| On rock samples of Minghuazhen geothermal reservoir in the Kaifeng City as the research object, according to the differences of typical ion in pore geothermal water and the rock media, carrying out laboratory simulation experiments on 40?, 60? for ion exchange adsorptionIon between Ca2+ and Na+. Research has made some progress:(1) The study uses Cl- as a non-reactive solute, The DL by fitting vertical diffusion coefficient with CXTFIT 2.1 software of Cl- is 13.6cm2/h, 14.9cm2/h at 40?, 60?, respectively.(2) For the one-component migration, the retardation coefficients of Ca2+ were 1.14, 1.11, the time of initial penetration of Ca2+ is 1.00, 0.94 PV, the time of fully penetration of Ca2+ is 1.74, 1.51 PV and C/C0 of Ca2+ is 0.98-1.02, 0.92-0.94 at 40?, 60?, respectively. Indicating that the blocking ability of the rock samples to Ca2+ reduces at 60?, it is easy to penetrate the soil column; The time of initial penetration of Na+ is 4.44, 3.63 PV at 40?, 60?, respectively. Because of part adsorption, Na+ can't achieve full penetration. The migration of Na+ is affected by adsorption and ion exchange.(3) For two component migration, the relative mass concentration of Ca2+ is 1.58-1.68, 1.34-1.39 at 40?, 60?, respectively. At 40?, the time of initial penetration, fully penetration of Ca2+ is 0.08, 0.21 PV faster than the one-component migration and at 60?, the time is 0.13, 0.32 PV faster. Ion exchange makes Ca2+ penetration faster in two component migration. The initial penetration of Na+ compared to the one-component migration in advance 2.57, 1.95 PV at 40?, 60?, respectively. |
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