بررسی میزان جذب عناصر کادمیم، روی، مس، نیکل، آهن و سرب موجود در پساب بیمارستانی به‌روش گیاه‌پالایی توسط گیاه وتیور

نوع مقاله: مقاله پژوهشی

نویسندگان

1 مربی گروه علوم باغبانی، دانشکده کشاورزی و منابع طبیعی، دانشگاه خیلج فارس بوشهر،‌ بوشهر، ایران

2 استادیار گروه علوم باغبانی، دانشکده کشاورزی و منابع طبیعی، دانشگاه خلیج فارس بوشهر، بوشهر، ایران

3 کارشناس ارشد، پژوهشکده خلیج فارس، دانشگاه خلیج فارس بوشهر، بوشهر، ایران

چکیده

فاضلاب بیمارستانی یکی از انواع فاضلاب‌های شهری است که با توجه به منبع تولید آن ممکن است حاوی عوامل پاتوژن و میکروارگانیسم‌ها، انواع عوامل بیماری‌زای روده‌ای، باکتری‌یایی، ویروسی، عوامل انگلی و مواد سمی موجود در شیرابه پساب‌های بیمارستانی از جمله فلزات سنگین ‌باشند. در این پژوهش میزان جذب عناصر کادمیم، روی، مس، نیکل، آهن و سرب موجود در پساب بیمارستانی به‌روش گیاه‌پالایی، با استفاده از گیاه وتیور بررسی شد. به این منظور گیاه وتیور بر اساس طرح کاملاً تصادفی، در قالب 8 تیمار و 4 تکرار کشت و با ترکیب‌های مختلفی از آب معمولی و پساب بیمارستانی، به‌مدت 75 روز آبیاری شد. مطابق نتایج به‌دست آمده، بیشترین تجمع عناصر سرب، مس، روی، آهن، نیکل به‌ترتیب به میزان 244/9، 313/2، 3188/2، 3/2625 و 638/27 در قسمت ریشه گیاه و عنصر کادمیم به میزان 45/3 میکروگرم در گرم ماده خشک در خاکی که گیاه در آن کاشته شده بود، رخ داد و مقادیر خیلی کمی از عناصر سنگین در قسمت شاخ و برگ گیاه وتیور تجمع یافت. تجمع بیشتر فلزات مس، سرب، نیکل و روی در ریشه نسبت به اندام هوایی نشان‌دهنده مکانیسم تحمل گیاه در غلظت‌های بالای فلزات در خاک است. به‌طور کلی استفاده از گیاه وتیور به‌عنوان گزینه مؤثر در کاهش آلودگی پساب‌های بیمارستانی توصیه می‌شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Evaluation of Absorption of Cd, Zn, Pb, Ni, Fe, and Cu Present in Hospital Wastewater by Phytoremediation Using Vetiver Grass

نویسندگان [English]

  • Ali Dindarlou 1
  • Mohammad Hedayat 2
  • Asma Hosseini 3
1 . Instructor of Horticulture Sciences, College of Agriculture and Natural Resources, Persian Gulf University, Bushehr, Iran
2 Ass. Prof. of Horticulture Sciences, College of Agriculture and Natural Resources, Persian Gulf University, Bushehr, Iran
3 MSc Graduate, Persian Gulf Research Institute, Persian Gulf University, Bushehr, Iran
چکیده [English]

Hospital effluent is one type of urban wastewater that, due to its special source, may contain different pathogens and microorganisms, various intestinal disease agents, bacteria, viruses, sycophants, and toxic substances present in hospital wastewater latex including heavy metals. In this study, efforts have been made to evaluate the absorption of Cd, Zn, Cu, Ni, Fe, and Pb present in hospital wastewater by phytoremidiation. For the purposes of this study, the vetiver grass was cultivated in 8 treatments with 4 replications based on a completely randomized design and irrigated for 75 days with various combinations of normal water and hospital wastewater. Results showed that more of the Pb, Cu, Zn, Fe, and Ni (9.243, 2.313, 2.3188, 2625.3, and 27.638 mg of dry matter, respectively) was absorbed and collected in the root while Cd (3.45 mg of dry matter ) accumulated in the soil, and only trace amounts of heavy metals accumulated in the branches and leaves. The reason for the greater accumulation of Pb, Cu, Ni, and Zn in the root rather than in the aerial parts is the high tolerance of the vetiver grass to high heavy metal concentrations in soil. Based on the results of this study, the use of vetiver may be recommended for the removal of contaminants in hospital effluents.

کلیدواژه‌ها [English]

  • Wastewater
  • hospital wastewater
  • Phytoremediation
  • heavy metals
  • Vetiver

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