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Human Arsenic exposure via dust across the different ecological zones of Pakistan
Institute of Urban Environment, China.
Institute of Urban Environment, China; COMSAT Institute of Information & Technology, Pakistan.
COMSAT Institute of Information & Technology, Pakistan.
COMSAT Institute of Information & Technology, Pakistan.
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2016 (English)In: Ecotoxicology and Environmental Safety, ISSN 0147-6513, E-ISSN 1090-2414, Vol. 126, p. 219-227Article in journal (Refereed) Published
Abstract [en]

The present study aims to assess the arsenic (As) levels into dust samples and its implications for human health, of four ecological zones of Pakistan, which included northern frozen mountains (FMZ), lower Himalyian wet mountains (WMZ), alluvial riverine plains (ARZ), and low lying agricultural areas (LIZ). Human nail samples (N=180) of general population were also collected from the similar areas and all the samples were analysed by using ICP-MS. In general the higher levels (p < 0.05) in paired dust and human nail samples were observed from ARZ and LIZ than those of other mountainous areas (i.e., WMZ and FMZ), respectively. Current results suggested that elevated As concentrations were associated to both natural, (e.g. geogenic influences) and anthropogenic sources. Linear regression model values indicated that As levels into dust samples were associated with altitude (r(2)=0.23), soil carbonate carbon density (SCC; r(2)=033), and population density (PD; r(2)=0.25). The relationship of paired dust and nail samples was also investigated and associations were found for As-nail and soil organic carbon density (SOC; r(2)=0.49) and SCC (r(2)=0.19) in each studied zone, evidencing the dust exposure as an important source of arsenic contamination in Pakistan. Risk estimation reflected higher hazard index (HI) values of non carcinogenic risk (HI > 1) for children populations in all areas (except FMZ), and for adults in LIZ (0.74) and ARZ (0.55), suggesting that caution should be paid about the dust exposure. Similarly, carcinogenic risk assessment also highlighted potential threats to the residents of LLZ and ARZ, as in few cases (5-10%) the values exceeded the range of US -EPA threshold limits (10'6-10-4).

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 126, p. 219-227
Keywords [en]
Arsenic; Dust; Nail; Human health; Pakistan
National Category
Environmental Sciences
Research subject
Risk and Environmental Studies
Identifiers
URN: urn:nbn:se:kau:diva-76047DOI: 10.1016/j.ecoenv.2015.12.044ISI: 000370393700027OAI: oai:DiVA.org:kau-76047DiVA, id: diva2:1381753
Available from: 2019-12-27 Created: 2019-12-27 Last updated: 2020-07-03Bibliographically approved

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