Eurasian Journal of Soil Science

Yazarlar: Chourouk Mathlouthi, Mariem Kacem, Zyed Mesticou, Philippe DUBUJET

Konular:Fen

DOI:10.18393/ejss.286629

Anahtar Kelimeler:Soil column,Soil leaching,Unsaturated soil,Flow rate effect

Özet: In this study, soil samples are extracted from a polluted site at different depths. Soils texture and pollutant presence are different with depth. Preliminary analyzes showed pollution by heavy metals. To simulate soil leaching operation in static condition, a series of leaching tests are conducted in laboratory column under conditions of upflow unsaturated soil. Electrical conductivity and pH measurements on the recovered leachate are performed. Different flow rates are tested. Comparison of different profiles shows that the dissolved pollutants are concentrated in the upper soil levels and disperse weakly in the lower parts which confirm the nature of anthropogenic pollution of heavy metals. Water mobilizes a high amount of dissolved ionic substances up to 80% of the initial concentration. The increase in flow rate requires more pore volume injected to achieve the maximum clearance rate. The down flow condition extracts a small amount of dissolved substances.

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