Adsorption of polycyclic aromatic hydrocarbons (PAHs) on Rhizopus oryzae cell walls: Application of cosolvent models for validating the cell wall-water partition coefficient

2011 ◽  
Vol 102 (22) ◽  
pp. 10542-10547 ◽  
Author(s):  
Bin Ma ◽  
Minmin Xu ◽  
Jiaojiao Wang ◽  
Huaihai Chen ◽  
Yan He ◽  
...  
Keyword(s):  
Cell Wall ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Partition Coefficient ◽  
Aromatic Hydrocarbons ◽  
Cell Walls ◽  
Rhizopus Oryzae ◽  
Water Partition Coefficient ◽  
Polycyclic Aromatic

scholarly journals The octanol-air partition coefficient KOA as a predictor of gas-particle partitioning of polycyclic aromatic hydrocarbons and polychlorinated biphenyls at industrial and urban sites

2011 ◽  
Vol 76 (3) ◽  
pp. 447-458 ◽  
Author(s):  
Jelena Radonic ◽  
Mirjana Vojinovic-Miloradov ◽  
Maja Turk-Sekulic ◽  
Jelena Kiurski ◽  
Maja Djogo ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Polychlorinated Biphenyls ◽  
Partition Coefficient ◽  
Aromatic Hydrocarbons ◽  
Correlation Coefficients ◽  
Field Measurements ◽  
Absorption Model ◽  
Adsorption Model ◽  
Polycyclic Aromatic ◽  
Urban Sites

The main objectives of the research were to estimate the relationship between the gas-particle partition coefficient, Kp, and the octanol-air partition coefficient, KOA, of polycyclic aromatic hydrocarbons, PAHs, and polychlorinated biphenyls, PCBs, at industrial and urban sites in the Vojvodina region, to compare the obtained slopes and intercepts of the log vs. log KOA relations with the results of regression analyses reported in previous studies and to assess the consistency between the particle-bound fractions predicted by the KOA absorption model and the results obtained within field measurements. Fairly good log KP - log KOA correlations, with an average value of the correlation coefficients of 0.70, indicate that the partition coefficient KOA can be used as a prediction parameter of the gas-particle partitioning processes for both classes of compounds. The results of modelling the atmospheric distribution of PAHs using the KOA absorption model showed inconsistencies between the measured and predicted values of the particle-bound fraction, ?, of 1-2 orders of magnitude, while significantly higher discrepancies for PAHs in the Nap-Ace range were found. A similar variability of the measured/modelled ? values was obtained using the Junge-Pankow adsorption model, indicating the presence of particles enriched with PAHs. The conducted research showed that the KOA-based approach was less suitable for predicting the gas-particle partitioning of PCBs in urban and industrial sites, compared to the Junge-Pankow model.

scholarly journals Efficiency of single and mixed dimeric surfactants micelles on solubil-ization of polycyclic aromatic hydrocarbons

2020 ◽  
Vol 3 (1) ◽  
pp. 8
Author(s):  
Naveen Kumar ◽  
Rashmi Tyagi ◽  
V.K. Tyagi
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Standard Free Energy ◽  
Significant Information ◽  
Micellar Properties ◽  
Water Partition Coefficient ◽  
Polycyclic Aromatic ◽  
Insoluble Compounds ◽  
Dimeric Surfactants ◽  
Selection Of

The solubilization of polycyclic aromatic hydrocarbons (PAHs) such as naphthalene, phenanthrene and pyrene by single and mixed anionic dimeric surfactants was investigated and correlated with micellar properties of these surfactants. The surface and micellar properties of single and binary mixed combinations of anionic dimeric surfactants have been studied through surface tension as well as conductivity measurements at 300 K. The associations between their micelle properties and solubilizing efficiency towards PAHs have been quantified and discussed in terms of the molar solubilization ratio (MSR), micelle-water partition coefficient (Km) and standard free energy of solubilization (ΔG0S).The negative value of ΔG0Sexhibits spontaneously the solubilization process. The MSR values increase with the order “pyrene < phenanthrene < naphthalene”. The current study provides significant information for the selection of mixed dimeric surfactants for solubilizing water-insoluble compounds.

The Assessment of Contamination and Source of Polycyclic Aromatic Hydrocarbons from the Sediments of the Someş River

2019 ◽  
Vol 64 (1) ◽  
pp. 55-67
Author(s):  
Vlad Pӑnescu ◽  
◽  
Mihaela Cӑtӑlina Herghelegiu ◽  
Sorin Pop ◽  
Mircea Anton ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Polycyclic Aromatic

1,1’-Biaceanthrylene and 2,2'-Biaceanthrylene: Models for Linking Larger Polycyclic Aromatic Hydrocarbons via Five-Membered Rings

2019 ◽  
Author(s):  
Yachu Du ◽  
Kyle Plunkett
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Electronic Properties ◽  
Aromatic Hydrocarbons ◽  
Model Systems ◽  
Redox Potentials ◽  
Dimer Model ◽  
Optical And Electronic Properties ◽  
Polycyclic Aromatic

We show that polycyclic aromatic hydrocarbon (PAH) chromophores that are linked between two five-membered rings can access planarized structures with reduced optical gaps and redox potentials. Two aceanthrylene chromophores were connected into dimer model systems with the chromophores either projected outward (2,2’-biaceanthrylene) or inward (1,1’-biaceanthrylene) and the optical and electronic properties were compared. Only the planar 2,2’-biaceanthrylene system showed significant reductions of the optical gaps (1 eV) and redox potentials in relation to the aceanthrylene monomer.<br>

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