| 可膨胀性层状粘土矿物对铜离子吸附机理的模拟研究 |
| 摘要点击 1717 全文点击 1773 投稿时间：1999-11-13 |
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| 中文关键词 Cu-蒙脱石 吸附机理 电子顺磁共振 |
| 英文关键词 Cumontmorillonite adsorption mechanism electron paramagnetic resonance |
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| 中文摘要 |
| 对 Cu-蒙脱石、Cu-蒙脱石的热产物及其复水产物进行了 XRD、EPR和 DTA研究 .在 Cu-蒙脱石的 EPR谱中同时记录到了 g=2 .1 4、g=2 .0 7(精细结构线 )、g～ 2 .7- 2 .2 (超精细结构线 ) 3组 Cu2+的信号 ,分别对应于蒙脱石层间水合铜离子、进入 Si-O四面体片复三方形孔洞和铝氧八面体空位中的 Cu2+,阐明了蒙脱石对重金属离子的吸附以交换吸附和专性吸附 2种方式进行 . |
| 英文摘要 |
| In this paper,Cumontmorillonites,their thermal products and rehydrated products were studied using XRD,EPR,DTA,etc.In the EPR spectra of Cumontmorillonites,three signals related with Cu2+ are recorded simultaneously.They are respectively located at g=207,g=214 which are fine lines and g～2227 which is supper fine line.It is proposed that there are three different structural states of Cu2+.g=214 signal is related with hydrated copper ions existing in the interlayer of Cumontmorillonite and g=2.07 signal is related with Cu2+ migrating into ditrigonal cavities of SiO sheet while the hyperfine line of g～2.22.7 reflects Cu2+ migrating into octahedral vacancies.It suggests that there are two adsorption styles for montmorillonite to heavy metals,exchangeable adsorption and special adsorption. |
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