Abstract
We evaluated whether ozonation ameliorated the effects of the organic fraction of oil sands process water (OSPW) on immune functions of mice. Ozonation of OSPW eliminated the capacity of its organic fraction to affect various mouse bone marrow-derived macrophage (BMDM) functions in vitro. These included the production of nitric oxide and the expression of inducible nitric oxide synthase, the production of reactive oxygen intermediates and the expression of NADPH oxidase subunits, phagocytosis, and the expression of pro-inflammatory cytokine genes. Ozone treatment also eliminated the ability of OSPW organic fraction to down-regulate the expression of various pro-inflammatory cytokine and chemokine genes in the liver of mice, one week after oral exposure. We conclude that ozone treatment may be a valuable process for the remediation of large volumes of OSPW.
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