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[求助]
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Sorption and diffusion are important processes for the transport of radionuclides through geomedia from a radioactive disposal facility.In this study, batch tests and through-diffusion experiments were performed to investigate the sorption and diffusion of Se(IV) in crushed granite. Different column lengths of 2, 4 and 8, were employed in the through-diffusion experiments to study the effect of the column length on the apparent diffusion coefficients. Synthetic groundwater (GW) and synthetic seawater (SW) were the liquid phases in these experiments. A two-site kinetic linear model and the Freundlich isotherm were applied to match the sorption/desorption batch data quite closely for both of GW and SW conditions. The retardation factors (Rf) were estimated by comparing the breakthrough curve of Se(IV) with that of HTO. Experimental results indicated that whether in GM or SW solution, the column lengths did not significantly affected Da or Rf of Se in crushed granite. |
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至尊木蟲 (著名寫手)
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2012293508: 金幣+100, 翻譯EPI+1, ★★★很有幫助 2015-12-05 18:21:57
| 吸附和擴散是放射性核素通過放射活性處理設施的土地介質傳播的重要過程。本研究通過批量試驗和透過擴散實驗探討Se(IV)在花崗巖碎石中的吸附和擴散。透過實驗采用長度分別為2,4和8的柱以研究柱長對表觀擴散系數(shù)的影響。人工地下水(GW)和人工海水(SW)在這些實驗中作為液相。兩點動態(tài)線性模型和弗羅因德利希等溫線與GW和SW條件下的吸附/脫吸附批量數(shù)據(jù)均達到良好匹配。通過比較從Se(IV)與從HTO得到的穿透曲線估算滯留因子(Rf)。實驗結果表明，無論在GM還是SW溶液，柱長度對Se的Da或Rf均無顯著影響。 |
2樓2015-12-05 05:07:16
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