The induced air flotation of aqueous diesel oil emulsions generated during the remediation of contaminated sand has been studied experimentally in a batch flotation column 35 mM in diameter and 300 mM in height. The stability of these emulsions was characterized and factors such as pH and salinity affecting the stability of the emulsion were investigated. The effects of anionic and cationic surfactants, original diesel content, air-flow rate, surfactant dosage, and the air distributor sinter size were investigated, and it was found that up to 99% of the diesel could be removed. This amounted to a residual diesel concentration of less than 10 ppm.