Groundwater Contamination by Detergents and Polycyclic Aromatic Hydrocarbons – A Global Problem of Organic Contaminants: Is the Solution Locally Specific?

1993 ◽  
Vol 27 (7-8) ◽  
pp. 187-194 ◽  
Author(s):  
Uri Zoller
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Groundwater Pollution ◽  
Organic Contaminants ◽  
Anthropogenic Sources ◽  
Health Concern ◽  
Base Line ◽  
Political Issues ◽  
Global Problem ◽  
Polycyclic Aromatic

The ever-increasing demand of our technological society has generated a global problem of groundwater pollution by man-made products and/or their metabolites. The penetration of detergents and polycyclic aromatic hydrocarbons (PAH) originating from anthropogenic sources constitutes a major issue of environmental and health concern. In Israel, the concentrations of nonbiodegradable nonionic detergents in sewage influents, effluents, and water wells were found to be in the range of 1-2.60, 0.25-0-50 and 0.12-0.78 mg/liter respectively. These results translate the global problem of groundwater pollution into the local problem of groundwater contaminated by synthetic detergents with all the environmental, health, societal, technological, economic and political issues involved. The respective base-line data concerning PAHs is not available as yet. Although some of the solutions are locally specific they cannot be applied independently of what is being done in this respect worldwide. The long-term solution requires international cooperation and collaboration.

Transformation of chrysene and other polycyclic aromatic hydrocarbon mixtures by the fungus Cunninghamella elegans

1995 ◽  
Vol 73 (S1) ◽  
pp. 1025-1033 ◽  
Author(s):  
Jairaj V. Pothuluri ◽  
Allison Selby ◽  
Frederick E. Evans ◽  
James P. Freeman ◽  
Carl E. Cerniglia
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbons ◽  
High Performance ◽  
Parent Compound ◽  
Environmental Pollutants ◽  
Health Concern ◽  
Cunninghamella Elegans ◽  
C Elegans ◽  
Polycyclic Aromatic

Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous and persistent environmental pollutants; some are mutagenic, toxic, and carcinogenic and remain a public health concern. We investigated the metabolism of mixtures of PAHs and a tetracyclic aromatic hydrocarbon, chrysene, by the filamentous fungus, Cunninghamella elegans ATCC 36112. Cunninghamella elegans metabolized a mixture of PAHs including the carcinogen benzo[a]pyrene, phenanthrene, fluoranthene, pyrene, and acenaphthene completely to hydroxylated intermediates within 24 h. The metabolites from the PAH mixtures were similar to those formed in earlier studies of individual PAH compounds. In separate experiments with chrysene, C. elegans metabolized about 45% of the [5,6,11,12-14C]chrysene added to cultures during 144 h incubation. The two major metabolites of chrysene were separated by reverse-phase high performance liquid chromatography and identified by ultraviolet–visible, mass spectral, and 1H-nuclear magnetic resonance techniques as sulfate conjugates of 2,8-dihydroxychrysene and 2-hydroxychrysene. The two major metabolites accounted for about 33% of the total metabolism. The formation of sulfate conjugates of phenolic chrysene metabolites and glucoside conjugates and hydroxylated products of PAH mixtures by C. elegans may be a detoxification step, because these types of products are generally less toxic than the parent compound. Key words: polycyclic aromatic hydrocarbons, PAH mixtures, chrysene, Cunninghamella elegans, biotransformation, oxidation.

scholarly journals Phytomediated Biostimulation of the Autochthonous Bacterial Community for the Acceleration of the Depletion of Polycyclic Aromatic Hydrocarbons in Contaminated Sediments

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Simona Di Gregorio ◽  
Alessandro Gentini ◽  
Giovanna Siracusa ◽  
Simone Becarelli ◽  
Hassan Azaizeh ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Phragmites Australis ◽  
Aromatic Hydrocarbons ◽  
Organic Contaminants ◽  
Dry Weight ◽  
Quantitative Real Time Pcr ◽  
Gram Positive ◽  
Gram Negative ◽  
Dredged Sediments ◽  
Polycyclic Aromatic

