| Surface chemical properties and pedogenesis of tropical soils derived from basalts with different ages in Hainan, China | |
| Jiang, Jun; Xu, Ren-kou; Zhao, An-zhen | |
| 刊名 | CATENA
 |
| 2011-12-01 | |
| 卷号 | 87期号:3页码:334-340 |
| 关键词 | Tropical soil Surface charge Zeta potential PZNC IEP Clay minerals |
| ISSN号 | 0341-8162 |
| DOI | 10.1016/j.catena.2011.06.016 |
| 通讯作者 | Xu, Ren-kou(rkxu@issas.ac.cn) |
| 英文摘要 | Limited information is available on the changes of surface chemical properties of tropical soils with time during the pedogenesis. Soil samples of three profiles derived from basalts of 10, 1330 and 2290 kilo annum (ka) in age were collected from adjacent locations in a tropical region of Hainan Province, China. The changes in soil surface chemical properties and the mineralogy of the soil clay fraction with time were investigated using ion adsorption, micro-electrophoresis, and X-ray diffraction analysis. The content of 2:1-type clay minerals decreased, while those of kaolinite and gibbsite increased with increasing basalt age and degree of soil development. The content of pedogenic free iron (Fe) oxides and the ratio of free Fe oxides/total Fe oxides increased with soil development stage, while soil poorly crystalline Fe and aluminum (Al) oxides had an opposite trend. The positive surface charge of the soils increased with increasing basalt age and degree of soil development; this was consistent with the change in their contents of free Fe/Al oxides. However, the value of negative surface charge had an opposite behavior. The soil derived from 10-ka-basalt had much more negative charge than soils derived from 1330- and 2290-ka-basalt. Soil net surface charge and zeta potential of the soil clay-fraction decreased with the increase in basalt age. Both net charge-pH curves and zeta potential-pH curves shifted to positive values with increased basalt age and degree of soil development. Increasing age also elevated the point of zero net charge of the soil and the isoelectric point of soil colloids. (C) 2011 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | VARIABLE CHARGE SOILS ; MINERALOGY ; ADSORPTION |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| WOS类目 | Geosciences, Multidisciplinary ; Soil Science ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000295769100005 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2558875 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Xu, Ren-kou |
| 作者单位 | Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Jun,Xu, Ren-kou,Zhao, An-zhen. Surface chemical properties and pedogenesis of tropical soils derived from basalts with different ages in Hainan, China[J]. CATENA,2011,87(3):334-340. |
| APA | Jiang, Jun,Xu, Ren-kou,&Zhao, An-zhen.(2011).Surface chemical properties and pedogenesis of tropical soils derived from basalts with different ages in Hainan, China.CATENA,87(3),334-340. |
| MLA | Jiang, Jun,et al."Surface chemical properties and pedogenesis of tropical soils derived from basalts with different ages in Hainan, China".CATENA 87.3(2011):334-340. |
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