title: [Effect of different soil types on the remediation of copper-pyrene compound contaminated soils by EK-oxidation process].
abstract: The effect of different soil types (red soil,yellow-brown soil and black soil) on the electrokinetic (EK)-oxidation remediation of heavy metals-organic pollutant contaminated soil was studied in laboratory-scale experiments. Copper and pyrene were chosen as model pollutant, and 12% H2O2, 10% hydroxypropyl-beta-cyclodextrin and 0.01 mol x L(-1) NaNO3 solution were added into the anode and cathode cell. The applied voltage was 1 V x cm(-1). After 15 days of EK remediation, the removal rate of pyrene and copper in red soil, yellow-brown soil and black soil were 38.5%, 46.8%, 51.3% for pyrene and 85.0%, 22.6%, 24.1% for Cu, respectively. The high pH of black soil produced high electroosmotic flow and increased the exposure of oxidants and pollutants, meanwhile the low clay content was also conducive to the desorption of pyrene. The low pH and organic matter of red soil affected the chemical species distribution of Cu and increased its removal rate. It is concluded that soil pH, clay content and heavy metal speciation in soil are the dominant factors affecting the migration and removal efficiency of pollutants.
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China. north031404306@163.com
authors.forename: Guang-Ping
authors.initials: GP
authors.lastname: Fan
authors.forename: Long
authors.initials: L
authors.lastname: Cang
authors.forename: Dong-Mei
authors.initials: DM
authors.lastname: Zhou
authors.forename: Li-Xiang
authors.initials: LX
authors.lastname: Zhou
mesh_terms: D003300:Copper / Q000737:chemistry* / Q000302:isolation & purification; D055664:Electrochemical Techniques / Q000379:methods*; D004784:Environmental Monitoring; D052918:Environmental Restoration and Remediation / Q000379:methods*; D010084:Oxidation-Reduction; D011721:Pyrenes / Q000737:chemistry* / Q000302:isolation & purification; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D011721:Pyrenes; D012987:Soil; D012989:Soil Pollutants; D003300:Copper; C030984:pyrene