摘要
裸土扬尘是空气颗粒物污染的重要来源,对人体健康及生态系统造成诸多危害。为了解决裸土扬尘带来的空气污染问题,采用黄原胶联合脲酶诱导碳酸钙沉淀(EICP)技术对裸土扬尘进行固化。通过碳酸钙生成量、抗风蚀性、表面硬度、酸碱度、易溶盐含量等性能试验及微观试验,系统分析对比了黄原胶联合EICP技术固化裸土扬尘效果。结果表明:黄原胶的加入提高了EICP过程中碳酸钙沉淀的生成量;黄原胶掺量为1.0%时,黄原胶联合EICP技术处理后试样的表面硬度值最大;1.0%黄原胶EICP处理的试样风蚀质量损失率为16.60%,较对照组(水)的风蚀质量损失率减小了78.66%;联合处理后裸土的pH值为弱碱性且易溶盐含量较小。黄原胶与EICP技术生成的碳酸钙晶体共同作用,通过胶结颗粒、填充孔隙,增强了试样的整体性,有助于提高试样抗风蚀性。
Bare soil dust is an important source of particulate pollution,which could seriously affect air quality and causes many hazards to human health and ecosystem.In order to solve the air pollution problem caused by bare soil dust,xanthan gum combined with urease-induced calcium carbonate precipitation(EICP)technology was used to solidify bare soil dust.Through the calcium carbonate content,wind erosion resistance test,surface hardness test,acidity and alkalinity test,soluble salts content,and microscopic test,the effect of xanthan gum combined with EICP technology on curing bare soil dust was systematically analyzed and compared.The results showed that:xanthan gum has improved the generation of calcium carbonate precipitation in the EICP process;when the dosage of xanthan gum is 1.0%,the surface hardness value of the specimen treated by xanthan gum combined with EICP technology is the largest;the rate of wind erosion mass loss of the specimen treated by 1.0%xanthan gum EICP is 16.60%,which is 78.66%less than that of the control(water);the pH of the bare soil after the combined treatment is weakly alkaline,and soluble salts content is small;xanthan gum and the calcium carbonate crystals generated by EICP work together to enhance the integrity of the specimen by cementing the particles and filling the pores,helping to improve the specimen's resistance to wind erosion.
作者
刘敏辉
张皓
翟孔康
李璐
LIU Minhui;ZHANG Hao;ZHAI Kongkang;LI Lu(China Jikan Research Institute of Engineering Investigations and Design Co.,Ltd.,Xi′an,Shaanxi 710021,China;Shaanxi Zhongji Geotechnical Engineering Co.,Ltd.,Xi′an,Shaanxi 710048,China;School of Civil Engineering,Chang′an University,Xi′an,Shaanxi 710061,China)
出处
《水利与建筑工程学报》
2025年第4期155-160,共6页
Journal of Water Resources and Architectural Engineering
基金
国机集团机械工业勘察设计研究院科技项目(KYXMN20230018-530324772-F001)
陕西高校青年创新团队项目(2022943)。
关键词
脲酶诱导碳酸钙沉淀
裸土扬尘
木钙
黄原胶
抗风蚀性
urease-induced calcium carbonate precipitation
bare soil dust
Calcium Lignosulfonate
xanthan gum
wind erosion resistance
