Ethnographical Investigation in Nexquipayac (México) at the LAST salt producer by lixiviation of salty soil. The production of salt through this process is an ancient but dying tradition.
Lixiviation is a physical-chemical process by which a soluble substance (in this case salt) contained by an insoluble medium (in our case, soil with a very high concentration of sodium chloride) is extracted through dissolution (''solvation'') in water or other solvent (steam, alcohol, etc. The process in commonly called ''leaching''; in chemistry of industry, the technique is also know as ''extraction'' or ''percolation''). The soluble substance is subsequently recovered from the solution through evaporation or precipitation.
This clip is the result of a serie of ethnographical inquiries concerning traditional salt production techniques in use across the world, undertaken by Romanian and French researchers (for more info, please see the project's webpage: http://ethnosal.uaic.ro ).
Field team: Marius-Tiberiu Alexianu PhD (team manager), Roxana-Gabriela Curcă PhD Canditate, Vasile Cotiugă PhD (camera).
Special thanks to Blas Román Castellón Huerta PhD (Instituto Nacional de Antropología e Historia, México).