Authors: YiLin Jan TsingHai Wang MingHsu Li ShihChin Tsai YuanYaw Wei ChunNan Hsu ShiPing Teng
Publish Date: 2007/07/30
Volume: 273, Issue: 2, Pages: 299-306
Abstract
A good understanding of the migration of selenite SeIV through deep granitic layers depends on a good understanding of the geochemistry of these layers Chemical sequential extraction is applied herein to evaluate the ability of granite to adsorb SeIV in DW GW and SW systems The experimental results indicate that the removal of crystalline Fe oxides reduces the adsorption of SeIV suggesting its importance in granite The normalized concentrations of SeIV adsorbed onto crystalline Fe oxides is approximately 00301 00330 and 00335 mole SeIV adsorbed/mole of Fe in DW GW and SW systems Kinetic adsorption experiments are conducted to elucidate the results of the chemical sequential extraction Both the treated and the untreated granite take the same time to reach their equilibrium suggesting that crystalline Fe oxides dominate the adsorption of SeIV Meanwhile the onesite model suffices to simulate the kinetics of adsorption
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