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اکبر نعمتی احمد گلچین اکبر قویدل

چکیده

استخراج نفت و تولید مشتقات نفتی متنوع باعث گسترش آلودگی در خاک­های اطراف مکان­های استخراج و پالایش نفت شده است. بزرگ­ترین نگرانی در این مورد، خطرات زیست محیطی این آلاینده­ها می­باشد. به منظور مطالعه تأثیر گیاه پالایی و زیست پالایی در خاک آلوده به نفت خام یک آزمایش فاکتوریل در قالب طرح کاملا تصادفی و در سه تکرار طراحی و اجرا گردید. فاکتورهای مورد مطالعه شامل سطوح آلودگی خاک با نفت خام شامل صفر (C0)، 2 درصد نفت خام (C1) و 4 درصد نفت خام (C2) و تیمارهای پالایشی شامل کاشت گیاه چمن (B1)، کاشت گیاه یونجه (B2)، کاشت چمن + تلقیح بذر با باکتری سودوموناس پیوتیدا + تلقیح خاک با قارچ فانروکت کریزوسپوریوم (B3)، کاشت یونجه + تلقیح بذر با باکتری سودوموناس پیوتیدا + تلقیح خاک با قارچ فانروکت کریزوسپوریوم (B4) و بدون کشت (شاهد) (B0) بودند. میزان عملکرد ماده خشک گیاهی، میزان حذف نفت خام و تنفس میکروبی برای نمونه­ها اندازه‌گیری شد. نتایج نشان داد غلظت ترکیبات نفتی باقیمانده در سطح C1 آلودگی نفت خام در اثر تیمارهای پالایشی B3 و B4 به‌ترتیب 59 و 5/56 درصد کاهش یافت و در سطح C2 آلودگی نفت خام نیز این تیمارهای پالایشی بترتیب 41 و 39 درصد غلظت ترکیبات نفتی خاک را کاهش دادند. تیمار پالایشی B3 دارای بیشترین عملکرد ماده خشک اندام هوایی بود. با افزایش سطح آلودگی نفت خام، عملکرد ماده خشک اندام هوایی و ریشه کاهش یافت. سطوح آلاینده‌های نفتی (C1 و C2) به‌ترتیب 46 و 61 درصد عملکرد ماده خشک ریشه، 53 و 63 درصد عملکرد ماده خشک اندام هوایی را کاهش دادند. بیشترین میزان تنفس میکروبی در تیمارهای پالایشی B3 و B4 مشاهده گردید. در هر سه سطح آلودگی اختلاف میزان تنفس میکروبی در تیمارهای پالایشی B1 و B2 با تیمار شاهد، معنی­دار نبود.


 

جزئیات مقاله

کلمات کلیدی

Bioremediation, Oil pollution, Residual oil compounds, Phytoremediation

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ارجاع به مقاله
نعمتیا., گلچینا., & قویدلا. (2019). بررسی اثرات کاربرد توام گیاه پالایی و زیست پالایی در یک خاک آلوده به نفت خام . آب و خاک, 33(4), 579-590. https://doi.org/10.22067/jsw.v0i0.76812
نوع مقاله
علمی - پژوهشی