典型文献
Effect of Zn2+-Cu2+combined heavy metal on mechanical properties and microstructure of clayey soil
文献摘要：
The strength deterioration mechanism of soil polluted by heavy metals plays a crucial role in the research of mine site pollution.In this study,an unconfined compressive strength(UCS)test,a pH test,a scanning electron microscopy(SEM)test,a low filed nuclear magnetic resonance(NMR)test,and an X-ray diffraction(XRD)test were conducted on Zn2+,Cu2+and the combination of Zn2+and Cu2+polluted soil to investigate the strength deterioration mechanism.The results show that both the UCS and pH value of soil decrease with increasing heavy metal concentration.The UCS of Zn2+-Cu2+combined polluted soil is between Zn2+and Cu2+polluted soil at the same total concentration.However,the deterioration rate of combined heavy metal polluted soil is less than the sum of deterioration rate of the two single polluted soils at the same total concentration.In addition,heavy metal cations in polluted soil cause flocculent gels of cosmids to shrink,the micropores to become smaller and the macropores to become larger.The porosity increases slightly with the increase of heavy metal concentration due to decreased pH value.The results from SEM,low field NMR,and pH could explain the dynamic evolution process of soil structure with different heavy metals and concentrations,which provides an experimental basis for mine-site polluted heavy metal treatment technology and the prediction of clayey soil strength deterioration.
文献关键词：
中图分类号：
作者姓名：
MA Qiang;WU Nian-ze;XIAO Heng-lin;LI Wen-tao;XIANG Jun-chen
作者机构：
School of Civil Engineering,Architecture and Environment,Hubei University of Technology,Wuhan 430068,China;Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes,Hubei University of Technology,Wuhan 430068,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 10819,China;Science and Technology Innovation Center for Smart Water Conservancy and Resources and Environment,Northeastern University,Shenyang 10819,China
文献出处：
引用格式：
[1]MA Qiang;WU Nian-ze;XIAO Heng-lin;LI Wen-tao;XIANG Jun-chen-.Effect of Zn2+-Cu2+combined heavy metal on mechanical properties and microstructure of clayey soil)[J].山地科学学报（英文版）,2022(09):2556-2569
A类：
Cu2+combined,Cu2+polluted,flocculent,cosmids
B类：
Effect,heavy,mechanical,properties,microstructure,clayey,strength,deterioration,mechanism,by,metals,plays,crucial,role,research,mine,site,pollution,In,this,study,unconfined,compressive,UCS,test,scanning,electron,microscopy,low,filed,nuclear,magnetic,resonance,NMR,ray,diffraction,were,conducted,Cu2+and,combination,Zn2+and,investigate,results,show,that,both,value,increasing,between,same,total,However,rate,less,than,sum,two,single,soils,addition,cations,cause,gels,shrink,micropores,become,smaller,macropores,larger,porosity,increases,slightly,due,decreased,from,field,could,explain,dynamic,evolution,process,different,concentrations,which,provides,experimental,basis,treatment,technology,prediction
AB值：
0.439483
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