Contamination Status of Water, Fish and Vegetable Samples Collected from a Heavy Industrial Area and Possible Health Risk Assessment
DOI:
https://doi.org/10.17140/aftnsoj-5-159Keywords:
Health risk index (HRI), Hazard index (HI), Metal pollution index (MPI), Toxic effect, Vegetables, FishesAbstract
Aim
The present study was conducted to extract information about heavy metal pollution in water of Karnaphuli river and to assess the risk to public health occurred from consumption of heavy metal contaminated foodstuff like fish and vegetables collected from the adjacent area of Karnaphuli river which receives a huge amount of industrial and domestic wastes from kalurghat heavy industrial area, Chittagong, Bangladesh.
Methods
Energy Dispersive X-ray Fluorescence (EDXRF) Spectrometer (Model: Epsilon 5) was used as major analytical technique for determining elemental concentration. For assessing toxicity level of analyzed foodstuffs and associate health risk problem some indices like metal pollution index (MPI), health risk index (HRI) and hazard index (HI) were also estimated.
Results
The mean value of physicochemical properties like pouvoir hydrogène (pH), electrical conductivity (EC), total dissolved solid (TDS), salinity of river water were found 6.8, 745.5 μS/cm, 458.2 mg/L, 747.4 μS respectively showing that those values are much lower than the Department of Environment (DoE) of Bangladesh suggestive value, indicating safe for irrigation but EC and salinity are higher than the DoE suggestive value for drinking water. In water, the mean concentration of heavy metals in Karnaphuli river was found in the sequence of Fe>K>Cr>Mn>Zn>Cu>As=Ni=Hg>Pb. Chromium, Manganese, Iron, Zinc, and Mercury concentrations are higher than World Health Organization (WHO) standard 2011, United States Environmental Protection Agency (USEPA) 2009 and Bangladesh Standard for drinking water but other elements are within the safe limit. All metal concentrations in water are below the Bangladesh Standard for Irrigation except Iron (Fe). The decreasing trend of heavy metals (mean) in all the vegetable was Fe>Zn>Cu>Cr>Ni>Pb>Co and for all fish was Fe>Mn>Zn>Cr>Ca>Se>Co>Cu>K. Metal pollution index (MPI) for fish and vegetable is high enough to cause any detrimental effect on human. Estimated daily intake (EDI) value for fish followed a decreasing sequence Fe>Mn>Zn>Cr>Cu>Ni=As>Pb and for vegetable samples Fe>Zn>Cu>Mn>Cr>Ni>Pb>As respectively. Health risk assessment (HRI), and hazard index (HI) value are less than one for fish but HI value is greater than one for most of the vegetable samples analysed.
Conclusion
From the overall study it can be concluded that the mean value of physicochemical parameters (pH, EC, TDS, salinity) in river water were much lower than the DoE of Bangladesh suggestive value, indicating safe for irrigation but not safe for drinking. Fishes are safer for human consumption than vegetables collected from that particular area and hence, suggested to consume those veg-etables at lower amount in the diet to reduce any detrimental effect.
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