Experimental determination of hydrodynamic dispersion coefficients for heavy metals using compacted clay

Camur, MZ
Yazıcıgil, Hasan
Mass transport of ions through the Ankara clay liner, which was prepared under three different compaction conditions, was studied experimentally on the basis of sorption, advection and hydrodynamic dispersion processes. Under optimum compaction conditions, effective porosity and hydraulic conductivity of the material were 0.32 and 0. 13-0.26 x 10(-8) cm s(-1), respectively. Effective diffusion coefficients of Cd, Cl, Cr, Cu, Fe, K, Mg, Mn, Ni, Pb and Zn ions were, respectively, 2.54, 9.51, 2.22, 2.85, 2.22, 7.93. 2.54, 3.08, 1.59, 3.17 and 2.54 (x 10(-6)) cm(2) s(-1). Two materials, prepared using half of the optimum water content but optimum energy conditions (II), and optimum water content but half of the optimum energy conditions (HI), have effective porosities of 0.35 and 0.40, respectively. Hydraulic conductivities of these materials were 3.1-4.38 x 10(-8) cm s(-1) and 916-1057 x 10(-8) cm s(-1). Dispersivities were 0.96 cm and 2.0 cm in materials II and III, respectively.


Laboratory determination of multicomponent effective diffusion coefficients for heavy metals in a compacted clay
Çamur, Mehmet Zeki; Yazıcıgil, Hasan (2005-01-01)
Diffusion and sorption of heavy-metal ions (Cd, Cr, Cu, Fe, K, Mn, Ni, Plb, and Zn) through an Ankara clay liner were studied experimentally. The Ankara clay consists of calcite, quartz, smectite and illite, and is a highly plastic inorganic clay with optimum weight water content of 32% and corresponding dry density of 1.413 g/cm(3). U nder optimum compaction conditions, effective porosity (volumetric water content) and hydraulic conductivity in the material were determined as 0.45 and 1.3 to 2.6x10(-9) cm/...
Effects of compaction parameters on heavy metal mass transport in Ankara clay liner: Experimental approach
Çamur, Mehmet Zeki; Yazıcıgil, Hasan (2007-01-01)
Mass transports of Cl, Cd, Cr, Cu, Fe, K, Mn, Ni, Pb and Zn ions through the Ankara clay liner prepared under two different compaction were studied experimentally on the bases of sorption and hydrodynamic dispersion processes. According to geotechnical tests, the Ankara clay material is highly plastic, inorganic clay having a liquid limit of 73, a plastic limit of 29 and a plasticity index of 44. Optimum compaction of the material requires 32% water content and 1.413 g/cm(3) dry density. Two materials, prep...
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Citation Formats
M. Camur and H. Yazıcıgil, “Experimental determination of hydrodynamic dispersion coefficients for heavy metals using compacted clay,” 2001, p. 283, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/66151.