scholarly journals Treatment of Polycyclic Aromatic Hydrocarbons in Oil Sands Process-Affected Water with a Surface Flow Treatment Wetland

Environments ◽  
2020 ◽  
Vol 7 (9) ◽  
pp. 64
Author(s):  
Alexander M. Cancelli ◽  
Frank A. P. C. Gobas
Keyword(s):  
Oil Sands ◽  
Passive Sampling ◽  
Surface Flow ◽  
Passive Samplers ◽  
Treatment Efficiency ◽  
Treatment Wetland ◽  
Total Pahs ◽  
Polycyclic Aromatic ◽  
Individual Pahs ◽  
Flow Treatment

This study applied a passive sampling approach using low-density polyethylene passive samplers to determine the treatment efficiency of the Kearl surface flow treatment wetland for polycyclic aromatic hydrocarbons (PAHs) in Oil Sands Process-affected Waters (OSPW). Treatment efficiency was measured as concentration-reduction and mass-removal from the OSPW. The results show that the wetland’s ability to remove individual PAHs from the influent varied substantially among the PAHs investigated. Treatment efficiencies of individual PAHs ranged between essentially 0% for certain methylated PAHs (e.g., 2,6-dimethylnaphthalene) to 95% for fluoranthene. Treatment in the Kearl wetland reduced the combined total mass of all detected PAHs by 54 to 83%. This corresponded to a reduction in the concentration of total PAHs in OSPW of 56 to 82% with inflow concentrations of total PAHs ranging from 7.5 to 19.4 ng/L. The concentration of pyrene in water fell below water quality targets in the Muskeg River Interim Management Framework as a result of wetland treatment. The application of the passive samplers for toxicity assessment showed that in this study PAHs in both the influent and effluent were not expected to cause acute toxicity. Passive sampling appeared to be a useful and cost-effective method for monitoring contaminants and for determining the treatment efficiency of contaminants in the treatment wetland.

scholarly journals Determination of Polycyclic Aromatic Hydrocarbons (PAHs) on Selected Dumpsites in Abeokuta Metropolis, SW, Nigeria

2015 ◽  
pp. 33-48 ◽  
Author(s):  
Olufunmilayo O. Olayinka ◽  
Oludare H. Adedeji ◽  
Ayodele R. Ipeaiyeda
Keyword(s):  
Endocrine Disruption ◽  
Aromatic Hydrocarbons ◽  
Isomer Ratio ◽  
Dump Site ◽  
Total Pahs ◽  
Dutch Guideline ◽  
Ogun State ◽  
Polycyclic Aromatic ◽  
Individual Pahs

Knowledge of the concentration of polycyclic aromatic hydrocarbon (PAHs) in urban soils remains insufficient in developing countries like Nigeria despite their toxic effects and suspected human carcinogens, mutagens and endocrine disruption. This study aimed to determine the concentration of PAHs in soil of three dumpsites in Abeokuta metropolis, Ogun State, Nigeria. Concentrations of individual PAHs were determined using Gas Chromatography Flame Ioni-zation Detector (GC-FID). The total PAHs concentrations at 0-15 cm depth were 29.0 mg kg-1, 41.6 mg kg-1 and 11.9 mg kg-1 for Igbore, Saje and Alogi dumpsites respectively while the corres-ponding total PAHs concentrations at 15-30 cm depth were 9.3 mg kg-1, 28.3 mg kg-1 and 11.0 mgkg-1respectively. These concentrations were slightly lower than the Dutch guideline limits of 40 mg kg-1 except for that of Saje at 0-15 cm depth. The amounts of fluoranthene at Igbore dumpsite in the two depths were 23.64 mg kg-1 and 8.02 mg kg-1, with a total sum of 10 PAHs compounds of 19.12 mg kg-1. The results showed that the highest concentration of a single PAHs compound was at Saje dump-site with fluoranthene value of 33.75 mg kg-1 and 22.74 mg kg-1 at the depths of 0-15 and 15-30 cm respectively. Isomer ratio for fluoranthene/pyrene was 2.69 at Alogi dumpsite, which suggested that the PAHs were from pyrogenic sources. Carcinogenic PAHs constituted about 1.29-15.69 % of the total PAHs detected in the dumpsite raising concerns of human exposure through the food chain.

