15 research outputs found
Using tree leaves and barks collected from contaminated and uncontaminated areas as indicators of air metallic pollution
Use of Pavo Cristatus (Peacock) Feather Powder as Adsorbent for Removal of Cadmium Ions from Aqueous Solution
A simple micro-ELISA method for the assay of antithyroglobulin autoantibodies in human serum
Assessment of heavy-metal pollution in three different Indian water bodies by combination of multivariate analysis and water pollution indices
Adsorption of Cd ions from aqueous solutions by iron modified pomegranate peel carbons: kinetic and thermodynamic studies
Ionic liquid-decorated Fe3O4@SiO2 nanocomposite coated on talc sheets: An efficient adsorbent for methylene blue in aqueous solution
Experimental in situ exposure of the seagrass Posidonia oceanica (L.) Delile to 15 trace elements
The Mediterranean seagrass Posidonia oceanica (L.) Delile has been used for trace element (TE) biomonitoring since decades ago. However, present informations for this bioindicator are limited mainly to plant TE levels, while virtually nothing is known about their fluxes through P. oceanica meadows. We therefore contaminated seagrass bed portions in situ at two experimental TE levels with a mix of 15 TEs (Al, V,Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Ag, Cd, Pb and Bi) to study their uptake and loss kinetics in P. oceanica. Shoots immediately accumulated pollutants from the beginning of exposures. Once contaminations ended, TE concentrations came back to their original levels within two weeks, or at least showed a clear decrease. P. oceanica leaves exhibited different uptake kinetics depending on elements and leaf age: the younger growing leaves forming new tissues incorporated TEs more rapidly than the older senescent leaves. Leaf epiphytes also exhibited a net uptake of most TEs, partly similar to that of P. oceanica shoots. The principal route of TE uptake was through the water column, as no contamination of superficial sediments was observed. However, rhizomes indirectly accumulated many TEs during the overall experiments through leaf to rhizome translocation processes. This study thus experimentally confirmed that P.oceanica shoots are undoubtedly an excellent short-term bioindicator and that long-term accumulations could be recorded in P. oceanica rhizomes.PhD thesis. Coastal pollution of the Mediterranean and extension of its biomonitoring to trace elements of emerging concer