICP-OES. The plants treated with rhamnolipid showed less development both in plant height and in the number of leaves; likewise, the biomass production capacity was reduced. These factors may be due to the toxic effect of rhamnolipid, as well as the effect of Potentially Toxic Elements. Although the plants with rhamnolipid application had higher concentrations of heavy metals in their tissues, since there was a notable decrease in biomass, they did not extract as much as the plants without treatment
2020-01-01T00:00:00ZInvestigaciones sobre recursos abióticos en la prehistoria reciente de Tierra de Barros y Sierra Morena Occidentalhttps://hdl.handle.net/11441/933752024-02-14T19:08:13Z2008-01-01T00:00:00ZInvestigaciones sobre recursos abióticos en la prehistoria reciente de Tierra de Barros y Sierra Morena Occidental
En este trabajo se presentan las investigaciones de base arqueométrica que se están llevando a cabo con
objeto de conocer los sistemas de abastecimiento de recursos abióticos de las comunidades del III y II
milenio ANE en los territorios de Tierra de Barros (Badajoz) y Sierra Morena occidental (Huelva y Sevilla),
a partir del análisis de artefactos elaborados con arcilla, rocas y rocas metalíferas, procedentes de contextos
habitacionales y funerarios de excavaciones y prospecciones arqueológicas. Otros análisis, entre
los que se incluyen los de Isótopos de Plomo, se realizan sobre muestras de materias primas obtenidas
en las prospecciones geológicas del entorno, con la finalidad de establecer la relación de procedencia de
los objetos manufacturados y los depósitos de los que se obtuvo el mineral; In this work the archaeometric-based research being carried out on abiotic procurement systems of the
communities of the 3rd and 2nd millennia BC in the regions of Tierra de Barros (Badajoz) and West Sierra
Morena (Huelva and Sevilla), gained from analyses of artefacts made of ceramic, rocks and metals,
recovered from funerary and habitational contexts through archaeological surveys and excavations, is
presented. Other analyses, among them Lead Isotopes, have been done on raw material samples obtained
by geological surveys in the surrounding areas, with the aim of establishing the relationship of provenance
between the manufactured objects and the deposits where the raw materials were obtained from
2008-01-01T00:00:00ZEl análisis de riesgos del patrimonio histórico como herramienta de gestiónhttps://hdl.handle.net/11441/766062024-02-17T17:56:49Z2012-01-01T00:00:00ZEl análisis de riesgos del patrimonio histórico como herramienta de gestión
Peinado Herreros, María Ángeles
2012-01-01T00:00:00ZPatrimonio natural antropizado del area minera de Río Tinto (España)https://hdl.handle.net/11441/765672024-02-14T09:03:59Z2012-01-01T00:00:00ZPatrimonio natural antropizado del area minera de Río Tinto (España)
Peinado Herreros, María Ángeles
2012-01-01T00:00:00Z