Characteristics of soil salt crust formed by mixing calcium chloride with sodium sulfate and the possibility of inhibiting wind-sand flow.
Characteristics of soil salt crust formed by mixing calcium chloride with sodium sulfate and the possibility of inhibiting wind-sand flow.
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氯化钙与硫酸钠混合形成的土壤盐结皮特征及抑制风沙流的可能性
DOI：
10.1038/s41598-021-89151-1
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发表时间：
2021-05-07
影响因子：
4.6
通讯作者：
Fu X
中科院分区：
文献类型：
--
作者：
Li S;Li C;Fu X
土壤盐结皮可以改变风沙土的结构，提高其抗风蚀能力。选择风成土中含量较高的Na+、Ca 2+、Cl-和SO 42 - 4种离子进行盐结皮试验。试验设置了不同土壤盐分含量和Na 2SO 4、CaCl 2混盐比例的梯度。对盐结皮的物理性质进行了测试，并对盐结皮的抗风蚀性能进行了探讨。结果表明，土壤含盐量和掺盐比例对盐结皮的抗压强度和韧性有显著影响。前者通过改变胶结土盐量来影响盐结皮的抗压强度。后者通过改变离子比例来影响晶体的种类，从而改变盐结皮的结构，影响其抗风蚀能力。盐结皮的抗风蚀性是土壤含盐量和掺盐比相互作用的结果。混合盐可形成多层结皮，具有较强的抗风蚀能力。这一结果为流砂土的研究提供了新的认识，也为流砂土的治理提供了新的方法。
Soil salt crust can change the structure of aeolian soil and improve its resistance to wind erosion. Four ions (Na+, Ca2+, Cl−, and SO42−) with high contents in aeolian soil were selected for a salt crust experiment. The experiment set a variety of gradients of soil salt contents and salt mixing ratios of Na2SO4 and CaCl2. The physical properties of the salt crust were tested, and the wind erosion resistance of the salt crust was discussed. The results showed that the soil salt contents and salt mixing ratio influenced the resistance of the salt crust, especially in terms of its compressive strength and toughness. The former affected the compressive strength of the salt crust by changing the amount of cemented soil salt. The latter affected the kinds of crystals by changing the ion ratio, thus changing the structure of the salt crust and affecting its wind erosion resistance. The wind erosion resistance of the salt crust is complicated by the interaction between the soil salt content and salt mixing ratio. A multilayer crust can be formed in mixed salt, which has a strong wind erosion resistance. This result provides new findings on flowing sand soil and a new method for the treatment of flowing sand soil.
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影响因子：
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