Optimization of aeration enhanced surfactant soil washing for remediation of diesel-contaminated soils using response surface methodology.

ABSTRACT: Surfactant-enhanced soil washing has been used for remediation of organic pollutants for an extended period, but its effectiveness and wide application was limited by the high concentration of surfactants utilized. In this work, the efficiency of conventional soil washing performance was enhanced by 12-25% through the incorporation of air bubbles into the low concentration surfactant soil washing system. Surfactant selection pre-experiment using aerated and conventional soil washing reveals Brij 35 > TX100 > Tween 80 > Saponin in diesel oil removal. Optimization of the effect of time, surfactant concentration, pH, agitation speed, and airflow rate in five levels were undertaken using Response Surface Methodology and Central composite design. The optimum degree of variables achieved was 90

SUBMITTER: Ayele BA 

PROVIDER: S-EPMC7024577 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature