Concentration analysis and non-carcinogenic risk assessment from arsenic exposure in Hasht-Bandi of Minab with spatial distribution model (surface kriging map)

Monireh Majlessi, Yadolah Fakhri, Maryam Sarkhosh

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Abstract

Background and Aims: The entrance of heavy metals, such as arsenic, in water resources can adversely affect human health and ecosystem through bioaccumulation, toxicity, and environmental resistance.
Materials and Methods: The concentration of arsenic in 17 wells in the region of Hasht-Bandi Minab (Iran) was measured during 2012-2013. Groundwater arsenic concentration and hazard quotient (HQ), which describes non-carcinogenic risk, were assessed applying spatial distribution map (surface kriging map).

Results: The concentration of arsenic in groundwater ranged from non-detectable (ND) to 23.7 ppb, with a mean value of 7.69±2.56 ppb. Depending on the location and season of year, arsenic in groundwater covered a wide range of concentration. In autumn (north-west region), winter (north-east region), spring (north-east, north-west, and center regions) and summer (center and east regions), arsenic concentrations were considered unsafe. Chronic daily intake (CDI) and HQ of studied population were respectively calculated as 0.00028 mg/ kg-d and 0.92.
Conclusion: The mean concentration of arsenic was in worrying range; however, the population living in Hasht Bandi had a HQ in secure range. The spatial maps prepared by kriging method showed that the highest and lowest concentrations of arsenic and subsequently hazard quotient were observed in the north-east and in the south and south-west regions, respectively. The findings of the present study draw a meaningful conclusion relating to the use of spatial distribution model in the evaluation of environmental pollutants concentration and risk.
Key words: Arsenic, Non-carcinogen, Kriging surface map

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References

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