Review on remediation of contaminated soil by electrokinetic method coupled with permeable reactive barrier
In recent years,with the increasingly rapid development of urbanization and industrialization,soil pollution caused by human activities has seriously endangered the environment and the health of living beings.Therefore,the remediation technology suitable for contaminated soil has received extensive attention.Electrokinetic remediation technology has the advantages of short time,low cost,high efficiency,wide treatment object,and no damage to soil structure,which is considered to be a promising in-situ soil remediation technology.Electrokinetic remediation technology is generally combined with other technologies to improve the removal efficiency of pollutants in soil.Permeable reaction barrier(PRB)technology can remove pollutants in soil and groundwater utilizing adsorption,precipitation,redox reaction,biodegradation reaction between active substances and pollutants,and so on.The electrokinetic method coupled with permeable reaction barrier(EK-PRB)remediation technology combines the advantages of the two remediation methods which can remediate contaminated soil more efficiently.In this review,the principles of electrokinetic remediation technology,permeable reaction barrier technology,and their combination technology in the remediation of contaminated soil are described,then the various influencing factors in the remediating process and the improving methods are analyzed.The remediation modes,applications,and practices of EK-PRB technology in soils contaminated by inorganic matters(i.e.,heavy metals,inorganic salts,and radioactive elements)and in soils contaminated by organic matters(i.e.,phenanthrene,ether,and diesel)in recent years are also carefully reviewed.On top of that,the development status ofEK-PRB technology is summarized.At present,the innovation and modification of PRB materials and the improvement of electrolyte solutions are mainly focused fields to enhance the remediating efficiency of EK-PRB technology.In the end,the disadvantages of EK-PRB technology are listed,and the development trend of EK-PRB technology applied to contaminated sites in the future is also put forward.
NETL
NSTL
万方数据
维普
