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首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >Silanized humic substances act as hydrophobic modifiers of soil separates inducing formation of water-stable aggregates in soils
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Silanized humic substances act as hydrophobic modifiers of soil separates inducing formation of water-stable aggregates in soils

机译：硅烷化腐殖质充当土壤的疏水改性剂，可诱导土壤中水稳性团聚体的形成

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摘要

In this study we successfully enhanced surface activity of natural humic substances (HS) with respect to mineral surfaces by functionalization with organosilanes. Of particular importance was that modification was conducted in water. Humates from coal and peat and 3-aminopropyl-triethoxysilane (APTES) were used as starting materials. Atomic force microscopy showed silanized HS produced self-assembled adsorption monolayers at the water-solid interface. These adlayers caused an increase in the surface hydrophobicity with contact angles equaling 56 degrees. Application of silanized HS for treatment of different soil compartments including mineral soil separates and soil aggregates revealed an efficacy with respect to both re-assembly of soil aggregates and restoration of their water stability. Furthermore, field trials on the treatments of native sod-podzolic soil with silanized HS indicated improvements in soil structure as compared to non-treated soil or treatment with the non-functionalized humate. Results demonstrating the use of silanized HS as ecologically-safe, nature-inspired soil conditioners were promising. (C) 2015 Elsevier B.V. All rights reserved.
机译：在这项研究中，我们通过有机硅烷功能化成功地增强了天然腐殖质（HS）相对于矿物表面的表面活性。特别重要的是，修饰是在水中进行的。煤和泥煤中的腐殖质以及3-氨基丙基-三乙氧基硅烷（APTES）被用作起始原料。原子力显微镜显示，硅烷化的HS在水-固体界面处产生了自组装的吸附单层。这些添加物导致表面疏水性增加，接触角等于56度。硅烷化HS在不同土壤分区（包括矿物土壤分离物和土壤团聚体）的处理中的应用显示出在重新组装土壤团聚体和恢复其水稳定性方面的功效。此外，对用硅烷化的HS处理天然草皮土壤的田间试验表明，与未处理的土壤或未官能化腐殖酸盐处理相比，土壤结构有所改善。证明将硅烷化的HS用作生态安全，受自然启发的土壤改良剂的结果很有希望。 （C）2015 Elsevier B.V.保留所有权利。

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