TY - JOUR
T1 - Particle phase distribution of polycyclic aromatic hydrocarbons in stormwater — Using humic acid and iron nano-sized colloids as test particles
AU - Nielsen, Katrine
AU - Kalmykova, Yuliya
AU - Strömvall, Ann-Margret
AU - Baun, Anders
AU - Eriksson, Eva
PY - 2015
Y1 - 2015
N2 - The distribution of polycyclic aromatic hydrocarbons (PAHs) in different particulate fractions in stormwater:
Total, Particulate, Filtrated, Colloidal and Dissolved fractions, were examined and compared to synthetic suspensions
of humic acid colloids and iron nano-sized particles. The distribution of low-molecular weight PAHs (LMW
PAHs), middle-molecular weight PAHs (MMWPAHs) and high-molecularweight PAHs (HMWPAHs) among the
fractions was also evaluated. The results from the synthetic suspensions showed that the highest concentrations
of the PAHs were found in the Filtrated fractions and, surprisingly, high loads were found in the Dissolved fractions.
The PAHs identified in stormwater in the Particulate fractions and Dissolved fractions follow their hydrophobic
properties. In most samples N50% of the HMW PAHs were found in the Particulate fractions, while the
LMW and MMW PAHs were found to a higher extent in the Filtrated fractions. The highest concentrations of
PAHs were present in the stormwater with the highest total suspended solids (TSS); the relative amount of
the HMWPAHs was highest in the Particulate fractions (particles N 0.7 μm). The highest concentration of PAHs
in the Colloidal fraction was found in the sample with occurrence of small nano-sized particles (b10 nm). The results
show the importance of developing technologies that both can manage particulate matter and effectively
remove PAHs present in the Colloidal and Dissolved fractions in stormwater.
© 2015 Elsevier B.V. All rights reserved.
AB - The distribution of polycyclic aromatic hydrocarbons (PAHs) in different particulate fractions in stormwater:
Total, Particulate, Filtrated, Colloidal and Dissolved fractions, were examined and compared to synthetic suspensions
of humic acid colloids and iron nano-sized particles. The distribution of low-molecular weight PAHs (LMW
PAHs), middle-molecular weight PAHs (MMWPAHs) and high-molecularweight PAHs (HMWPAHs) among the
fractions was also evaluated. The results from the synthetic suspensions showed that the highest concentrations
of the PAHs were found in the Filtrated fractions and, surprisingly, high loads were found in the Dissolved fractions.
The PAHs identified in stormwater in the Particulate fractions and Dissolved fractions follow their hydrophobic
properties. In most samples N50% of the HMW PAHs were found in the Particulate fractions, while the
LMW and MMW PAHs were found to a higher extent in the Filtrated fractions. The highest concentrations of
PAHs were present in the stormwater with the highest total suspended solids (TSS); the relative amount of
the HMWPAHs was highest in the Particulate fractions (particles N 0.7 μm). The highest concentration of PAHs
in the Colloidal fraction was found in the sample with occurrence of small nano-sized particles (b10 nm). The results
show the importance of developing technologies that both can manage particulate matter and effectively
remove PAHs present in the Colloidal and Dissolved fractions in stormwater.
© 2015 Elsevier B.V. All rights reserved.
KW - Colloid enhanced transport
KW - Liquid–liquid extraction
KW - Solid phase extraction
KW - Particle sorption
KW - Urban stormwater
U2 - 10.1016/j.scitotenv.2015.05.093
DO - 10.1016/j.scitotenv.2015.05.093
M3 - Journal article
SN - 0048-9697
VL - 532
SP - 103
EP - 111
JO - Science of the Total Environment
JF - Science of the Total Environment
ER -