Effects of humic substances on the bioconcentration of polycyclic aromatic hydrocarbons: Correlations with spectroscopic and chemical properties of humic substances

1999 ◽  
Vol 18 (12) ◽  
pp. 2782-2788 ◽  
Author(s):  
Markus Haitzer ◽  
Gudrun Abbt-Braun ◽  
Walter Traunspurger ◽  
Christian E.W. Steinberg
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Humic Substances ◽  
Aromatic Hydrocarbons ◽  
Chemical Properties ◽  
Polycyclic Aromatic ◽  
And Chemical Properties

scholarly journals Physical and Chemical Properties of Polycyclic Aromatic Hydrocarbons

1989 ◽  
Vol 135 ◽  
pp. 155-171
Author(s):  
S. Leach
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Interstellar Medium ◽  
Aromatic Hydrocarbons ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Polycyclic Aromatic ◽  
The Stability ◽  
Physical And Chemical ◽  
And Chemical Properties

A review is presented of some physical and chemical properties of polycyclic aromatic hydrocarbons (PAHs) that are relevant for interpreting various aspects of observations and speculations on PAHs in the interstellar medium. The subjects discussed are: the stability and reactivity of neutral and ionic PAHs; the spectroscopy and photophysics of neutral and monocationic PAHs; the photostabilities of PAH monocations and dications and their astrophysical implications.

Partitioning of unsubstituted Polycyclic Aromatic Hydrocarbons between surface sediments and the water column in the Brisbane River Estuary

1990 ◽  
Vol 41 (4) ◽  
pp. 443 ◽  
Author(s):  
SI Kayal ◽  
DW Connell
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Water Column ◽  
Aromatic Hydrocarbons ◽  
Partition Coefficients ◽  
Laboratory Experiments ◽  
River Estuary ◽  
Chemical Properties ◽  
Linear Relationships ◽  
Physico Chemical ◽  
Polycyclic Aromatic

In all, 23 sediment samples and 8 water column samples from the Brisbane River estuary, Queensland, Australia, were analysed for polycyclic aromatic hydrocarbons (PAHs) in order to assess the field partitioning behaviour of these hydrocarbons. Twelve PAHs, ranging in molecular weight from naphthalene to benzo[a]pyrene, were identified and quantified. Their partition coefficients, indexed to sediment organic carbon and lipid content, were calculated after filtering to remove particulates and making a calculated adjustment for colloids, or organic matter, in the water phase. In logarithmic form, the partition coefficients were related to the physico-chemical properties of the compounds (Kow, Sw, RRT) by relationships having a parabolic shape rather than being linear. However, compounds with log Kow values of less than 5.5 gave linear relationships comparable to, but distinctly different from, those obtained from laboratory experiments. It is suggested that field conditions have distinctive differences from laboratory experiments that do not allow the direct translation of laboratory-based relationships to the natural aquatic environment.

scholarly journals Topological Analysis of PAHs using Irregularity based Indices

2021 ◽  
Vol 12 (3) ◽  
pp. 2970-2987
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Topological Analysis ◽  
Chemical Properties ◽  
Topological Descriptors ◽  
Graph Invariants ◽  
Chemical Structures ◽  
Potential Applications ◽  
Polycyclic Aromatic ◽  
Analytical Expressions

Topological descriptors are non-empirical graph invariants that characterize the structures of chemical molecules. The structural descriptors are vital components of QSAR/QSPR studies which form the basis for theoretical chemists to design and investigate new chemical structures. Irregularity indices are a class of topological descriptors that have been employed to study certain chemical properties of compounds. This article aims to compute analytical expressions of irregularity indices for three important classes of polycyclic aromatic hydrocarbons. The intriguing properties of these classes of compounds have several potential applications in wide-raging fields, which warrant a study of their properties from a structural perspective. Additionally, the 3D graphical representations of a few indices are presented, which will aid in analyzing the similarity of behavior among the indices.

scholarly journals A method for partitioning dissolved polycyclic aromatic hydrocarbons associated with humic substances using polyethylenimine-coated glass fiber filters

RSC Advances ◽  
2021 ◽  
Vol 11 (46) ◽  
pp. 28704-28710
Author(s):  
Hisanori Iwai ◽  
Rodrigo Mundo ◽  
Seiya Nagao
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Glass Fiber ◽  
Humic Substances ◽  
Aromatic Hydrocarbons ◽  
Glass Fiber Filter ◽  
Coated Glass ◽  
Polycyclic Aromatic ◽  
Fiber Filter

The use of a glass fiber filter coated with polyethyleneimine (PcGF) for partitioning dissolved polycyclic aromatic hydrocarbons (PAHs) that are associated with humic substances (HSs) is reported.

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