摘要
为探究MICP技术与超旱生植物联合进行防风固沙的可行性,基于MICP技术对流沙进行处理,选择霸王、无芒隐子草和白沙蒿3种超旱生植物进行室内盆栽试验,研究了菌液浓度和胶结液浓度对植物出苗率的影响,并采用室内风沙侵蚀系统对MICP技术处理的试件进行吹蚀试验,研究了其抗风蚀性能。结果显示:MICP技术联合超旱生植物进行防风固沙在技术上是可行的,微生物诱导碳酸钙沉淀的最佳菌液OD_(600)值为0.8、胶结液浓度为0.10 mol/L,以此配比对流沙进行处理后矿化覆膜生成情况最优、旱生植物出苗率最高;3种超旱生植物出苗率顺序为白沙蒿>霸王>无芒隐子草;矿化覆膜具有良好的抗风蚀性能,菌液和胶结液混合液按喷洒量为0.5~0.7 mL/cm^(2)处理的试件经12 m/s风速吹蚀10 min后,质量损失率比对照试件降低50~64个百分点,喷洒量为0.7 mL/cm^(2)的试件抗风蚀性能最好。
In order to explore the feasibility of combining MICP technology with super-xerophyte for wind prevention and sand fixation,MICP technology was used to treat the quicksand,and three super-xerophytes,including Zygophyllum xanthoxylum,Cleistogenes songorica and Artemisia sphaerocephala,were selected for indoor pot experiment.The effects of the concentration of bacteria and cementing fluid on the plant emergence rate were studied.The wind erosion test of MICP-treated specimens was carried out by indoor wind erosion system,and the wind erosion resistance of bio-mineralized crust specimens was studied.The results show that MICP technology combined with super-xerophyte for windbreak and sand fixation is technically feasible.The optimal OD_(600) value of microbial induced calcium carbonate precipitation is 0.8,and the concentration of cement solution is 0.10 mol/L.After the treatment of quicksand,the formation of mineralization and the emergence rate of xerophytes are the best.The order of emergence rate of three kinds of super-xerophytes is Artemisia sphaerocephala>Zygophyllum xanthoxylum>Cleistogenes songorica.The bio-mineralized crust has good wind erosion resistance.After the specimens treated with the mixture of bacterial solution and cementing solution at the spraying rate of 0.5-0.7 mL/cm^(2) are blown at 12 m/s wind speed for 10 min,the mass loss rate is 50-64 percentage points lower than that of the control specimen.The specimen with the spraying rate of 0.7 mL/cm^(2) has the best wind erosion resistance.
作者
赵志杰
李驰
高瑜
张振国
张永锋
ZHAO Zhijie;LI Chi;GAO Yu;ZHANG Zhenguo;ZHANG Yongfeng(School of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Inner Mongolia Engineering Research Center of Geological Technology and Geotechnical Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Key Lab of University of Geological Hazards and Geotechnical Engineering Defense in Sandy,Drought and Cold Regions,Inner Mongolia Autonomous Region,Hohhot 010051,China;School of Chemical Engineering,Inner Mongolia University of Technology,Hohhot 010051,China)
出处
《人民黄河》
CAS
北大核心
2022年第8期119-122,127,共5页
Yellow River
基金
内蒙古自治区关键技术攻关计划项目(2021GG0344)
内蒙古自治区科技重大专项(2020ZD0021)。
关键词
MICP
超旱生植物
防风固沙
盆栽试验
吹蚀试验
MICP
super-xerophyte
windbreak and sand fixation
pot experiment
blowing erosion experiment
