防灾减灾工程学报2024，Vol.44Issue(6)：1408-1417,1427,11.DOI:10.13409/j.cnki.jdpme.20230824001
豆皮脲酶诱导碳酸盐沉淀固化砂土抗风蚀性能试验研究
Experimental Study on Wind Erosion Resistance of Sandy Soil Stabilized by Enzyme-Induced Carbonate Precipitation with Urease from Soybean Skin
摘要
Abstract
To control coastal wind erosion and explore feasible and efficient new technologies for coast-al windbreaks and sand fixation,this study developed the Enzyme-Induced Calcium Carbonate Precipi-tation(EICP)sand stabilization technique.The technique used concentrated seawater as a soluble calci-um salt solution and discarded soybean husks as a source of enzyme urease.Wind erosion tests on sta-bilized sand were conducted,and the effects of urease activity,spray volume of the reaction fluid,number of treatments,curing time,and seawater salinity on stabilization efficacy were analyzed.Re-sults indicated that the activity of urease from soybean skin increased with rising temperatures within the range of 10-65°C and also increased with the amount of soybean skin used.Centrifugation time and speed during urease extraction had no significant effect on urease activity.Samples solidified with soy-bean skin and seawater demonstrated effective windbreak and sand fixation.When urease activity was fixed,an increased number of treatments,spray volume,and curing time enhanced surface penetra-tion strength,though the effect gradually diminished beyond a certain threshold.With the same total volume of reaction fluid,multiple incremental treatments resulted in higher carbonate precipitation rates,higher threshold wind velocities,and better wind erosion resistance compared to a single cen-tralized treatment.For optimal wind-erosion resistance,the concentration of concentrated seawater should not be lower than 0.6 mmol/L,and the curing time should not exceed 12 hours.关键词
EICP/豆皮/脲酶/活性/砂土/风蚀Key words
EICP/soybean skin/urease/activity/sandy soil/wind erosion分类
建筑与水利引用本文复制引用
谭慧明,赵祥运,徐烨..豆皮脲酶诱导碳酸盐沉淀固化砂土抗风蚀性能试验研究[J].防灾减灾工程学报,2024,44(6):1408-1417,1427,11.基金项目
国家自然科学基金项目(52078187)资助 （52078187）
