Capacities of clay fraction of a latosol to retain cations and anions as inferred from the Wien effect in soil suspensions
文献类型：期刊论文
| 作者 | Li, CB; Friedman, SP; Zhao, AZ |
| 刊名 | PEDOSPHERE
 |
| 出版日期 | 2003-05-01 |
| 卷号 | 13期号:2页码:165-172 |
| 关键词 | bonding strength capacity of retaining ions electrical conductivity latosol Wien effect in suspensions |
| ISSN号 | 1002-0160 |
| 通讯作者 | Li, CB() |
| 英文摘要 | Suspensions of a latosol with a clay concentration of 30 g kg(-1) were prepared from electrodialyzed clay fractions, less than 2 mum in diameter, five nitrate solutions with a concentration of 1 x 10(-4)/z mol L-1, where z is the valence, and five sodium salt solutions with a concentration of 3.3 x 10(-5)/z mol L-1. The direct current (DC) electrical conductivities (ECs) of the colloidal suspensions were measured at a constant temperature of 25 degreesC, using a newly established method of measuring the Wien effect in soil suspensions at field strengths ranging from 13.5 to 150 kV cm(-1), to determine their electrical conductivity-field strength relationships and to infer the order of the bonding strength (retaining force) between soil particles and various ions. The measurements with the latosol suspensions in NaNO3, KNO3, Ca(NO3)(2), Mg(NO3)(2) and Zn(NO3)(2) solutions resulted in increments of the suspension ECs, DeltaECs, of 7.9, 5.0, 7.1, 7.0 and 5.8 muS cm(-1), respectively, when the applied field strength increased from 14.5 to 142 kV cm(-1). As for the suspensions in NaNO3, NaCl, Na2SO4, Na3PO4 and Na3AsO4 Solutions, the DeltaECs were 6.2, 5.3, 4.1, 4.0 and 3.7 muS cm(-1), respectively, when the applied field strength increased from 13.5 to 90 kV cm(-1). Thus, it can be deduced that the retaining forces of the clay fraction of the latosol for the cations were in the descending order K+ > Zn2+ > Mg2+ greater than or equal to Ca2+ > Na+ and for the anions in the descending order H2AsO4- > H2PO4- > SO42- > Cl- > NO3-. |
| 收录类别 | SCI |
| WOS关键词 | VARIABLE-CHARGE SOILS |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000186055900009 |
| 出版者 | SCIENCE CHINA PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2559235 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Li, CB |
| 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,Friedman, SP,Zhao, AZ. Capacities of clay fraction of a latosol to retain cations and anions as inferred from the Wien effect in soil suspensions[J]. PEDOSPHERE,2003,13(2):165-172. |
| APA | Li, CB,Friedman, SP,&Zhao, AZ.(2003).Capacities of clay fraction of a latosol to retain cations and anions as inferred from the Wien effect in soil suspensions.PEDOSPHERE,13(2),165-172. |
| MLA | Li, CB,et al."Capacities of clay fraction of a latosol to retain cations and anions as inferred from the Wien effect in soil suspensions".PEDOSPHERE 13.2(2003):165-172. |
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来源：南京土壤研究所
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