Dual-continuum analysis of a cadmium tracer field experiment

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• 作者：Tomas Vogel ; Lubomir Lichner ; Jaromir Dusek ; Andrea Cipakova
• 关键词：Batch test ; Cadmium ; Distribution coefficient ; Dual-continuum system ; Macropores ; Particle-facilitated transport ; Preferential flow ; Radioactive tracer ; Sorption ; Vadose zone
• 刊名：Journal of Contaminant Hydrology
• 出版年：2007
• 出版时间：16 June 2007
• 年：2007
• 卷：92
• 期：1-2
• 页码：50-65
• 全文大小：305 K

文摘

Cadmium penetration into a sandy–loam soil during the field ponded infiltration at Kralovska luka site in Southern Slovakia was observed in a controlled experiment. Adsorption of cadmium was examined using the radioactive tracer techniques in laboratory batch tests. Quite deep ^115mCd penetration during the field experiment (65 cm beneath the soil surface) gives evidence of the particle-facilitated transport of cadmium through preferential pathways. More than 40 % of the applied cadmium moved deeper than 10 cm. The field experiment was analyzed using both conventional single-continuum approach (based on Richards' equation for water flow and advection–dispersion equation for Cd transport) and dual-continuum approach. The latter approach allowed us to simulate more adequately the observed movement of cadmium.