A new method to estimate adsorption energies between cations and soil particles via wien effect measurements in dilute suspensions and an approximate conductivity - Activity analogy
文献类型：期刊论文
| 作者 | Li, CB; Zhao, AZ; Friedman, SP |
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2005-09-01 |
| 卷号 | 39期号:17页码:6757-6764 |
| ISSN号 | 0013-936X |
| DOI | 10.1021/es050070b |
| 通讯作者 | Friedman, SP() |
| 英文摘要 | Measurement of the Wien effect (increased electrical conductivity at strong electrical fields) in soil suspensions is proposed as the basis of a new method to characterize energy relationships between cations and soil particles. The simplified theory behind the method, the working principle of the short high-voltage pulse apparatus, and the measuring procedure are outlined briefly. The new method was used to evaluate the adsorption energies of two monovalent(Na, K) and two diva lent (Ca, Cd) cations on yellow-brown soil and black soil particles, assuming an analogy between the activity of the cations and their contribution to the electrical conductivity of the suspension. Both the mean free bonding energies, Delta G(bo), and the adsorption energies, Delta G(ad), of the cations for these two soils increased in the order: Na < K < Ca < Cd. Under the conditions of our experiments, estimated Delta G(bo) ranged from 4.7 to 6.4 kJ mol(-1) and from 7.0 to 8.2 kJ mol(-1) for mono- and divalent cations, respectively. The bonding energies obtained with the new method were similar to those determined previously by ionic activity measurement. The determined mean adsorption energies of cations desorbed at a field strength of 100 kV cm(-1), for example, ranged from 0.7 to 1.2 kJ mol(-1) and from 1.9 to 2.3 kJ mol(-1) for mono- and divalent cations, respectively. |
| 收录类别 | SCI |
| WOS关键词 | COLLOIDAL SUSPENSION ; DISPERSED PARTICLES ; CALCAREOUS SOILS ; ZINC ADSORPTION ; CLAY FRACTION ; DOUBLE-LAYER ; MONTMORILLONITE ; DESORPTION ; EXCHANGE ; SURFACE |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| WOS类目 | Engineering, Environmental ; Environmental Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000231723800064 |
| 出版者 | AMER CHEMICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558504 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Friedman, SP |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China 2.Agr Res Org, Volcani Ctr, Inst Soil Water & Environm Sci, IL-50250 Bet Dagan, Israel |
| 推荐引用方式 GB/T 7714 | Li, CB,Zhao, AZ,Friedman, SP. A new method to estimate adsorption energies between cations and soil particles via wien effect measurements in dilute suspensions and an approximate conductivity - Activity analogy[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2005,39(17):6757-6764. |
| APA | Li, CB,Zhao, AZ,&Friedman, SP.(2005).A new method to estimate adsorption energies between cations and soil particles via wien effect measurements in dilute suspensions and an approximate conductivity - Activity analogy.ENVIRONMENTAL SCIENCE & TECHNOLOGY,39(17),6757-6764. |
| MLA | Li, CB,et al."A new method to estimate adsorption energies between cations and soil particles via wien effect measurements in dilute suspensions and an approximate conductivity - Activity analogy".ENVIRONMENTAL SCIENCE & TECHNOLOGY 39.17(2005):6757-6764. |
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来源：南京土壤研究所
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