Dissolution of resin acids, retene and wood sterols from contaminated lake sediments

Chemosphere
Päivi MeriläinenAimo Oikari

Abstract

The dissolution potency of hydrophobic resin acids (RAs), retene and wood sterols from sediments was studied. These wood extractives and their metabolites are sorbed from pulp and paper mill effluents to downstream sediments. With harmful components like these, sediments can pose a hazard to the aquatic environment. Therefore, sediment elutriates with water were produced under variable conditions (agitation rate and efficiency, time), and concentrations of the dissoluted compounds were analyzed. Both naturally contaminated field sediments and artificially spiked sediments were studied. By vigorous agitation RAs can be released fast from the sediment matrix and equilibrium reached within 3 days. Compared to RAs, desorption of retene from lake sediment was slower and did not completely reach equilibrium in 23 days. Sterols spiked to pristine sediment with a 33-day contact time desorbed faster than those associated authentically with industrial sediment of from a contaminated lake. Simulating the water turbulence adjacent to a sediment surface by low and high rate of agitation in the laboratory, an increase in the mixing rate after 43-day elutriation suddenly released a high amount of wood sterols. The results indicate wide variat...Continue Reading

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Citations

Jan 27, 2010·Environmental Science and Pollution Research International·Teresa Rocha-SantosArmando Costa Duarte
Dec 25, 2012·Environmental Science and Pollution Research International·H RatiaA Oikari
Aug 7, 2012·Bulletin of Environmental Contamination and Toxicology·Kati RäsänenAimo Oikari
Sep 23, 2008·Chemosphere·Sandra I M CarvalhoEduarda B H Santos
Jun 10, 2017·Journal of Toxicology and Environmental Health. Part a·Sailendra Nath SarmaHing Man Chan

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