نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار، گروه جنگلداری، دانشگاه صنعتی خاتم‌الانبیاء بهبهان، بهبهان، ایران

2 دانشجوی کارشناسی ارشد گروه جنگلداری، دانشگاه صنعتی خاتم‌الانبیاء بهبهان، بهبهان، ایران

3 استادیار، گروه مرتع و آبخیزداری، دانشکده کشاورزی، دانشگاه فسا، فسا، ایران

4 استادیار، گروه محیط زیست، دانشکده منابع طبیعی و کویرشناسی، دانشگاه یزد، یزد، ایران

چکیده

خاک‌های آﻟﻮده ﺑﻪ ﻧﻔﺖ ﺧﺎم ﯾﮏ ﺗﻬﺪﯾﺪ اﺳﺎﺳﯽ ﺑﺮای محیط‌زیست ﻣﺤﺴﻮب می‌شوند. هدف از پژوهش حاضر، بررسی کاهش هیدروکربن­های کل نفتی (Total Petroleum Hydrocarbon)، و فلزات سنگین نیکل و وانادیم به­وسیلۀ گونه کهور (Prosopis juliflora) تحت تیمارهای مختلف کمپوست و بیوچار است. نهال­های یک‌ساله کهور در گلدان­های حاوی خاک­های آلوده به لجن نفتی کشت شدند. این گلدان­ها شامل کمپوست و بیوچار با نسبت 1 و 2% وزنی بودند. همچنین دو تیمار شاهد یکی بدون کهور و دیگری با کهور نیز در نظر گرفته شد. این آزمایش در قالب طرح کاملاً تصادفی در 3 تکرار اجرا شد. بعد از اتمام دوره شش‌ماهه کشت، از خاک گلدان­ها نمونه­برداری و مقدار TPH، نیکل و وانادیوم موردسنجش قرار گرفت. نتایج نشان داد که کم­ترین مقدار TPH در تیمار کمپوست 2% (ppm 63/10) مشاهده شد که دارای اختلاف معنی­داری با دیگر تیمارها بود. بیش­ترین مقدار آن در شاهد بدون کهور (ppm 57/22) مشاهده شد. بیش­ترین مقدار وانادیوم در تیمار شاهد (mg/kg 50/69) مشاهده شد. تیمارهای کمپوست 2% (mg/kg 66/47) کم­ترین مقدار وانادیوم را داشتند. مقایسه بین تیمارهای مورد برسی نشان داد که بین تیمارهای کمپوست 1 (mg/kg 17/117) و 2% (mg/kg 00/118) و بیوچار 2% (mg/kg 67/116) تفاوت معنی­داری وجود نداشت و بیش­ترین کاهش نیکل مربوط به این تیمارها بود، که می­تواند ناشی از تأثیرات مثبت اصلاح خصوصیات فیزیکی و شیمایی خاک در بهبود گیاه‌پالایی باشد. بنابراین، استفاده از بیوچار و کمپوست می­تواند توان گیاه­پالایی کهور را افزایش دهد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Phytoremediation of Contaminated Soils to Sludge of Oil Reservoirs using Prosopis juliflora (Sw.) DC.

نویسندگان [English]

  • Mostafa Moradi 1
  • Zohreh Barazionnezhad 2
  • Reza Basiri 1
  • Esfandiar Jahantab 3
  • Gholam Hosein Moradi 4

1 Assoc. Professor, Department of Forestry, Faculty of Natural Resources, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran

2 M.Sc. Student, Department of Forestry, Faculty of Natural Resources, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran

3 Assist. Professor, Department of Range and Watershed Management, Faculty of Agriculture, University of Fasa, Fasa, Iran

4 Assist. Professor, Department of Environmental Science, School of Natural Resources & Desert Studies, Yazd University, Yazd, Iran

چکیده [English]

Oil contaminated soil is a vital threat to the environment. The aim of the present research was to investigate the total petroleum hydrocarbon (TPH), and heavy metals of nickel and vanadium reduction using Prosopis juliflora, under different treatments of biochar and compost in pots. One-year-old P. juliflora seedlings were planted in pots containing oil sludge. The pots included 1 and 2% of compost and biochar. Furthermore, two control treatments including with and without P. juliflora were used for the study. This study was conducted in the complete randomized plot sampling with three replications. After six months, soil samples were taken from the pots and transferred to the laboratory. Then, the concentration of TPH, nickel, and vanadium was determined. The results indicated that the least TPH belonged to the compost 2% treatment (10.63 ppm), which was significantly different compared with other studied treatments. The highest value belonged to the control treatment without P. juliflora (22.57 ppm). The highest value of vanadium belonged to the control treatment (69.50 mg/kg). Compost 2% had the least values of vanadium (47.66 mg/kg). Comparison between treatments showed no significant differences among compost 1% (117.17 mg/kg), compost 2% (118.00 mg/kg), and biochar 2% (116.67 mg/kg). The highest reduction of nickel was observed within the mentioned treatments. Therefore, using biochar and compost can improve the phytoremediation capacity of P. juliflora.

کلیدواژه‌ها [English]

  • Biochar
  • Compost
  • Phytoremediation
  • Total Petroleum Hydrocarbons
  • Vanadium
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