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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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Enhancing biomineralization process efficiency with trained bacterial strains:A technical perspective

Biogeotechnics

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Biogeotechnics 2023年第2期1卷 73-75页

作者： Chang Zhao vahab toufigh Jinxuan Zhang Yi Liu Wenjun Fan Xiang He Baofeng Cao Yang Xiao School of Civil Engineering Chongqing UniversityChongqing 400045China Department of Civil Engineering Sharif University of TechnologyTehran PO Box 113658639Iran School of Civil and Environmental Engineering Nanyang Technological UniversitySingapore 639798 College of Water Resource and Hydropower Sichuan UniversityChengdu 610065China

Microorganisms have been essential in the natural world for millions of years,contributing significantly to environmental *** has been disoverd that some bacteria are potential in geotechnical and environmental engineering due to their outstanding ability of ***,how to train bacteria as special and professional“workers”for biomineralization is increasingly a key topic in related research *** article briefly introduces the methods that are commonly utilized to improve the environmental adaptability and mineralization efficiency of bacteria,including microbial domestication,microbial mutation breeding,microbial targeted screening,and bio-stimulation,which make great implications to advance the field of biomineralization.

关键词： Biomineralization efficiency Depositional patterns Microbial trainning Bio-stimulation

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