Ex situ soil remediation by cold atmospheric plasma discharge
The goal of the present work is to examine the efficiency of cold dielectric barrier discharge (DBD) plasma as a method for the remediation of soils contaminated by non-aqueous phase liquids (NAPLs) by using an experimental setup that can easily be up-sealed to industrial scale and a model NAPL (mixture ofn-C10,n-C12 and n-C16).The effect of several parameters such as soil heterogeneity,NAPL concentration and treatment time on soil remediation efficiency was investigated by treating NAPL-contaminated samples of a homogeneous commercial silicate sand and a moderately heterogeneous loamy sandy soil with ex situ DBD plasma at atmospheric pressure.The energy density varied from 675 to 10125 J/g-soil for three NAPL concentrations (1 g/kg-soil,10 g/kg-soil,100 g/kg-soil).The concentration and composition of the residual NAPL in soil were determined with extraction in dichloromethane (DCM)and GC-FID analysis.The experimental results revealed that:(i) the NAPL removal efficiency increases rapidly in early times reaching a plateau at late times,where NAPL is removed almost completely (97 to 99.7%); (ii) the soil heterogeneity decreases the rate of NAPL removal efficiency,especially at lower NAPL concentrations; (iii) the rate of NAPL removal efficiency decreases with its concentration increasing.
Soil remediation DBD plasma NAPL oxidation Soil heterogeneity
C.A.Aggelopoulos C.D.Tsakiroglou S.Ognier S.Cavadias
Foundation for Research and Technology Hellas-Institute of Chemical Engineering Sciences, Stadiou st Foundation for Research and Technology Hellas-Institute of Chemical Engineering Sciences, Stadiou st Laboratoire de Génie des Procédés Plasmas et Traitements de Surfaces-EA 3492, Université Pierre et M
国际会议
2013 International Symposium on Environmental Science and Technology(2013环境科学与技术国际会议)
大连
英文
528-532
2013-06-04（万方平台首次上网日期，不代表论文的发表时间）