Retention equations of nonionic organic chemicals in soil column chromatography with methanol-water eluents

Journal of Environmental Quality
Feng XuBingcheng Lin


Research efforts dealing with chemical transportation in soils are needed to prevent damage to ground water. Methanol-containing solvents can increase the translocation of nonionic organic chemicals (NOCs). In this study, a general log-linear retention equation, log k' = log k'w - Sphi (Eq. [1]), was developed to describe the mobilities of NOCs in soil column chromatography (SCC). The term phi denotes the volume fraction of methanol in eluent, k' is the capacity factor of a solute at a certain phi value, and log k'w and -S are the intercept and slope of the log k' vs. phi plot. Two reference soils (GSE 17204 and GSE 17205) were used as packing materials, and were eluted by isocratic methanol-water mixtures. A model of linear solvation energy relationships (LSER) was applied to analyze the k' from molecular interactions. The most important factor determining the transportation was found to be the solute hydrophobic partition in soils, and the second-most important factor was the solute hydrogen-bond basicity (hydrogen-bond accepting ability), while the less important factor was the solute dipolarity-polarizability. The solute hydrogen-bond acidity (hydrogen-bond donating ability) was statistically unimportant and deletable. From...Continue Reading


Jun 1, 1995·Bulletin of Environmental Contamination and Toxicology·M E ByersL Jarret
Mar 17, 2000·Journal of Chromatography. a·A Farran, A Chentouf
Nov 13, 1981·Science·D H Freeman, L S Cheung
Apr 1, 1983·Environmental Science & Technology·C T ChiouD W Schmedding

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