Sorption of TCE to the caliche soil exhibited linear isotherm at the high TCE concentrations (Co=122-1300 mg L(-1)) but Freundlich isotherm at the low concentration range (1-122 mg L(-1)). Sorption strength of the carbonate fraction of the soil was about 100-fold lower than the sorption strength of soil organic matter (SOM) in the caliche soil, indicating weak affinity of TCE for the carbonate ...

El presente artículo se adentra en la condición de infancia Pampa Salitrera del distrito minero Taltal 1900-1920, su vinculación con el sistema educación formal y mundo trabajo, un contexto, por lado, expansión salitre modernización, otro, escasa legislación laboral no obligatoriedad instrucción primaria, que va configurando una experiencia niñez pampina alejada los parámetros modernos ésta, ac...

Contamination of freshwater resources, fresh produce and some processed foods by perchlorate (ClO4 -) is a growing problem in the United States. The anion perchlorate is a naturally occurring as well as an anthropogenic chemical which occurs as salts of ammonium, sodium and potassium. The natural sources of perchlorate include Chilean caliche which is mined for use as a natural source of NaNO3 ...

cally, water is assumed to be immobile at the residualwater saturation. In the petroleum industry, the residAt many contaminated sites, nonaqueous phase liquids (NAPLs) ual-water saturation is also called the irreducible-water persist in the vadose zone for long periods of time. This occurs because the permeability of the NAPL becomes negligible at some saturation saturation. This terminology h...