Dataset Information

Pollution and contamination assessment of heavy metals in the sediments of Jazmurian playa in southeast Iran.

ABSTRACT: Jazmurian playa was an ephemeral lake with a large catchment in southeast Iran, which dried up over the last 10 years as a result of prolonged drought. As the lake was recipient of incoming industrial water with trace metals deposited to the sediment, the dust is the cause of environmental concern of the region and requires evaluation and better management. The aim of this study was to evaluate the environmental and ecological pollution of Jazmurian playa. Hence, 24 collected surface sedimentary samples were analyzed with ICP-OES. The environmental pollution indices including degree of contamination (Cd), geoaccumulation index (Igeo), enrichment factor (EF), pollution load index (PLI) and potential ecological risk (PER) were determined. The study revealed moderately to strongly pollution levels of Pb, Ni and Al, while Dy, Pb, Y, Yb, Sm, Te, U, Cu, Mn, Sc represented moderate pollution. The EF values indicated four sites were highly enriched with Dy, Pb and Ni. The PER results showed high risk for four sites and considerable risk for others. Cluster analysis illustrated interconnection between the contaminants and the sites with major pollution at six sites. Obviously, climate change has considerable complex environmental impacts through transformation of local water and sediment pollution problem.

SUBMITTER: Shirani M

PROVIDER: S-EPMC7075869 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature

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Pollution and contamination assessment of heavy metals in the sediments of Jazmurian playa in southeast Iran.

Shirani Mahboube M Afzali Keramat Nezhad KN Jahan Sayka S Strezov Vladimir V Soleimani-Sardo Mojtaba M

Scientific reports 20200316 1

Jazmurian playa was an ephemeral lake with a large catchment in southeast Iran, which dried up over the last 10 years as a result of prolonged drought. As the lake was recipient of incoming industrial water with trace metals deposited to the sediment, the dust is the cause of environmental concern of the region and requires evaluation and better management. The aim of this study was to evaluate the environmental and ecological pollution of Jazmurian playa. Hence, 24 collected surface sedimentary ...[more]

PMID: 32179836

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Project description:Concentrations of six heavy metals such as Fe, Pb, Cu, Cd, Ni and Zn in dry atmospheric deposits weekly collected through 20 sample sites from Sfax solar saltern during two successive sampling campaigns, selected from a long time monitoring, have been examined in order to evaluate their contamination levels as well as their human health risk; such concentrations (expressed in mg/kg) have shown that Fe varied from 7006.24 to 7856.45, Pb from 8.64 to 344.45, Cu from 9.33 to 298.67, Cd from 0.16 to 85.24, Ni from 6.02 to 150.02, and Zn from 12.23 to 624.57. During the study period, average concentrations (mg/kg) have been 7315.99, 103.08, 82.34, 15.93, 46.21 and 142.39, for Fe, Pb, Cu, Cd, Ni and Zn, respectively. Except for Fe, the other concentrations in dry atmospheric deposits have recorded the highest level during the first campaign especially in the sites which are close and more exposed to emissions of local pollutant industries, as well as nearby main road, resulting from high exposure frequencies. Statistical approaches, such as principal component analysis and hierarchical cluster analysis have been applied to all data, revealing an affinity between analyzed metals resulting from their origins, and confirming the influence of exposure frequencies on the spatial variability of heavy metal concentrations. Human health risk assessment has revealed that ingestion of heavy metals is the main exposure pathway for the local population. Computed Hazardous Quotient and Hazardous Index have been higher for children than for adults, thus indicating that the former may be subjected to potentially higher health risk than the latter especially during the first campaign. Calculated carcinogenic risks through ingestion and dermal contact, as well as the total carcinogenic risk for the selected heavy metals, have shown that cancer could occur more probably through ingestion than dermal contact, for children than adult, and during the first campaign (during C1: average values CRing?=?8.72?×?10-4 and CRder?=?1.40?×?10-6 for child; average values CRing?=?5.61?×?10-5 and CRder?=?2.84?×?10-6 for adult) than the second one (during C2: average values CRing?=?1.59?×?10-4 and CRder?=?2.54?×?10-7 for child; average values CRing?=?1.02?×?10-5 and CRder?=?5.19?×?10-7 for adult). The total calculated carcinogenic risk through all the sites have infrequently signaled high to very high carcinogenic risk in the first campaign (average CRA?=?8.73?×?10-4 for child and CRA?=?5.89?×?10-5 for adult) and occasionally exceeded the safe range for the local population in the second one (average CRA?=?1.59?×?10-4 for child and CRA?=?1.07?×?10-5 for adult).

Dataset Information

Pollution and contamination assessment of heavy metals in the sediments of Jazmurian playa in southeast Iran.

Publications

Pollution and contamination assessment of heavy metals in the sediments of Jazmurian playa in southeast Iran.

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