Our field of expertise includes geochemistry, ecotoxicology of metallic elements, sediment dynamics, transport modeling, plume dispersion and geochemical studies of mine tailings behavior.
AEL / LEA is a specialized laboratory, recognized for the measurement of trace metallic elements in waters or atmospheric dusts. However, it also excels in the analysis of trace nutrients, especially in seawater.
Our analytical skills, tested annually by inter-calibration exercises with institutional and private laboratories, place the laboratory among the best. Our analytical capabilities allows us to analyze a number of different sample types including sea water, fresh water, sediments, soils, living organisms and the atmosphere for mineral (metals, AOx, ..) and organic compounds (PAHs, PCBs, …).
Over the years, AEL / LEA has developed an extensive knowledge of the geochemical behavior of pollutants / contaminants and sedimentation processes. Thus, in terms of environmental monitoring, the laboratory is able to:- monitor dissolved and particulate matter fluxes in the marine environment resulting from natural and / or industrial sources;- monitor sediment accumulation rates and the geochemical quality of deposits;- monitor water quality by using passive samplers (DGT, DET, …) or by the transplantation of sentinel species (active bio-monitoring);- perform ingested dose calculations for the assessment of health risk due to bioaccumulation of pollutants in edible species; monitor metallic pollutants in atmospheric deposits via rainwater and / or dust.
Hydrodynamic and atmospheric modeling
Given the primary use of modeling is to support decision-making, AEL / LEA has strengthened its knowledge in this area in order to perform invaluable predictive calculations and provide concrete answers to water management concerns.
AEL/LEA services include:
- 3D hydrodynamic modeling of marine currents;
- the simulation of the dissolved matter plume dispersion;
- the simulation of particulate transport and determination of sediment deposit areas;
- the simulation of the transport and decay of bacterial germ populations.
To support the modeling, AEL / LEA can:
- perform current measurement and determine a range of physicochemical parameters in water bodies;
- highlight water mass dynamics using dye tracer and in-situ fluorimetric detection (eg: Rhodamine WT).
AEL / LEA, in collaboration with the CEA*, also offers 3D atmospheric modeling for the simulation of plume dispersion.*The French Alternative Energies and Atomic Energy Commission
Characterization of waste
AEL/LEA performs routine tests for New Caledonia’s mining industry. Using internationally recognized standardized (ISO) procedures AEL/LEA performs static and dynamic leaching tests on mining waste (sludge, slag, tailings). In addition, AEL/LEA can carry out flume studies coupled with an in-house rainfall simulator.