Journal of Environmental Science and Health, Part A: Toxic/Hazardous Substances & Environmental Engineering 2012-01-01

Removal of BPA model compounds and related substances by means of column chromatography using Octolig®.

Rachael J Alessio, Xiao Li, Dean F Martin

Index: J. Environ. Sci. Health. A. Tox. Hazard. Subst. Environ. Eng. 47(14) , 2198-204, (2012)

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Abstract

Octolig®, a polyethylenediimine ligand covalently attached to high-surface area silica gel, was used to study the removal of phenolic compounds from aqueous samples by column chromatography. Model phenolic compounds of Bisphenol A (BPA), 4-isopropylphenol and 4-(t-butyl) phenol, were selected for this study due to their similarities in pKa and log P values. The percent removal of these compounds by Octolig® was 26 ± 2 and 22 ± 2, respectively. Furthermore, the three isomers of nitrophenol were investigated as well as additional phenolic compounds, such as amoxicillin and five phenolic dyes. These compounds have a pKa range of 2-10.2. The compounds that have pKa values less than 8.3 were able to be completely removed by Octolig®, yet compounds with pKa values of 8.3 and higher resulted in approximately 20-26% removal.