5 documents found, page 1 of 1
A Single Digestion Procedure for Determination of Major, Trace, and Rare Earth ...
Carvalho, Lina; Reis, Ana T.; Soares, Eugénio; Tavares, César; Monteiro, Rui J.R.; Figueira, Paula; Henriques, Bruno; Vale, Carlos; Pereira, EduardaThe simultaneous determination of major, trace, and rare earth elements in sediments requires the development of specific procedures to prevent interfer- ences. A single digestion method adapted from the EPA method 3051A is proposed for the quantification of 42 elements in sediments by inductively coupled plasma techniques associated with optical emission spectroscopy (ICP-OES) and mass spectrometry (ICP- MS). ...
Simultaneous removal of trace elements from contaminated waters by living Ulva ...
Henriques, Bruno; Teixeira, Ana; Figueira, Paula; Reis, Ana T.; Almeida, Joana; Vale, Carlos; Pereira, EduardaThis work shows the capabilities of living seaweed, Ulva lactuca, to remove As, Cd, Pb, Cu, Cr, Hg, Mn and Ni from contaminated waters. Experiments were performed with three algal doses (1.5, 3.0 and 6.0 g L-1, FW), two ionic strengths (salinity 15 and 35), and trace element concentrations corresponding to the maximum allowed values in wastewaters. The highest removals were obtained with the algal dose of 6 g L...
Comparative study on metal biosorption by two macroalgae in saline waters: sing...
Figueira, Paula; Henriques, Bruno; Teixeira, Ana; Lopes, Cláudia B.; Reis, Ana T.; Monteiro, Rui J. R.; Duarte, A. C.; Pardal, M. A.; Pereira, E.The biosorption capability of two marine macroalgae (green Ulva lactuca and brown Fucus vesiculosus) was evaluated in the removal of toxic metals (Hg, Cd and Pb) from saline waters, under realistic conditions. Results showed that, independently of the contamination scenario tested, both macroalgae have a remarkable capacity to biosorb Hg and Pb. In single-contaminant systems, by using only c.a. 500 mg of non-pr...
Comparative study on metal biosorption by two macroalgae in saline waters: sing...
Figueira, Paula; Henriques, Bruno; Teixeira, Ana; Lopes, Claudia B.; Reis, Ana T.; Monteiro, Rui J. R.; Duarte, A. C.; Pardal, M. A.; Pereira, E.The biosorption capability of two marine macroalgae (green Ulva lactuca and brown Fucus vesiculosus) was evaluated in the removal of toxic metals (Hg, Cd and Pb) from saline waters, under realistic conditions. Results showed that, independently of the contamination scenario tested, both macroalgae have a remarkable capacity to biosorb Hg and Pb. In single-contaminant systems, by using only c.a. 500 mg of non-pr...
Hg transfer from contaminated soils to plants and animals
Rodrigues, S. M.; Henriques, B.; Reis, Ana T.; Duarte, A. C.; Pereira, E.; Römkens, P. F. A. M.Understanding the transfer of mercury (Hg) from soil to crops is crucial due to Hg toxicity and Hg occurrence in terrestrial systems. Previous research has shown that available Hg in soils contributes to plant Hg levels. Plant Hg concentrations are related to soil conditions and plant characteristics. Mechanistic models describing such soil–plant interactions are however difficult to quantify. Here we performed ...