Initial performance of a high capacity surface-flow treatment wetland

Wetlands ◽  
2002 ◽  
Vol 22 (3) ◽  
pp. 522-527 ◽  
Author(s):  
Matthew F. Knowlton ◽  
Craig Cuvellier ◽  
John R. Jones
Keyword(s):  
High Capacity ◽  
Surface Flow ◽  
Treatment Wetland ◽  
Capacity Surface ◽  
Flow Treatment

scholarly journals Development of method of isolation and purification of PAHs from exposed semipermeable membrane devices (SPMDs) prior to GC-MS analysis

2013 ◽  
Vol 6 (2) ◽  
pp. 281-287 ◽  
Author(s):  
Veronika Klučárová ◽  
Eva Benická ◽  
Branislav Vrana
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Organic Contaminants ◽  
Passive Sampling ◽  
Gel Permeation Chromatography ◽  
Semipermeable Membrane ◽  
Passive Samplers ◽  
Isolation And Purification ◽  
Semipermeable Membrane Devices ◽  
Polycyclic Aromatic

Abstract Surface water pollution by organic contaminants was investigated using passive sampling by semipermeable membrane devices (SPMDs), based on free transfer of analyte (diffusion) from water into receiving phase of sampler. The work was aimed at isolation method of contaminants from passive samplers extracts and instrumental analysis of polycyclic aromatic hydrocarbons. Gel permeation chromatography after silica gel sample cleanup was used as a method for cleaning the extracts of passive samplers from interfering Triolein, the receiving phase in the samplers. The efficiency of isolation and cleaning was determined for polycyclic aromatic hydrocarbons as a target group of contaminants. Polycyclic aromatic hydrocarbons were determined in the obtained fraction by gas chromatography coupled with mass spectrometry.

scholarly journals Distribution and degradation trend of micropollutants in a surface flow treatment wetland revealed by 3D numerical modelling combined with LC-MS/MS

2021 ◽  
Vol 190 ◽  
pp. 116672
Author(s):  
Loïc Maurer ◽  
Claire Villette ◽  
Nicolas Reiminger ◽  
Xavier Jurado ◽  
Julien Laurent ◽  
...  
Keyword(s):  
Numerical Modelling ◽  
Surface Flow ◽  
Treatment Wetland ◽  
3D Numerical Modelling ◽  
Flow Treatment

scholarly journals Bioaccessibility of Polycyclic Aromatic Hydrocarbons (PAHs) in Grilled Meat: The Effects of Meat Doneness and Fat Content

2022 ◽  
Vol 19 (2) ◽  
pp. 736
Author(s):  
Elliyana Nadia Hamidi ◽  
Parvaneh Hajeb ◽  
Jinap Selamat ◽  
Soo Yee Lee ◽  
Ahmad Faizal Abdull Razis
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
High Performance ◽  
Fat Content ◽  
Cooking Time ◽  
Total Pahs ◽  
Positive Linear Correlation ◽  
Polycyclic Aromatic ◽  
Individual Pahs ◽  
Meat Samples

Exposure to polycyclic aromatic hydrocarbons (PAHs) through diet is gaining concern due to the risk it poses to human health. This study evaluated the bioaccessibility of PAHs contained in charcoal-grilled beef and chicken in different segments of the gastrointestinal tract (GIT) with regard to the degree of doneness and fat content of the meats. The levels of 15 PAHs in the grilled meat samples and bioaccessible fractions were determined using high-performance liquid chromatography (HPLC) equipped with PAH column, and UV and fluorescence detectors. Total PAHs were found in beef (30.73 ng/g) and chicken (70.93 ng/g) before its digestion, and different PAHs’ bioaccessibility were observed in the different segments of GIT, with the highest in the stomach followed by the small intestine, despite the relatively higher bioaccessibility of individual PAHs in grilled beef as compared to those in grilled chicken. Additionally, the PAHs’ bioaccessibility increased with the increase in the degree of doneness. Positive linear correlation was observed for the PAHs’ bioaccessibility and the fat contents of grilled meat. Overall, this study highlights the influence of meat doneness (cooking time) and fat contents on the bioaccessibility and bioaccumulation of PAHs.

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