Integrated Chemical-Biological Treatment of Benzo[a]pyrene

Zeng, Y.; Hong, P. K. Andrew; Wavrek, David A.

doi:10.1021/es002016v

Cited by 51 publications

(28 citation statements)

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“…Polycyclic aromatic hydrocarbons (PAHs) constitute a group of hydrophobic organic compounds (HOCs) [1], which are related to the incomplete oxidation and combustion [2] and also to the uncontrolled environmental pollution practically present everywhere. The PAHs structures differ in the number and placement of aromatic rings and their physicochemical properties can vary widely [3].…”

Section: Introductionmentioning

confidence: 99%

“…The studies of the integrated ozonation-biological treatment for different PAHs have shown that ozonation improved the bioavailability and biodegradability of the contaminants rendering PAHs more soluble and thus biologically accessible [1,[26][27][28]. At higher ozone dozes, biodegradable compounds, both initially present and formed as a result of ozonation, compete for the available ozone [22,[29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

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Integrated treatment of PAH contaminated soil by soil washing, ozonation and biological treatment

Haapea

Tuhkanen

2006

Journal of Hazardous Materials

106

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Integrated treatment of PAH contaminated soil by soil washing, ozonation and biological treatment

Haapea

Tuhkanen

2006

Journal of Hazardous Materials

106

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“…Significant researches have been performed to examine the biodegradation of different PAHs [8] and the relationships between PAHs desorption, dissolution and bioavailability [9] . It has been shown that the biodegradation of PAHs is inversely proportional to the number of rings, so the low molecular weight PAHs are biologically degradable to a large extent [10] , while for highly condensed PAHs above four rings, a complete transformation or degradation has not been proven by far for they cannot be used as the sole carbon and energy source in microbial metabolism [11] . In a word, the efficiency of bioremediation depends on environmental conditions and in general the process is slow.…”

Section: Introductionmentioning

confidence: 99%

Degradation of anthracene, pyrene and benzo[a]-anthracene in aqueous solution by chlorine dioxide

Liu

Huang

et al. 2006

SCI CHINA SER B

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Polycyclic aromatic hydrocarbons (PAHs) constitute an important group of micropollutants, which are known to be mutagenic, carcinogenic and/or co-carcinogenic and relatively persistent in the environment. The effects of chlorine dioxide (ClO 2 ) on the degradation of anthracene (ANTH), pyrene (PYR) and benzo[a]anthracene (BaA) in aqueous solution were investigated using high performance liquid chromatography (HPLC). In preliminary experiments, it was observed that ClO 2 could remove these three PAHs effectively within a short time. Several factors including reaction time, the concentration of ClO 2 and pH of the reaction mixture influencing the degradation ratio of PAHs have been studied by batch experiments. The results showed that the degradation ratio of PAHs was affected by reaction time and the concentration of ClO 2 instead of pH. The degradation ratio of ANTH, PYR and BaA could reach their maximum as approximately 99.0%, 67.5% and 89.5%, respectively, under the condition as follows: reaction time 30, 60 and 120 min, the concentration of ClO 2 0.1, 0.4 and 0.5 mmol·L −1 , and pH 7.2. ANTH was selected as the representative to study the reaction mechanism with ClO 2 . The oxidation products formed in the reaction of ANTH with ClO 2 were tentatively identified by gas chromatography-mass spectrometry (GC-MS), and the results showed that the main product was 9, 10-anthraquinone, which could be biodegraded more easily and quickly than ANTH. Through analyzing the reaction properties of ANTH and ClO 2 , the possible pathway for the ANTH-ClO 2 reaction was proposed based on the theory of single electron transfer (SET).

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“…Tel. : +886 6 366 3855; fax: +886 6 266 9090. pretreatment and biodegradation as a follow-up treatment has become a promising cost-effective option in water purification [6][7][8]. Consequently, insight into the distribution of degradation byproducts in ozonation will help optimize the subsequent biological unit via providing information on the composition of feed constituents.…”

Section: Introductionmentioning

confidence: 99%