Journal of Earth Sciences and Geotechnical Engineering

Sodium and Calcium Salts Impact on Soil Permeability

• [ Download ]
• Times downloaded: 10715

• Abstract

  The study investigated the effect of two inorganic salts namely sodium chloride NaCl and calcium sulphate CaSO₄ on subsoils permeability. Two subsoils designated as A and B were taken from two borrow pits in Ibadan south-western Nigeria. The subsoils were contaminated with four concentrations of each salt 10, 30, 50 and 70 g/dm. The subsoils coefficients of permeability were monitored for about 364 days. The results revealed that NaCl led to increase in soil permeability while CaSO₄ brought about reduction in soil coefficient of permeability. The reduction in soil permeability by CaSO₄ was due to strong bond formed when Ca²⁺ is attracted to soil adsorbed layers while Na⁺ formed weak bond if attracted to adsorbed layer.