Metal–Polycyclic Aromatic Hydrocarbon Mixture Toxicity in Hyalella azteca. 1. Response Surfaces and Isoboles To Measure Non-additive Mixture Toxicity and Ecological Risk

2015 ◽  
Vol 49 (19) ◽  
pp. 11772-11779 ◽  
Author(s):  
Patrick T. Gauthier ◽  
Warren P. Norwood ◽  
Ellie E. Prepas ◽  
Greg G. Pyle
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Ecological Risk ◽  
Mixture Toxicity ◽  
Hyalella Azteca ◽  
Response Surfaces ◽  
Hydrocarbon Mixture ◽  
Polycyclic Aromatic

scholarly journals Heart development in two populations of Atlantic killifish (Fundulus heteroclitus) following exposure to a polycyclic aromatic hydrocarbon mixture

2021 ◽  
Vol 208 ◽  
pp. 111580
Author(s):  
Melissa Chernick ◽  
Tara Burke ◽  
Noah Lieberman ◽  
Daniel R. Brown ◽  
Richard T. Di Giulio ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Heart Development ◽  
Fundulus Heteroclitus ◽  
Hydrocarbon Mixture ◽  
Polycyclic Aromatic ◽  
Two Populations ◽  
Atlantic Killifish

scholarly journals Concentration Distribution and Ecological Risk Assessment of Polycyclic Aromatic Hydrocarbon in Kolo Creek Niger-Delta Nigeria

2020 ◽  
pp. 62-70
Author(s):  
Uzoekwe S. A. ◽  
Ikpesu T. O.
Keyword(s):  
Risk Assessment ◽  
Molecular Weight ◽  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Niger Delta ◽  
Aquatic Organisms ◽  
Polycyclic Aromatic ◽  
High Concentrations

The ecological risk assessment of 16 USEPA priority polycyclic aromatic hydrocarbon (PAHs) in water and sediments of Kolo creek, Niger Delta Nigeria was assessed the samples were collected from November, 2018 to June, 2019 from seven locations (A-G) along the creek. The samples were extracted using standard methods and analyzed using gas chromatography (model: HP5890 S). The concentrations of the PAHs in the water and sediment samples ranged between 0.000 - 9.239 µ/L and .002 – 374.35µg/Kg respectively. All the compounds analyzed were detected in all the sampling places, even area far from the flow stations. Hence, the urban runoffs, sewage discharges, and agricultural activities are implicated. Four rings hydrocarbon were present in higher concentration when compared to other PAHs in all sampling sites, with benz (a)anthracene having the highest values in both matrixes. Similarly, lower molecular weight (LMW) PAHs were present in lower concentrations in all sampling sites and they are known to exhibit higher lethal toxicity than the larger PAHs. HMW were present in high concentrations than LMW and are persistent in the environment as a result of their increase resistance to oxidation, reduction and vaporization as molecular weight increases. Similarly, The PAFs of the investigated creek is less than 5%, suggesting existences of minor ecological risks that are insignificance. However, the TEQs detected in high molecular weight showed that there is possibility of cancer to those who may be exposed to the bottom sediment. The indices measured in this habitat may put more pressures to the aquatic organisms and cause drastic changes to their ecosystem which may lead to species extinction.

An evaluation of the ability of chemical measurements to predict polycyclic aromatic hydrocarbon-contaminated sediment toxicity to Hyalella azteca

2010 ◽  
Vol 29 (7) ◽  
pp. 1545-1550 ◽  
Author(s):  
Kathleen M. McDonough ◽  
Nicholas A. Azzolina ◽  
Steven B. Hawthorne ◽  
David V. Nakles ◽  
Edward F. Neuhauser
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Sediment Toxicity ◽  
Hyalella Azteca ◽  
Contaminated Sediment ◽  
Chemical Measurements ◽  
Polycyclic Aromatic
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