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Biogeotechnics 2024年第3期2卷 50-55页

作者： Erfan Ahmadzadeh Sima Samadianfard Yang Xiao Vahab Toufigh Department of Civil Engineering The Sharif University of TechnologyTehranIran School of Civil Engineering Chongqing UniversityChongqing 400045China

Detrimental impacts of dust caused by mine tailings have yielded to several studies on the efficiency of different soil *** stabilization has been recognized as a reality within recent decades,where bacteria could get adhesion to the grains and stabilize the soil ***,these bacteria are prone to be destroyed while exposed to the normal environmental *** this study,the effects of microcapsules containing two types of bacterial freeze-dried spores(*** Natto LMG 19457 and ***)have been investigated on the mine tailing stability in terms of two *** first part of the study is dedicated to the fabrication of microcapsules within the two bacteria and identification of the characteristics of these microcapsules to set the time of microcapsules break and release in the *** urea-formaldehyde microcapsules containing tung oil were synthesized using microencapsulation method and at the following,the bacterial spores of *** Natto LMG 19457 and *** which had the high durability and the capability to grow in the silicon oil,were added to the *** microcapsules effect on MT specimens and the viability of encapsulated spores were *** characteristics of the capsules were analyzed by scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FTIR)and thermo-gravimetric thermal analysis(TGA).In the second part,wind tunnel tests were conducted to study the effects of microorganism stabilizers on mine *** results indicated that the dust erosion reduced from 16%-using water as a stabilizer-to the 0.2%while using microcapsules containing *** Natto LMG 19457 and 0.8%while using microcapsules containing *** results showed the high efficiency of microcapsules containing bacteria in stabilizing the *** phenomenon was proved by SEM imaging in which the voids were bounded significantly while using the bacteria.

关键词： Urea formaldehyde microencapsulation Dust control stabilization of soil Mine tailings(MTs) Wind tunnel experiment

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