Polycyclic aromatic hydrocarbons (PAHs) are a large group of organic contaminants causing hazards to organisms including humans. The objective of the study was to validate the vegetation of dredged sediments withPhragmites australisas an exploitable biostimulation approach to accelerate the depletion of PAHs in nitrogen spiked sediments. Vegetation withPhragmites australisresulted in being an efficient biostimulation approach for the depletion of an aged PAHs contamination (229.67±15.56 μg PAHs/g dry weight of sediment) in dredged sediments.Phragmites australisaccelerated the oxidation of the PAHs by rhizodegradation. The phytobased approach resulted in 58.47% of PAHs depletion. The effects of the treatment have been analyzed in terms of both contaminant depletion and changes in relative abundance of the metabolically active Gram positive and Gram negative PAHs degraders. The metabolically active degraders were quantified both in the sediments and in the root endospheric microbial community. Quantitative real-time PCR reactions have been performed on the retrotranscribed transcripts encoding the Gram positive and Gram negative largeαsubunit (RHDα) of the aromatic ring hydroxylating dioxygenases. The Gram positive degraders resulted in being selectively favored by vegetation withPhragmites australisand mandatory for the depletion of the six ring condensed indeno[1,2,3-cd]pyrene and benzo[g,h,i]perylene.

scholarly journals The use of polycyclic aromatic hydrocarbons molecular diagnostic ratios as a source identification tool - case study

2018 ◽  
Vol 247 ◽  
pp. 00062
Author(s):  
Katarzyna Janoszka ◽  
Justyna Klyta ◽  
Łukasz Laks ◽  
Krzysztof Słaby
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Source Identification ◽  
Anthropogenic Sources ◽  
Rural Site ◽  
Molecular Diagnostic ◽  
Diagnostic Ratios ◽  
Polycyclic Aromatic ◽  
Combustion Processes

Levoglucosan (LG) and Polycyclic Aromatic Hydrocarbons (PAHs) are organic substances emitted from variety of anthropogenic sources, mainly as a result of incomplete combustion or pyrolysis of organic material. The seasonality of PAHs emissions is a well demonstrated fact, observed in most monitoring studies, where PAHs air concentrations in winter are much higher than their respective in the summer, due to seasonally variable emission sources. Various techniques have been proposed as ideal source identification (or apportionment) tools, and much debate exists in scientific literature about the effectiveness of the proposed methodologies. The most common methodology is the use of molecular diagnostic ratios (MDRs). Based on the annual measurement campaign in rural site located on South Poland, were levoglucose and PAHs were analyzed, the MDRs were determined. The results showed that the combustion processes of solid fuels, including biomass, are mainly responsible for air quality.

scholarly journals Detection of Polycyclic Aromatic Hydrocarbons in Hide and Skin of Slaughtered Cattle and Goats in Anambra State, Nigeria

2020 ◽  
Author(s):  
I.B. Ofomata ◽  
I.O. Nwankwo ◽  
A.J. Ogugua ◽  
E.V. Ezenduka ◽  
J.A. Nwanta ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Health Concern ◽  
Cumulative Exposure ◽  
Maximum Permissible Level ◽  
Anambra State ◽  
Total Pahs ◽  
Dietary Consumption ◽  
Polycyclic Aromatic ◽  
Materials Used

Background: Polycyclic Aromatic Hydrocarbons (PAHs) are among hazardous chemicals that may endanger food safety. In Nigeria, hides and skins of animals are edible and used in dishes. So, this study investigated the levels of PAHs in singed and unsinged hides and skins of animals slaughtered at three districts abattoirs (Obosi, Uga, and Kwata) in Anambra State, Nigeria. Methods: Using gas chromatography, the levels of PAHs were determined in 120  samples of raw and singed cattle hides and goat skins. Data were analyzed using the SPSS Windows software package (version 20.0). Results: The total PAHs of raw and singed cattle hides were respectively 0.80 and 12.33 µg/kg for Obosi district, 0.56 and 6.96 µg/kg for Uga district, and 8.30 and 16.24 µg/kg for Kwata district. Furthermore, the total PAHs levels in raw and singed goat skins were respectively 2.75 and 9.00 µg/kg for Obosi district, 1.76 and 6.42 µg/kg for Uga district, and 1.30 and 5.19 µg/kg for Kwata district. The levels of some PAHs in singed hides and skins were significantly (p<0.05) higher than the unsinged samples. Conclusion: The materials used in singeing may increase the concentration of PAHs in singed hide and skin. Although, the known carcinogenic PAHs in the samples were below the maximum permissible level, it is probably of public health concern due to the associated health risk on cumulative exposure via the dietary consumption of such contaminated local meals. 

