Surfactant combined with PASP enhance electrokinetic remediation removal heavy metal and hydrocarbon from contaminated soil

In this work, a new electrokinetic remediation technology was used to remove heavy metal and hydrocarbon from contaminated soil. The surfactant combined with PASP (Polyaspartic acid) enhance removing Electric current, soil pH, electroosmotic flow, water content variation, removal efficiency residual distribution, speciation, of TPH (total petroleum hydrocarbons), group composition oil, mechanism were investigated during the process. Results indicated that Rhamnolipid, PASP, Tween 80 SDS (sodium dodecyl sulphate) can reduce precipitation Also, it promote EOF (electroosmotic flow) electrolyte evaporation EK remediation. rhamnolipid (3.0 g.L−1) significantly improve Cu, Cr, Ni, Pb mobility solubility remediations. Ni obtained dominant efficiencies, which 66.0 ± 3.45%, 61.2 4.35%, 67.1 3.21%, 61.8 4.22%, respectively. has attained 80.2 4.36% after enhanced This research provides novel in-situ approach for reducing metals in an environmentally friendly way.