16 documents found, page 1 of 2
Catalog of total excitation-emission and total synchronous fluorescence maps wi...
Foudeil, S.; Hassoun, H.; Lamhasni, T.; Ait Lyazidi, S.; Benyaich, F.; Haddad, M.; Choukrad, M.; Boughdad, A.; Bounakhla, M.; Bounouira, H.The purpose of this research is to develop a direct spectrometric approach to monitor soils and waters, at a lower cost than the widely used chromatographic techniques; a spectrometric approach that is effective, reliable, fast, easy to implement, and without any use of organic solvents whose utilization is subject to law limitation. It could be suitable at least as an alert method in case of massive contaminat...
Geochemistry, mineralogy, solid-phase fractionation and oral bioaccessibility o...
Reis, A. P.; Patinha, C.; Wragg, J.; Dias, A. C.; Cave, M.; Sousa, A. J.; Costa, C.; Cachada, A.; Ferreira da Silva, E.; Rocha, F.; Duarte, A.An urban survey of Lisbon, the largest city in Portugal, was carried out to investigate its environmental burden, emphasizing metallic elements and their public health impacts. This paper examines the geochemistry of lead (Pb) and its influence on human health data. A total of 51 soil samples were collected from urban recreational areas used by children to play outdoors. The semi-quantitative analysis of Pb was...
The prediction of PAHs bioavailability in soils using chemical methods: state o...
Cachada, A.; Pereira, R.; da Silva, E. Ferreira; Duarte, A. C.The evaluation of the available fraction of hydrophobic organic contaminants (HOCs) is extremely important for assessing their risk to the environment and human health. This available fraction, which can be solubilized and/or easily extracted, is believed to be the most accessible for bioaccumulation, biosorption and/or transformation by organisms. Based on this, two main types of chemical methods have been dev...
Major inputs and mobility of potentially toxic elements contamination in urban ...
Cachada, A.; Dias, A. C.; Pato, P.; Mieiro, C.; Rocha-Santos, T.; Pereira, M. E.; Da Silva, E. Ferreira; Duarte, A. C.Soil quality in urban areas is affected by anthropogenic activities, posing a risk to human health and ecosystems. Since the pseudo-total concentrations of potentially toxic elements may not reflect their potential risks, the study of element mobility is very important on a risk assessment basis. This study aims at characterising the distribution and major sources of 34 elements in two Portuguese urban areas (L...
DVINE – The Douro vineyards, World Heritage Patrimony: Assessing the impact of ...
Patinha, Carla; Reis, Paula; Ferreira da Silva, Eduardo; Cachada, A.; Sousa, A.J.; Terroso, D.; Rocha, Fernando; Vidinha, A.D.; Almeida, M.Port wine vineyards along the margins of the Douro River are socio-culturally important, as Port wine is a world class agricultural product. While the tradition and economic beneficts of the crop are considerable, the intensive use of fertilizers, fungicides and pesticides to disease control in the vineyard is corrently raising public concern. The principal aim of this project is to assess the effect of intensi...
Characterization and validation of a Portuguese natural reference soil to be us...
Caetano, A. L.; Gonçalves, F.; Sousa, J. P.; Cachada, A.; Pereira, E.; Duarte, A. C.; Ferreira da Silva, E.; Pereira, R.This study describes the first attempt to validate a Portuguese natural soil (PTRS1) to be used as reference soil for ecotoxicological purposes, aimed to both: (i) obtain ecotoxicological data for the derivation of Soil Screening Values (SSVs) with regional relevance, acting as a substrate to be spiked with ranges of concentrations of the chemicals under evaluation and (ii) act as control and as substrate for t...
Lead availability in soils from Portugal's Centre Region with special reference...
Patinha, C.; Reis, Amélia P.; Dias, Ana Cláudia; Cachada, A.; Adão, Rui; Martins, H.; Ferreira da Silva, E.; Sousa, A. J.Previous environmental biomonitoring studies indicated higher environmental lead (Pb) pollution levels at the districts of Aveiro and Leiria (Portugal). In evaluating the risk for human health, which is associated with contaminated soils after oral uptake, total soil concentrations have generally been held against criteria established from toxicological studies based upon the assumption that the uptake of the c...
Levels, sources and potential human health risks of organic pollutants in urban...
Cachada, A.; Pato, P.; Rocha-Santos, T.; Silva, E. Ferreira da; Duarte, A. C.Urban soil quality may be severely affected by PAH and PCB contamination, impairing environmental and human health. A comprehensive study was conducted in two contrasting Portuguese urban areas (Lisbon and Viseu) in order to assess the levels of these contaminants and potential risks to human health, to identify sources and study their behavior in soils. The concentrations of PAHs and PCBs were related to the s...
Pesticide application to agricultural fields: effects on the reproduction and a...
Santos, M. J. G.; Ferreira, M. F. L.; Cachada, A.; Duarte, A. C.; Sousa, J. P.The objective of this work was to assess the impact of pesticide application to non-target soil organisms simulating what happens following pesticide application in agricultural fields and thus obtaining higher realism on results obtained. For that purpose, three commercial formulations containing the insecticides chlorpyrifos and endosulfan and the herbicide glyphosate were applied to a Mediterranean agricultu...
In situ aquatic bioassessment of pesticides applied on rice fields using a micr...
Marques, C. R.; Pereira, R.; Antunes, S. C.; Cachada, A.; Duarte, A. C.; Gonçalves, F.This study assessed the effects of episodic contamination on a drainage canal adjacent to an area of intensive rice production (Coimbra, Portugal). Four monitoring periods were considered [i) before herbicide application (day –14), ii) at the first application day (day 0), iii) 3 or 5 and iv) 6 days after]. Each one consisted in three complementary evaluation lines: a) physico-chemical analyses, b) whole efflue...