Reaction rates of polynuclear aromatic hydrocarbons with ozone in water

Butković, Vjera; Klasinc̆, L.; Orhanovic, M.; Turk, Jasmina.; Guesten, H.

doi:10.1021/es00115a010

Cited by 40 publications

(22 citation statements)

References 7 publications

(14 reference statements)

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“…This is in agreement with what would be expected based on the bond localization energies of PAH, for ozone molecules attack more easily organic compounds having lower bond localization energy. Moreover, our results are similar to those obtained by other authors, who determined that low-molecular weight PAH (3-ring) degraded with ozone slower than higher-molecular weight (4-ring) PAH in aqueous medium (Butković et al, 1983;Trapido et al, 1995). On the other hand, these results are contrary to those of Nam and Kukor (2000), who declared that the reactivity of ozone decreases as the number of fused benzene rings increases.…”

Section: Ozonationsupporting

confidence: 90%

See 1 more Smart Citation

Degradation of polycyclic aromatic hydrocarbons by combined chemical pre-oxidation and bioremediation in creosote contaminated soil

Kulik

Goi

Trapido

et al. 2006

Journal of Environmental Management

181

126

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Section: Ozonationsupporting

confidence: 90%

“…Ozone, which is used both in wastewater and soil treatment, is a very powerful oxidant that can react with PAH with rate constants greater than 10 3 M K1 s K1 (Butković et al, 1983). Ozone oxidizes organic compounds either by direct oxidation or through generation of hydroxyl radicals, or both.…”

Section: Introductionmentioning

confidence: 99%

Degradation of polycyclic aromatic hydrocarbons by combined chemical pre-oxidation and bioremediation in creosote contaminated soil

Kulik

Goi

Trapido

et al. 2006

Journal of Environmental Management

181

126

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“…Trapido et al [35] also observed a dramatic decrease in benzo(a)pyrene's reaction rate when experiments were conducted at concentrations above benzo(a)pyrene aqueous solubility. Butkovic et al [36], also working with benzo(a)pyrene above its aqueous solubility, found that benzo(a)pyrene had lower reactivity toward ozone than pyrene and phenanthrene.…”

Section: Minu Tes Mvoltsmentioning

confidence: 99%

Using slow-release permanganate candles to remediate PAH-contaminated water

Rauscher¹,

Sakulthaew²,

Comfort³

2012

Journal of Hazardous Materials

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Surface waters impacted by urban runoff in metropolitan areas are becoming increasingly contaminated with polycyclic aromatic hydrocarbons (PAHs). Slow-release oxidant candles (paraffin-KMnO(4)) are a relatively new technology being used to treat contaminated groundwater and could potentially be used to treat urban runoff. Given that these candles only release permanganate when submerged, the ephemeral nature of runoff events would influence when the permanganate is released for treating PAHs. Our objective was to determine if slow-release permanganate candles could be used to degrade and mineralize PAHs. Batch experiments quantified PAH degradation rates in the presence of the oxidant candles. Results showed most of the 16 PAHs tested were degraded within 2-4 h. Using (14)C-labled phenanthrene and benzo(a)pyrene, we demonstrated that the wax matrix of the candle initially adsorbs the PAH, but then releases the PAH back into solution as transformed, more water soluble products. While permanganate was unable to mineralize the PAHs (i.e., convert to CO(2)), we found that the permanganate-treated PAHs were much more biodegradable in soil microcosms. To test the concept of using candles to treat PAHs in multiple runoff events, we used a flow-through system where urban runoff water was pumped over a miniature candle in repetitive wet-dry, 24-h cycles. Results showed that the candle was robust in removing PAHs by repeatedly releasing permanganate and degrading the PAHs. These results provide proof-of-concept that permanganate candles could potentially provide a low-cost, low-maintenance approach to remediating PAH-contaminated water.

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“…Once ozone enters into water, it becomes highly unstable and rapidly decomposes through a complex series of reactions [36][37][38][39] . According to the literature 38,39 , ozone decomposition in water can be described as follows:…”

Section: Ozone Technology: Trends and Strategiesmentioning

confidence: 99%

“…Thus, ozone can react in an aqueous medium directly with substrates, such as molecularozone, or indirectly, via radical-intermediates formed during ozone decomposition in aqueous media. Thus, depending on the ozone behaviour in the aqueous medium, the selectivity of ozonation can be high (direct reaction) or low (indirect reaction) 36,37 .…”

Section: Ozone Technology: Trends and Strategiesmentioning

confidence: 99%

Trends and strategies of ozone application in environmental problems

Silva¹,

Jardim²

2006

Quím. Nova

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Recebido em 20/4/05; aceito em 24/6/05; publicado na web em 20/1/06Efforts presented by the scientific community in recent years towards the development of numerous green chemical processes and wastewater treatment technologies are presented and discussed. In the light of these approaches, environmentally friendly technologies, as well as the key role played by the well-known advanced oxidation processes, are discussed, giving special attention to the ones comprising ozone applications. Fundamentals and applied aspects dealing with ozone technology and its application are also presented.

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Reaction rates of polynuclear aromatic hydrocarbons with ozone in water

Cited by 40 publications

References 7 publications

Degradation of polycyclic aromatic hydrocarbons by combined chemical pre-oxidation and bioremediation in creosote contaminated soil

Degradation of polycyclic aromatic hydrocarbons by combined chemical pre-oxidation and bioremediation in creosote contaminated soil

Using slow-release permanganate candles to remediate PAH-contaminated water

Trends and strategies of ozone application in environmental problems

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