اثر آبیاری با پساب تصفیه‌شده مغناطیسی بر خصوصیات شیمیایی و فلزات سنگین خاک

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی آب، دانشکده مهندسی زارعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران.

2 گروه مهندسی آبیاری و آبادانی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران.

چکیده

با توجه با افزایش روزافزون جمعیت و محدودیت منابع غذایی، سهم دسترسی به منابع آب و خاک مطلوب کشاورزی رو به کاهش بوده و بشر را با چالش بزرگ امنیت غذایی و بحران­های منطقه­ای و بین­المللی روبه­رو کرده است. سمیت فلزات سنگین در گیاهان سبب بروز اختلالاتی در گیاه شده که در نهایت ممکن است سبب کاهش رشد گیاه گردد. یکی از روش­هایی که می­توان برای اصلاح خاک استفاده نمود، کاربرد آب مغناطیسی است. در این پژوهش به بررسی تأثیر استفاده از پساب تصفیه‌شده مغناطیسی بر خصوصیات شیمیایی و ردیابی فلزات سنگین خاک پرداخته شد. بدین منظور، آزمایشی به‌صورت فاکتوریل در قالب طرح بلوک کامل تصادفی با سه تکرار در سال 1399 در شهرستان بابلسر انجام شد. تیمارها شامل آبیاری با آب چاه (W1)، آبیاری با اختلاط 25 درصد پساب و 75 درصد آب چاه (W2)، آبیاری با اختلاط 50 درصد پساب و 50 درصد آب چاه (W3)، آبیاری با اختلاط 75 درصد پساب و 25 درصد آب چاه (W4)، آبیاری با 100 درصد پساب (W5) در شرایط اعمال میدان مغناطیسی (I1) و بدون میدان مغناطیسی (I2) بود. نتایج نشان داد که اثر نوع آبیاری و اختلاط آب و پساب بر هدایت الکتریکی، املاح و فلزات سنگین خاک در عمق­های مختلف در سطح احتمال 1 درصد معنی­دار شد. به طور متوسط، آبیاری با آب مغناطیسی باعث کاهش 43/30 درصدی هدایت الکتریکی، کاهش 25/35 درصدی سرب و کاهش 11/56 درصدی مدار کادمیوم در پروفیل خاک شد. در تیمارهای با درصد اختلاط بیشتر پساب، مقدار املاح در عمق­های مختلف خاک افزایش یافت که به دلیل مقادیر بیشتر عناصر به ویژه فلزات سنگین موجود در پساب مورد استفاده بود. بنابراین با استفاده از فن­آوری مغناطیسی می­توان برای کاهش املاح و فلزات سنگین خاک، شرایط را برای کشت بهتر از لحاظ کاهش سمیت گیاهان به جذب فلزات سنگین مهیا نمود.

کلیدواژه‌ها


عنوان مقاله [English]

The Effect of Irrigation with Magnetically Treated Effluent on Chemical Properties and Soil Heavy Metals

نویسندگان [English]

  • Mojtaba Khoshravesh 1
  • Seyedeh Mahsa Hosseini 1
  • Masoud Pourgholam-Amiji 2
1 1- Department of Water Engineering, Faculty of Agricultural Engineering, Sari Agricultural Sciences and Natural Resources University, Sari, Iran.
2 Department of Irrigation and Reclamation Engineering, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
چکیده [English]

Increase in population and limitation of food resources, leads to decline accessing to agricultural water and soil resources and faced human beings with the great challenge of food security and regional and international crises. Disorders in the plant due to heavy metal toxicity in plants may eventually reduce plant growth. One of the methods that can be applyed to remediate the soil is using of magnetic water. In this study, the effect of using magnetically treated effluent on the chemical properties and traceability of soil heavy metals was investigated. For this purpose, a factorial experiment was conducted in a randomized complete block design with three replications in 2020 at Babolsar city. Treatments include: irrigation with well water (W1), irrigation with mixing 25% of effluent and 75% of well water (W2), irrigation with the mixing of 50% of effluent and 50% of well water (W3), irrigation with mixing of 75% of effluent and 25% of water Well (W4), irrigation with 100% effluent (W5) under magnetic field (I1) and without magnetic field (I2). The results showed that the effect of irrigation type and water and effluent mixing on electrical conductivity, solutes, and heavy metals in the soil at different depths was significant at 1% probability level. On average, irrigation with magnetic water reduced electrical conductivity by 30.43%, lead by 35.25%, and cadmium by 56.11% in the soil profile. In treatments with higher effluent mixing percentages, the number of solutes increased in different soil depths, which was due to higher amounts of elements, especially heavy metals in the effluent. Therefore, by using magnetic technology to reduce the solutes and heavy metals in the soil, provided the conditions for better cultivation in terms of reducing the toxicity of plants due to less absorbtion of heavy metals.

کلیدواژه‌ها [English]

  • Soil remediation
  • lead
  • Cadmium
  • Water and Effluent Mixing
  • magnetic field
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