مقایسه کارائی ذرات آهن صفر ظرفیتی در اندازه نانو و میکرو در تجزیه علف کش آترازین در خاک

نوع مقاله : مقالات پژوهشی

نویسندگان

1 فردوسی مشهد

2 دانشکده کشاورزی دانشگاه فردوسی مشهد

چکیده

به منظور امکان سنجی پالایش آترازین در خاک در شرایط آزمایشگاهی و مقایسه آن با پودر آهن رایج آزمایشی با طرح فاکتوریل و با پایه کاملا تصادفی انجام گرفت. فاکتورهای مورد مطالعه، دو نوع پودر آهن در مقیاس میکرو و نانو و در چهار سطح 0، 1 ، 2 و 5 گرم در 100 گرم خاک آلوده به 30 میلی گرم آترازین بودند. نمونه گیری ها در بازه های زمانی یک روز، یک هفته و دو هفته انجام گرفت. پس از استخراج آترازین و قرائت آن توسط دستگاه HPLC، داده ها توسط نرم افزار Mstatc، آنالیز گردید. نتایج آنالیز داده ها نشان داد که سطوح اصلی آزمایش در سطح 01/0 دارای اختلاف معنا دار بودند. که اگر چه هر دو نوع پودر میکرو و نانو آهن صفر ظرفیتی آترازین را در خاک تجزیه کردند اما بین این دو تیمار اختلاف معنا داری وجود داشت و میزان تجزیه توسط نانو پودر آهن بیشتر بود. نانو پودر آهن توانست آترازین را به مقدار بیشتری از پودر آهن میکرو تجزیه نمایدو با افزایش مقدار پودر آهن در طی زمان سطوح پودر مصرفی دارای اختلاف معنا داری بودند و با افزایش مقدار پودر، میزان آترازین تجزیه شده نیز افزایش یافت. نتایج نشان داد استفاده از نانو پودر برای تجزیه آترازین در خاک کاملا قابل توصیه است.

کلیدواژه‌ها


عنوان مقاله [English]

Atrazine degradation in soil by using Zero Valent Iron Nanoparticles

نویسندگان [English]

  • yaser nikparast 1
  • Mohammad Hassan Rashed Mohassel 2
  • Reza Ghorbani 2
1 Ferdowsi university of Mashhad
2 Ferdowsi university of Mashhad
چکیده [English]

The feasibility of atrazine degradation with nano zero valent iron and it is comparison with iron powder was investigated. The experimental design was factorial with completely random design. Studied Factors were two types of soils, acidic and non-acidic, two types of iron powder, micro-and nano-scale at four concentrations, 0, 1, 2 and 5 grams in 100 grams of soil contaminated by 30 mg of atrazine. Sampling intervals were one day, one week and two weeks. After extraction of atrazine the concentration was measured by HPLC and data were analyzed by Mstatc software. The result showed that the main factors (Iron type, concentration and soil type) caused a significant difference. Although both types of micro-and nano iron powder were able to remediate atrazine in soil, but the differences between these two treatments was significant and the rate of decomposition by nano iron powder was higher. Atrazine degradation with zero valent iron nano particles was higher in acidic soil. The highest degradation rate was belonging to treatment with 5 grams of nano scale iron and the lowest observation was the control with no iron powder in non-acidic soil. It is concluded that the use of nano zero valent iron for atrazine degradation, especially in acidic soils is promising.

کلیدواژه‌ها [English]

  • : Zero Valent Iron
  • Herbicide degradation
  • Nano remediation
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