土壤中不同形态水的化学组成研究

南京大学学报(自然科学版) ›› 2015, Vol. 51 ›› Issue (3): 604–.

土壤中不同形态水的化学组成研究

乔冰清，陈扣平*

出版日期:2015-04-23 发布日期:2015-04-23
作者简介:(南京大学表生地球化学教育部重点实验室, 水科学研究中心, 南京,210046)

The chemical composition in different categories of soil water

Qiao Bingqing, Chen Kouping

Online:2015-04-23 Published:2015-04-23
About author:(Key Laboratory of Surficial Geochemistry, Ministry of Education, Center for Hydrosciences Research, Nanjing University, Nanjing, 210046, China)

摘要/Abstract

摘要： 采用离心法提取土壤中的重力水、毛管水和有效膜状水，对比研究了不同形态水中的化学元素组成差异。结果表明，土壤中不同形态水的化学成分存在较大差异。其中，有效膜状水中Ni、Zn、Cr、Cu和Cd的含量比毛管水中高，但Fe、As、V和Sr的含量无明显差异，这与粘土矿物表面的重金属解吸作用及重金属迁移能力等因素有关。有效膜状水中K、Ca、Na和Mg的含量较毛管水中无明显变化。受下渗水对土壤的淋滤作用及元素迁移能力等因素的影响，重力水中Ni、Zn、Cr、Cu和Cd含量较毛管水中高。与重金属元素表现不同，土壤重力水中K、Ca、Na和Mg的含量明显低于毛管水和有效膜状水。

Abstract: This paper investigated the different element composition among gravitational water, capillary water and available hygroscopic water in soil extracted by centrifugation. The results indicated distinction among the three fractions of soil water. Available hygroscopic water had higher concentrations of Ni, Zn, Cr, Cu and Cd than those of capillary water, but the content of Fe, As, V and Sr showed no differention. It was related to desorption and migration ability of heavy metal in clay minerals. Similar concentrations of K, Ca, Na and Mg were shown between available hygroscopic water and capillary water. There were higher content of Ni, Zn, Cr, Cu and Cd in gravitational water than capillary water, which were induced by interflow leaching on soil. Gravitational water had lower concentrations of K, Ca, Na and Mg than capillary water and available hygroscopic water, which was different from the performance of .heavy metal.

乔冰清，陈扣平*. 土壤中不同形态水的化学组成研究[J]. 南京大学学报(自然科学版), 2015, 51(3): 604–.

Qiao Bingqing, Chen Kouping. The chemical composition in different categories of soil water[J]. Journal of Nanjing University(Natural Sciences), 2015, 51(3): 604–.

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