Authors :
Loremikan, A.G; Ngah, S.A.; Ubong, I.U.
Volume/Issue :
Volume 5 - 2020, Issue 6 - June
Google Scholar :
http://bitly.ws/9nMw
Scribd :
https://bit.ly/2BHZl32
Abstract :
Household solid waste dumpsites located within the
habitation on humans poses health risk via ingestion,
dermal contact and inhalation when Polycyclic Aromatic
Hydrocarbons are generated. This study investigated the
concentration levels of PAHs in the soil at dumpsites for
human health risk assessment at solid waste dumpsites
located in Markets, Semi-industrial and Residential
areas.
Materials and Method:
Fifteen soil samples were collected in each season
and analyzed at the Rivers State University, Institute of
Pollution Studies Research Laboratory Gas
Chromatography. Each of the season laboratory data
were subjected to Ecological Toxicity, Environmental
Risk Quotient and Incremental lifetime Cancer Risk
(ILCR) Analysis.
Results:
High Molecular weight (HMW) PAHs which are
toxicologically relevant were detected in all the three
classified dumpsites in both seasons with highest value of
Chrysene in residential dumpsites during rainy season
and Dibenez(a,h)anthracene in dry season. Each of
classified dumpsites has average total PAHs values
greater than 1mg/kg (>1) in Rainy season while in dry
season, only market dumpsites has an average greater
than 1mg/kg.. On health risk assessment, The PAHs
generated at each classified dumpsite during Rainy
season are from pyrogenic source since the Index (PI)
values are all less the 1(<1), however residential
dumpsites with PI > 1 in dry season indicates petrogenic
source. The Risk Quotient (Negligible concentrations
(RQNCs) values for the PAHs and the Risk Quotient
Maximum Permissible concentration (RQMPCs) of
individual PAHs were all less than 1.0, indicating that
the listed PAHs pose a moderate level of ecological risk
in these study sites since they are all less than the
threshold ecological risk values of 0.8mg/kg. The
Incremental Life Cancer Risk (ILCR) values of the
PAHs on most sites during Rainy season are higher than
1 x10-6 which by USEPA standard, indicates risk of
cancer. However, the Dry season shows lesser values
Keywords :
Polycyclic Aromatic Hydrocarbons, Pyrogenic, Health Risk.
Household solid waste dumpsites located within the
habitation on humans poses health risk via ingestion,
dermal contact and inhalation when Polycyclic Aromatic
Hydrocarbons are generated. This study investigated the
concentration levels of PAHs in the soil at dumpsites for
human health risk assessment at solid waste dumpsites
located in Markets, Semi-industrial and Residential
areas.
Materials and Method:
Fifteen soil samples were collected in each season
and analyzed at the Rivers State University, Institute of
Pollution Studies Research Laboratory Gas
Chromatography. Each of the season laboratory data
were subjected to Ecological Toxicity, Environmental
Risk Quotient and Incremental lifetime Cancer Risk
(ILCR) Analysis.
Results:
High Molecular weight (HMW) PAHs which are
toxicologically relevant were detected in all the three
classified dumpsites in both seasons with highest value of
Chrysene in residential dumpsites during rainy season
and Dibenez(a,h)anthracene in dry season. Each of
classified dumpsites has average total PAHs values
greater than 1mg/kg (>1) in Rainy season while in dry
season, only market dumpsites has an average greater
than 1mg/kg.. On health risk assessment, The PAHs
generated at each classified dumpsite during Rainy
season are from pyrogenic source since the Index (PI)
values are all less the 1(<1), however residential
dumpsites with PI > 1 in dry season indicates petrogenic
source. The Risk Quotient (Negligible concentrations
(RQNCs) values for the PAHs and the Risk Quotient
Maximum Permissible concentration (RQMPCs) of
individual PAHs were all less than 1.0, indicating that
the listed PAHs pose a moderate level of ecological risk
in these study sites since they are all less than the
threshold ecological risk values of 0.8mg/kg. The
Incremental Life Cancer Risk (ILCR) values of the
PAHs on most sites during Rainy season are higher than
1 x10-6 which by USEPA standard, indicates risk of
cancer. However, the Dry season shows lesser values
Keywords :
Polycyclic Aromatic Hydrocarbons, Pyrogenic, Health Risk.
