کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8893802 | 1629382 | 2019 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Iron and magnesium nano-oxide effects on some physical and mechanical properties of a loamy Hypocalcic Cambisol
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Iron and magnesium nano-oxide effects on some physical and mechanical properties of a loamy Hypocalcic Cambisol Iron and magnesium nano-oxide effects on some physical and mechanical properties of a loamy Hypocalcic Cambisol](/preview/png/8893802.png)
چکیده انگلیسی
Nanoparticle effects on mechanical and physical properties of soil have rarely been investigated, particularly those of iron and magnesium nano-oxides. This study investigated the effects of the application of nano-oxides on total porosity, mean weight diameter (MWD) of aggregates, volumetric water content at a matric potential of â100â¯kPa, penetration resistance, and saturated hydraulic conductivity. Nanoparticle type (two types comprising iron and magnesium nano-oxides), application dosage (four dosages of 0, 1, 3, and 5% by weight), and incubation period (40 and 100â¯days) comprised the factors considered. The magnesium nano-oxide treatments increased (Pâ¯<â¯0.05) total porosity by reducing soil bulk density due to the smaller size of magnesium compared with iron by 0.04â¯cm3â¯cmâ3. After both incubation periods, each application dosage of magnesium nano-oxide increased (Pâ¯<â¯0.05) the MWD of the aggregates, ranging from 0.47 to 2.91, compared with the control and all of the iron nano-oxide dosages because of the large flocculation capacity of magnesium nano-oxide. The 1 and 3% applications of magnesium nano-oxide increased (Pâ¯<â¯0.05) the water content, ranging from 0.01 to 0.02â¯cm3â¯cmâ3 compared with the control and 1 and 3% of the iron nano-oxide dosages, possibly by increasing the specific surface, stabilizing the soil structure, and increasing the microporosity. Penetration resistance increased (Pâ¯<â¯0.05) about 0.14-0.28â¯MPa under the iron nano-oxide treatments whereas penetration resistance decreased (Pâ¯<â¯0.05) about 0.21-0.33â¯MPa under the magnesium nano-oxide treatments. The saturated hydraulic conductivity decreased (Pâ¯<â¯0.05) after both incubation periods with iron (24-61%), and after incubation for 40â¯days with magnesium (38-56%). However, the saturated hydraulic conductivity increased (Pâ¯<â¯0.05) from 46 to 61% after incubation for 100â¯days with magnesium. It was concluded that magnesium nano-oxides can improve selected soil physical and mechanical properties due to their large adhesivity, specific surface, activity, and reaction ability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geoderma - Volume 335, 1 February 2019, Pages 57-68
Journal: Geoderma - Volume 335, 1 February 2019, Pages 57-68
نویسندگان
Hossein Bayat, Zahra Kolahchi, Saeed Valaey, Mostafa Rastgou, Shahriar Mahdavi,