Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Status, distribution and ecological risk of organochlorines (OCs) in the surface sediments from the Ravi River, Pakistan
AU - Syed, Jabir Hussain
AU - Malik, Riffat Naseem
AU - Li, Jun
AU - Chaemfa, Chakra
AU - Zhang, Gan
AU - Jones, Kevin C.
PY - 2014/2/15
Y1 - 2014/2/15
N2 - Organochlorines (OCs) including organochlorine pesticides (OCPs) and polychlorinated biphenyl (PCBs) were analyzed in surface sediments from the Ravi River, Punjab, Pakistan. Among the OCPs, hexachlorocyclohexane (HCHs), dichlorodiphenyltrichloroethane (DDTs) and chlordane (cis- and trans-) were most abundant and their concentrations were ranged from n.d to 16.0 ng g(-1), 1.5 to 58.5 ng g(-1) and n.d to 29.0 ng g(-1), respectively. Concentrations of Σ31PCBs ranged from 4.6 to 424.3 ng g(-1) with a mean value of 48.9 ng g(-1). In general, the concentrations of all studied organochlorines (OCs) in sediments collected from the sampling sites in the vicinity of industrial areas were higher than those from the agricultural areas. Compositional analyses of PCBs indicated that penta- and tetra-PCBs homologues were dominant which was consistent with the previous studies. Compared with other areas around the world, levels of OCs in sediments from the Ravi River were within the range, but were found to be much higher than previously reported from Pakistan. According to established sediment quality guidelines (SQGs), screening-level risk assessment of OCPs and PCBs suggested that they have a potential for adverse effects on benthic organisms.
AB - Organochlorines (OCs) including organochlorine pesticides (OCPs) and polychlorinated biphenyl (PCBs) were analyzed in surface sediments from the Ravi River, Punjab, Pakistan. Among the OCPs, hexachlorocyclohexane (HCHs), dichlorodiphenyltrichloroethane (DDTs) and chlordane (cis- and trans-) were most abundant and their concentrations were ranged from n.d to 16.0 ng g(-1), 1.5 to 58.5 ng g(-1) and n.d to 29.0 ng g(-1), respectively. Concentrations of Σ31PCBs ranged from 4.6 to 424.3 ng g(-1) with a mean value of 48.9 ng g(-1). In general, the concentrations of all studied organochlorines (OCs) in sediments collected from the sampling sites in the vicinity of industrial areas were higher than those from the agricultural areas. Compositional analyses of PCBs indicated that penta- and tetra-PCBs homologues were dominant which was consistent with the previous studies. Compared with other areas around the world, levels of OCs in sediments from the Ravi River were within the range, but were found to be much higher than previously reported from Pakistan. According to established sediment quality guidelines (SQGs), screening-level risk assessment of OCPs and PCBs suggested that they have a potential for adverse effects on benthic organisms.
KW - Organochlorines
KW - Surface sediments
KW - Spatial distribution
KW - Potential sources
KW - Risk assessment
KW - Ravi River
U2 - 10.1016/j.scitotenv.2013.10.109
DO - 10.1016/j.scitotenv.2013.10.109
M3 - Journal article
C2 - 24291563
VL - 472
SP - 204
EP - 211
JO - Science of the Total Environment
JF - Science of the Total Environment
SN - 0048-9697
ER -