Wind Erosion Resistance of Aeolian Sand Solidified by Animal Bone-derived Extracts Based on Response Surface Methodology
GAO Yuan1,2, WANG Pengwei1,2, REN Guanzhou1,2, FAN Henghui1,2,*, MENG Minqiang1,2, YANG Xiujuan1,2, SUN Zengchun1,2
1 College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China; 2 Institute of Geotechnical Engineering/Museum of Problematic Rock and Soil, Northwest A&F University, Yangling 712100, Shaanxi, China
Abstract: To control the harm of wind erosion in desert areas, abandoned animal bones were used as raw materials to enhance the wind erosion resis-tance of aeolian sand through enzyme induced brushite precipitation(EIBP). This work evaluated the anti-wind erosion performance based on the surface strength of the aeolian sand and the content of precipitation, assessed three key variables affecting the curing effect of EIBP(guar gum ratio, urea concentration, and number of treatments), and optimized them using response surface methodology. Through wind tunnel experiments, the mass loss and morphological characteristics of the sand samples after EIBP curing under different wind speeds and erosion duration were examined. CT three-dimensional reconstruction was used to explore the internal pore distribution characteristics of the sand samples. With the aid of microscopic structural observation and mineral composition analysis, the curing mechanism of EIBP was clarified. The results showed that the two indicators of anti-wind erosion performance initially increase and then decrease with the increase in urea concentration and guar gum ratio, and strengthened with the increase in the number of treatments. The optimal curing effect is achieved when the urea concentration is 0.54 mol/L, the guar gum ratio is 0.3, and the number of treatments is 8, at which point the aeolian sand could resist wind erosion at a speed of 15 m/s. The brushite produced by EIBP played a role in bonding sand particles and filling the pores between particles. The findings provide new insights into the efficient utilization of discarded animal bones and the prevention and control of sand hazards.
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2026, Vol. 40 
