Innovative Techniques for Measuring the Oil Content of Oil‐Contaminated Porous Media

Abstract

The oil content of oil‐contaminated porous media is an important parameter for the assessment and remediation of oil pollution in soil and groundwater. However, an accurate measurement method is not available. In this study, we propose a new equation to calculate the oil content of water‐bearing media based on traditional extraction–ultraviolet spectroscopy. Further, an improved experimental method was developed. The results indicate that the pure solid weight and oil content of oil‐contaminated media can be accurately determined by introducing the oil drying loss coefficient (γ). The average relative errors of the improved method range from −0.14% to −0.96%. They are much smaller than errors of −4.49% to −10.97% of the original methods, indicating that the accuracy of measured oil content is enhanced. In addition, the accuracy of the new method does not depend on oil volatility and oil content.

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

“…All supernatants from the three cycles of extraction were filtered and mixed, and petroleum ether was added to make a final extractant solution of 40 ml. The filtrate was diluted, and the diesel oil concentration in the dilute was determined by absorbance reading in UV spectrophotometer at 225 nm (Lu et al, 2011;Wang et al, 2019a;Zheng et al, 2019). Then the concentration of diesel was determined from the regression equation prepared from calibration of a known concentration and absorbance.…”

Peer Review #1 of "Optimization of aeration enhanced surfactant soil washing for remediation of diesel-contaminated soils using response surface methodology (v0.1)"

“…All supernatants from the three cycles of extraction were filtered and 151 mixed, and petroleum ether was added to make a final extractant solution of 40 ml. The filtrate 152 was diluted, and the diesel oil concentration in the dilute was determined by absorbance reading 153 in UV spectrophotometer at 225 nm (Lu et al 2011;Wang et al 2019a; Zheng et al 2019). Then 154 the concentration of diesel was determined from the regression equation prepared from calibration 155 of a known concentration and absorbance.…”