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xiaohelala銀蟲 (正式寫手)
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[求助]
水滑石吸附污染物機理請教 已有2人參與
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| 各位大神,我最近在看水滑石吸附染料的文獻,尤其對里面的機理搞不懂,當然通過表征來看吸附前后的LDH,那樣的機理我能明白,但是有很多是靠吸附動力學(xué)來說明機理,我就不懂了,比如These results indicate that the pseudo-secondorder model is more suitable in describing the adsorption kinetics of MO ions on MgNiAl–C. The pseudo-second-order model is based on the adsorption loading of the solid phase and is in agreement with a chemisorption mechanism being the rate-determining step. Another advantage of the pseudo-second-order model is that it predicts the behavior over the whole range of the adsorption process.To identify the diffusion mechanism in the adsorption of MO ions on MgNiAl–C, intraparticle mass transfer diffusion model proposed by Weber and Morris (Eq. (5)) was used [41] 然后通過這個方程得出結(jié)論 :These results indicate that increasing the MO concentration of the solution seems to reduce the rate of diffusion of MO in the boundary layer and to enhance the diffusion in the solid。 我的問題是這個說明了機理是什么?肯定不是離子插入。表面吸附還是啥的呢 ,望大神能說得具體點,小弟實在是笨。 |
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個人見解哈,僅供樓主參考。 To identify the diffusion mechanism in the adsorption of MO ions on MgNiAl–C, intraparticle mass transfer diffusion model proposed by Weber and Morris (Eq. (5)) was used [41] 然后通過這個方程得出結(jié)論 :These results indicate that increasing the MO concentration of the solution seems to reduce the rate of diffusion of MO in the boundary layer and to enhance the diffusion in the solid。 就是說,為探討吸附機理,運用intraparticle mass transfer diffusion model去擬合數(shù)據(jù),得到結(jié)論MO濃度增加將減少 MO在邊界層擴散速率和增加在固體中的擴散速率,說的是孔間擴散控制吸附主體過程 |


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