The biogeochemical behaviour of americium in subsurface soils plays a dominant role on its potential migration, but is currently poorly known. This research investigates the relevant processes controlling americium biogeochemical speciation in the rhizosphere of an agricultural soil. Lixiviation tests were performed on columns packed with a calcareous soil contaminated with Am, under steady-sta...

Contexte : Les effluents dune entreprise textile œuvrant dans le lavage et de delavage jeans sont fortement charges en colorant bleu dindigo ou Acid Blue 74 (AB74). Ils deverses grande quantite directement la riviere avoisinante. On peut donc avoir un grand risque ecologique une contamination nappe souterraine. La concentration du repandu rejet atteindre pic 343±2 mg L-1 qui varie instantanem...

Inulin-type fructans are the most studied prebiotic compounds because of their broad range of health benefits. In particular, plants of the Agave genus are rich in fructans. Agave-derived fructans have a branched structure with both β-(2→1) and β-(2→6) linked fructosyl chains attached to the sucrose start unit with a degree of polymerization (DP) of up to 80 fructose units. The objective of thi...

In this study, we aimed to determine whether Somatic coliphages (SC) and Enterovirus were good indicators to predict pathogens presence in bathing waters and if there was any correlation between them and bacterial indicators currently used (Escherichia coli (EC) and fecal Enterococci (FE)). Six beaches, two creeks and a wastewater treatment plant in Estoril Coast were sampled for the quantitati...

This paper deals with the removal of Cu(2+) from water using adsorbent materials prepared from paper industry waste materials (one de-inking paper sludge and other sludge from virgin pulp mill). Experimental results showed that de-inking paper sludge leads to mesoporous materials (V(mic)/V(T)=0.13 and 0.14), whereas the sludge from virgin pulp mill produces high microporous adsorbents (V(mic)/V...

Li-S batteries are ideal candidates to replace current lithium-ion as next-generation energy storage systems thanks their high specific capacity and theoretical density. Composite electrodes based on carbon microstructures often used a host for sulfur. However, sulfur lixiviation, insoluble species formation, how maximize the sulfur-carbon contact in looking improved electrochemical performance...

Heterostructures constructed with mesoporous silica and layered double hydroxides are interesting for catalytic drug delivery applications. Different arrangements between these phases possible. In this study, we prepared heterostructures by embedding [M4Al2(OH)12](CO3) (M = Mg2+ or Zn2+) within the MCM41 type phase. According to our results, most critical step of preparation is removal organic ...