scholarly journals The Carcinogenic Properties of Overlooked yet Prevalent Polycyclic Aromatic Hydrocarbons in Human Lung Epithelial Cells

Toxics ◽  
2022 ◽  
Vol 10 (1) ◽  
pp. 28
Author(s):  
Alison K. Bauer ◽  
Katelyn J. Siegrist ◽  
Melanie Wolff ◽  
Lindsey Nield ◽  
Thomas Brüning ◽  
...  
Keyword(s):  
Cell Cycle ◽  
Air Pollution ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Binary Mixture ◽  
Aromatic Hydrocarbons ◽  
Human Lung ◽  
Health Concern ◽  
Human Lung Cells ◽  
Lung Epithelial ◽  
Polycyclic Aromatic

The WHO classified air pollution as a human lung carcinogen and polycyclic aromatic hydrocarbons (PAHs) are components of both indoor (e.g., tobacco smoke and cookstoves) and outdoor (e.g., wildfires and industrial and vehicle emissions) air pollution, thus a human health concern. However, few studies have evaluated the adverse effects of low molecular weight (LMW) PAHs, the most abundant PAHs in the environment. We hypothesized that LMW PAHs combined with the carcinogenic PAH benzo[a]pyrene (B[a]P) act as co-carcinogens in human lung epithelial cell lines (BEAS-2B and A549). Therefore, in this paper, we evaluate several endpoints, such as micronuclei, gap junctional intercellular communication (GJIC) activity, cell cycle analysis, anti-BPDE-DNA adduct formation, and cytotoxicity after mixed exposures of LMW PAHs with B[a]P. The individual PAH doses used for each endpoint did not elicit cytotoxicity nor cell death and were relevant to human exposures. The addition of a binary mixture of LMW PAHs (fluoranthene and 1-methylanthracene) to B[a]P treated cells resulted in significant increases in micronuclei formation, dysregulation of GJIC, and changes in cell cycle as compared to cells treated with either B[a]P or the binary mixture alone. In addition, anti-BPDE-DNA adducts were significantly increased in human lung cells treated with B[a]P combined with the binary mixture of LMW PAHs as compared to cells treated with B[a]P alone, further supporting the increased co-carcinogenic potential by LMW PAHs. Collectively, these novel studies using LMW PAHs provide evidence of adverse pulmonary effects that should warrant further investigation.

scholarly journals Estimation of the dietary exposure of polycyclic aromatic hydrocarbons in Syria and their health risks assessment

2020 ◽  
Vol 9 (2) ◽  
pp. 332-345
Author(s):  
Hour Krajian
Keyword(s):  
Risk Assessment ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Health Risk ◽  
Health Risk Assessment ◽  
Aromatic Hydrocarbons ◽  
Dietary Exposure ◽  
Health Concern ◽  
Polycyclic Aromatic ◽  
Urban Rural ◽  
General Populations

In this work, the exposure of people, through their diet, to polycyclic aromatic hydrocarbons (PAHs) has been assessed for the urban, rural, and general populations in Syria. The food categories consumed have been divided into major groups, and the health risk assessment on dietary exposure of PAHs determined in each food category. For this purpose, two approaches were used: incremental lifetime cancer risk (ILCR) and margin of exposure approach (MOE). The results showed that each of the following food categories: oils and fats, meat and meat products, vegetables, and cereals dominantly contribute in the dietary exposure of PAHs. Also their MOE values are the lowest. Additionally, they have higher ILCR values. Therefore, these groups are a main risk source to health. On the other hand, the dietary exposure of PAHs in each of urban, rural and general populations was of low health concern, whereas their ILCR values reached to 10E-05 in total food categories, nevertheless it remains lower than serious risk level (ILCR>10E-04). This work is the first study that is dealing with dietary exposure of PAHs and their health risk assessment in Syria.

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