Influence of pyrene combination state in soils on its treatment efficiency by Fenton oxidation

Journal of Environmental Management
Hong-Wen Sun, Qi-She Yan

Abstract

Interactions of hydrophobic organic compounds (HOCs) with soil organic matter (SOM) determine their combination state in soils, and therefore strongly influence their mobility, bioavailability, and chemical reactivity. Contact time (aging) of an HOC in soil also strongly influences its combination state and environmental fate. We studied Fenton oxidation of pyrene in three different soils to reveal the influences of SOM, contact time, and combination state on the efficiency of vigorous chemical reactions. Pyrene degradation efficiency depended strongly on the dose of oxidant (H(2)O(2)) and catalyst (Fe(2+)); the greatest degradation was achieved at an oxidant to catalyst molar ratio of 10:1. Pyrene degradation differed among the three soils, ranging from 65.4% to 88.9%. Pyrene degradation efficiency decreased with increasing SOM content, and the aromatic carbon content in SOM was the key parameter. We hypothesize that pyrene molecules that combine with the compact net structure of aromatic SOM are less accessible to Fenton oxidation. Furthermore, pyrene degradation efficiency decreased considerably after aged for 30 days, but further aging to 60 and 180 days did not significantly change degradation efficiency. The Fenton oxidat...Continue Reading

References

Aug 26, 2003·Journal of Hazardous Materials·Nora San Sebastián MartínezAntoni Sánchez Ferrer
Aug 26, 2004·Environmental Pollution·A WalkerM J Mitchell
Jan 26, 2005·Environmental Science & Technology·Seunghun Kang, Baoshan Xing
Jun 29, 2005·Chemosphere·Denis Brion, Emilien Pelletier
Nov 1, 2005·Chemosphere·Namgoo Kang, Inez Hua
Nov 23, 2006·Journal of Hazardous Materials·Hong-Wen Sun, Qi-She Yan
May 1, 1994·Environmental Science & Technology·A T KanM B Tomson

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Citations

Feb 7, 2014·Journal of Environmental Health Science & Engineering·Sahand JorfiNemat Alah Jaafarzadeh
Oct 7, 2015·Environmental Science and Pollution Research International·Xinhao RenHongwen Sun
Jan 8, 2021·Environmental Geochemistry and Health·Mahmoud MazarjiTamara Dudnikova
Aug 9, 2020·Journal of Hazardous Materials·I BouzidN Fatin-Rouge

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