ارزیابی غلظت و خطر غیر سرطان زایی آرسنیک آبهای زیرزمینی با استفاده از مدل توزیع فضایی ( نقشه کریجینگ سطحی): منطقه هشتبندی میناب، ایران
فصلنامه علمی پژوهشی بهداشت در عرصه,
دوره 2 شماره 3 (1393),
22 September 2015
,
صفحه 32-41
https://doi.org/10.22037/jhf.v2i3.8755
چکیده
زمينه و هدف: ورود فلزات سنگین مانند آرسنیک به منابع آبی به علت تجمع بیولوژیکی، سمی بودن و پایداری محیطی میتواند اثرات نامطلوبی بر سلامت انسان و اکوسیستم داشته باشد.
مواد و روشها: جهت تهیه نقشه کریجینگ سطحی، غلظت آرسنیک در طول سال 13-2012 و در 17 حلقه چاه منطقه هشتبندی میناب اندازه گیری شد. با استفاده از مدل توزیع فضایی، غلظت آرسنیک آبهای زیرزمینی و سهم خطر (HQ) که نشان دهنده خطر غیر سرطان زایی است، مورد ارزیابی قرار گرفت.
يافتهها: میانگین و دامنه غلظت آرسنیک آب زیرزمینی به ترتیب ppb 56/2±69/7 و ppb 7/23- ND بود. غلظت آرسنیک آبهای زیرزمینی در فصل پاییز (شمال غرب منطقه)، در فصل زمستان (شمال شرق)، در فصل بهار (شمال شرق، شمال غرب و مرکز) و در فصل تابستان (مرکز و شرق) در محدوده غیرایمن قرار داشت. جذب روزانه مزمن (CDI) و سهم خطر جمعیت منطقه هشتبندی به ترتیب mg/kg-d 00028/0 و 92/0 محاسبه گردید.
نتيجه گيري: میانگین غلظت آرسنیک و سهم خطر جمعیت شهر هشتبندی به ترتیب در محدوده نگران کننده و ایمن قرار دارند. نقشههای فضایی تهیه شده به روش کریجینگ نشان داد که در مناطق شمال شرق، بیشترین و در جنوب و جنوب غرب کمترین غلظت آرسنیک و به دنبال آن سهم خطر مشاهده گردید. از مدل توزیع فضایی میتوان در ارزیابی غلظت و خطر آلایندههای محیطی استفاده شود.
- آرسنیک
- خطر غیر سرطانزایی
- نقشه کریجینگ سطحی
ارجاع به مقاله
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