Publications by authors named "Gregoire Pascaud"
Immobilization of Pb from mine sediments in metakaolin-based geomaterials.
Environ Sci Pollut Res Int
May 2019
Article Synopsis
- The study investigates the feasibility of creating geomaterials using Pb-contaminated mining sediments as a substitute for metakaolin (MK) without pre-activation.
- It explores the chemical behaviors of two types of silicate solutions (sodium and potassium) and examines how alkali treatment affects lead speciation and leaching.
- Results show that mining sediment can be incorporated up to 50% into the geomaterial, with mechanical properties stable up to 10% substitution, while lead phases are effectively stabilized in the MK-based matrix with a waste incorporation of 25-30%.
Phytoremediation of metalloids by conifers is not widely studied although they may be relevant for several contaminated sites, especially those located in cold areas and sometimes under dry climates. Here, seeds of Douglas fir were sown in greenhouse on three soils collected in two French former mines: a gold mine (soils L1 and L2) and a lead and silver mine (soil P). These soils are highly contaminated by Pb, As, and Sb at different concentrations.
View Article and Find Full Text PDFAreas polluted by the persistent presence of metal(loid)s induce health problems, especially when recreational activities (on land or water) promote human exposure to the pollutants. This study focuses on one of the most encountered worldwide mining waste, i.e.
View Article and Find Full Text PDF