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    Tytuł:
    Health implications of stream water contamination by industrial effluents in the Onitsha urban area of Southeastern Nigeria
    Autorzy:
    Okafor, Uchenna P.
    Obeta, Michael C.
    Ayadiuno, Romanus U.
    Onyekwelu, Anthony C.
    Asuoha, Godson C.
    Eze, Eberechukwu J.
    Orji-Okafor, Chetachi E.
    Igboeli, Emeka E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1844374.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    contamination
    health implication
    industrial effluents
    Onitsha urban
    stream water
    Opis:
    Nigeria has abundant surface and ground water resources many of which are polluted and can be detrimental to human health when consumed. This study investigated the effects of effluents discharged by industries into streams on the health of people who depend on stream water for domestic purposes in the Onitsha urban area of eastern Nigeria. Water samples collected from eleven discharge locations underwent physico-chemical and microbiological analyses. Data on the effects of industrial effluents on health were obtained from records in the public hospitals located in Onitsha as well as through questionnaire surveys and field observations. The results of the analyses revealed that the effluents grossly degrade surface water bodies; several parameters (temperature, iron, dissolved oxygen, turbidity, biological oxygen demand, chemical oxygen demand, lead, magnesium, total heterotrophic counts, total coliform group, pH) had values which were higher than the WHO (2011) safety limits for drinking water. The contamination of investigated streams by effluents had negative impact on the health of stream users. The discussion included health effects of polluted water and the prevalence of water borne or related diseases in the area. Implications of these findings were also discussed. Management measures capable of minimizing contamination of surface water in the study area were suggested.
    Źródło:
    Journal of Water and Land Development; 2021, 48; 105-114
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Survey of polycyclic aromatic hydrocarbons and lead in Chinese teas sold in Nigeria: levels and health implications
    Autorzy:
    Orisakwe, O.E.
    Mbagwu, H.O.C.
    Ukpai, P.
    Udowelle, N.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/875164.pdf
    Data publikacji:
    2015
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    polycyclic aromatic hydrocarbon
    lead
    tea
    Chinese tea
    Nigeria
    risk assessment
    food safety
    food analysis
    pollutant level
    health implication
    Opis:
    Background. The belief that Chinese teas are of immense health benefits by many Nigerians has led to high consumption rate. Objectives. This study has determined lead and polycyclic aromatic hydrocarbons (PAHs) levels of Chinese teas popularly consumed in Nigeria and to estimate the potential health risks. Material and Methods. Twenty brands of Chinese teas commonly consumed in Nigeria purchased in October 2014 were used in the study. Tea samples were extracted and digested. Lead, and PAHs were analyzed using an atomic absorption spectrophotometric (AAS) and gas chromatographic methods, respectively. Daily intake, percent violations of permissible limits, target hazard quotients (THQ), Health Risk Index (HRI) of lead, and other cancer risk parameters of PAHs were estimated. Results. All the tea samples except super natural green tea violated the WHO permissible limit of lead (0.01 mg/kg) by over 100%. The HRI ranged from 5.09 x 10-5 – 7.20 x 10-4 . Among the single analyzed compounds, the pyrenes had the highest concentration of 14.31 mg/kg. The intake of benzo[a]pyrene was detected in 25% of the samples which ranged from 0.066 to 0.145 mg/kg and exceeded the permissible daily limit of benzo[a]pyrene intake. The estimated cancer risk from this study in an adult is 5.07 x 10-9. Conclusion. The present study suggests that consumption of Chinese teas in Nigeria may not be one of the factors responsible for the increased rate of cancer in Nigeria.
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 2015, 66, 3
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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