Dust emission and wind erosion are widespread phenomena in arid and semi-arid regions, which have far-reaching harmful effects to the environment. This study aimed to use microbial induced carbonate precipitation (MICP) method with Bacillus sphaericus to reduce soil losses that occur in a dust-producing area due to wind erosion in the Ilam Province, Iran. Soil samples at the 0–30 cm depth were used and sterilized in an autoclave for 2 h at 121°C and 103 kPa. Approximately 3 kg soils were weighed and poured in the 35 cm×35 cm×3 cm trays. Different treatments included two levels of B. sphaericus (0.0 and 0.5 OD), three levels of suspension volume (123, 264, and 369 mL), two levels of urea-chloride cementation solution (0.0 and 0.5 M), and two levels of bacterial spray (once and twice spray). After 28 d, soil properties such as soil mass loss, penetration resistance, and aggregate stability were measured. The results showed a low soil mass loss (1 g) in F14 formulation (twice bacterial spray+264 mL suspension volume+without cementation solution) and a high soil mass loss (246 g) in F5 formulation (without bacteria+264 mL suspension volume+0.5 M cementation solution). The highest (42.55％) and the lowest (19.47％) aggregate stabilities were observed in F16 and F7 formulations, respectively, and the highest penetration resistance (3.328 kg/cm2) was observed in F18 formulation. According to the final results, we recommended the formulation with twice bacterial spray, 0.5 M cementation solution, and 269 mL suspension volume as the best combination for soil surface stabilization. Furthermore, this method is environmentally friendly because it has no adverse effects on soil, water, and plants, thus, it would be an efficient approach to stabilize soil surface.

Davood NAMDAR-KHOJASTEH;Masoud BAZGIR;Seyed Abdollah HASHEMI BABAHEIDARI;Akwasi B ASUMADU-SAKYI

Department of Soil Science,Faculty of Agriculture,Shahed University,Tehran 3319118651,Iran;Department of Soil and Water Engineering,Faculty of Agriculture,Ilam University,Ilam 6931863949,Iran;Department of Plant Protection,Faculty of Agriculture,Shahed University,Tehran 3319118651,Iran;International Laboratory for Air Quality and Health,School of Chemistry,Physics and Mechanical Engineering,Queensland University of Technology,Brisbane,Queensland 4000,Australia

干旱区科学

[1]Davood NAMDAR-KHOJASTEH;Masoud BAZGIR;Seyed Abdollah HASHEMI BABAHEIDARI;Akwasi B ASUMADU-SAKYI-.Application of biocementation technique using Bacillus sphaericus for stabilization of soil surface and dust storm control)[J].干旱区科学,2022(05):537-549

biocementation,Ilam,spray+264,volume+without,bacteria+264,volume+0

Application,technique,using,Bacillus,sphaericus,stabilization,surface,dust,storm,control,Dust,emission,wind,erosion,widespread,phenomena,arid,semi,regions,which,have,far,reaching,harmful,effects,This,study,aimed,microbial,induced,carbonate,precipitation,MICP,method,reduce,losses,that,occur,producing,area,due,Province,Iran,Soil,samples,depth,were,used,sterilized,autoclave,kPa,Approximately,soils,weighed,poured,trays,Different,treatments,included,two,levels,OD,three,suspension,urea,chloride,solution,bacterial,once,twice,After,properties,such,mass,penetration,resistance,aggregate,stability,measured,results,showed,F14,F5,highest,lowest,stabilities,observed,F16,F7,formulations,respectively,was,F18,According,final,recommended,best,combination,Furthermore,this,environmentally,friendly,because,has,adverse,water,plants,thus,would,efficient,approach,stabilize

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