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OALib Journal期刊
ISSN: 2333-9721
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土壤中不同形态水的化学组成研究
DOI: 10.13232/j.cnki.jnju.2015.03.017
Keywords: 粘土,离心法,重力水,毛管水,膜状水,元素组成
Abstract:
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。
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