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Health risk assessment and growth characteristics of wheat and maize crops irrigated with contaminated wastewater

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Abstract

The present study evaluated the effect of untreated wastewater irrigation and its health risks in Triticum aestivum (wheat) and Zea mays (maize) cultivated at south Cairo, Egypt. Morphological measurements (stem and root lengths, number of leaves per plant, and dry weights of main organs) as well as soil, irrigation water, and plant analyses for nutrients and heavy metals were conducted in polluted and unpolluted sites. Wastewater irrigations leads to reduction in the morphological traits of the plants and reduced its vegetative biomass and yield production, with more negative impacts on maize than wheat. The concentrations of Pb, Cd, Cr, and Fe in roots and leaves of wheat were above the phytotoxic limits. Conversely, Pb, Cd, and Fe were significantly high and at phytotoxic concentrations in the leaves of maize at polluted site. The present study indicated that wheat plants tend to phytostabilize heavy metals in their roots, while maize accumulates it more in their leaves. Maize and wheat had toxic concentrations of Pb and Cd in their grains under wastewater irrigation. The health risk index showed values > 1 for Pb and Cd in polluted site for both crops, in addition to maize in unpolluted site. Consequently, this will have greatest potential to pose health risk to the consumers.

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Authors and Affiliations

  1. Botany and Microbiology Department, Faculty of Science, Helwan University, Hewlan, Egypt

    Emad A. Farahat, Tarek M. Galal & Loutfy M. Hassan

  2. Tabbin Institute for Metallurgical Studies, Hewlan, Egypt

    Omar E. Elawa

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  1. Emad A. Farahat
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  2. Tarek M. Galal
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  3. Omar E. Elawa
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  4. Loutfy M. Hassan
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Correspondence to Emad A. Farahat.

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Farahat, E.A., Galal, T.M., Elawa, O.E. et al. Health risk assessment and growth characteristics of wheat and maize crops irrigated with contaminated wastewater. Environ Monit Assess 189, 535 (2017). https://doi.org/10.1007/s10661-017-6259-x

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  • DOI: https://doi.org/10.1007/s10661-017-6259-x

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