Dicyandiamide Sorption-Desorption Behavior on Soils and Peat Humus

ZHANG Hai-Jun; WU Zhi-Jie; ZHOU Qi-Xing

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Dicyandiamide Sorption-Desorption Behavior on Soils and Peat Humus

机译：双氰胺在土壤和泥炭腐殖质上的吸附-解吸行为

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The sorption-desorption behavior of dicyandiamide (DCD) is an important chemical process that affects DCD fate and mobility in soils. Therefore, this study quantified DCD sorption-desorption on a phaeozem (Mollisol), a burozem (Alfisol), a soil with organic matter-removed and peat humus using the batch-equilibration procedure, and identified soil properties that influenced DCD sorption. The sorption on peat humus was higher than that on the phaeozem and the burozem, with much lower sorption observed on the soil with organic matter-removed, indicating that soil organic matter was the main carrier of DCD sorption. Due to its amphipathic property the DCD molecule sorption on the phaeozem and the burozem decreased as pH increased from about 2 to 5, but a further increase in pH led to a rise in DCD sorption.The DCD desorption hysteretic effect for peat humus was greater than that for the phaeozem and the burozem using 0.01 mol L-1 CaC12 as the background electrolyte, suggesting that the hydrophobic domains of organic matter may play an important role in DCD sorption.

机译：双氰胺（DCD）的吸附-解吸行为是影响DCD命运和在土壤中流动性的重要化学过程。因此，本研究使用分批平衡程序定量分析了地衣（Mollisol），burozem（Alfisol），去除有机物的土壤和泥炭腐殖质上DCD的吸附-脱附，并确定了影响DCD吸附的土壤特性。泥炭腐殖质的吸附量高于phaeozem和burozem，在去除有机物的土壤上的吸附量要低得多，这表明土壤有机质是DCD吸附的主要载体。由于其两亲性，当pH从约2增加到5时，DCD分子吸附在phaeozem和burozem上的数量减少，但pH的进一步增加导致DCD吸附的增加。泥炭腐殖质的DCD解吸滞后效应大于以0.01 mol L-1 CaCl2为背景电解质对苯并ze和burozem的分析表明，有机物的疏水域可能在DCD吸附中起重要作用。

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来源
《土壤圈（英文版）》 |2004年第3期|395-399|共5页
作者
ZHANG Hai-Jun; WU Zhi-Jie; ZHOU Qi-Xing;
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作者单位

Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016 (China);

Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016 (China);

Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016 (China);

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
dicyandiamide; peat humus; soil; sorption-desorption behavior;

机译：双氰胺;腐殖质;土壤;吸附-解吸行为;

Dicyandiamide Sorption-Desorption Behavior on Soils and Peat Humus

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