18 مرداد 1399
شهريار مهدوي

شهریار مهدوی

مرتبه علمی: دانشیار
نشانی: ملایر- دانشگاه ملایر- دانشکده کشاورزی- گروه علوم ومهندسی خاک
تحصیلات: دکترای تخصصی / خاکشناسی
تلفن: 0812355338
دانشکده: کشاورزی

مشخصات پژوهش

عنوان
Novel impacts of nanoparticles on soil properties: tensile strength of aggregates and compression characteristics of soil
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
agriculture; bulk density; environment; Fe nano-oxide; Mg nano-oxide; nanotechnology; soil physical and mechanical properties
سال
2018
مجله Archives of Agronomy and Soil Science
پژوهشگران شهریار مهدوی

چکیده

Nanoparticles (NPs) affect most soil properties but there have been no assessments of their effects on the compression behavior of soil and the strength of aggregates. Therefore, we assessed the impact of NPs on the bulk density and the confined compression and tensile strength of aggregates of a calcareous loamy soil. Using a factorial design, we assessed the effects of two factors on the soil properties, i.e., NP type (first factor) at two levels comprising Fe nano-oxide (Fe3O4, N1) and Mg nano-oxide (MgO, N2), and treatment amount (second factor) at four levels with dry mass percentages of 0%, 1%, 3%, and 5%. The soil bulk density increased with the Fe level but decreased with the Mg level in ranges of 0.02–0.04 and 0.02–0.08 g cm–3, respectively. The compression curve characteristics were not affected by the NPs. Compared with N1, the N2 treatment significantly increased the soil void ratio by 86% under various stresses. N1 also significantly enhanced the soil tensile strength at suctions of 30, 100, and 1500 kPa, ranging from 0.5 to 15.3 kPa. The 3% Mg and 1% Fe dosages of nano-oxides had the optimal effects, so they should be considered in future investigations.Downloaded by