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تجمع فلزات سنگین سرب و نیکل در برگ و خاک گونه‌های برهان و کنوکارپوس در شهر اهواز | ||
| نشریه جنگل و فرآورده های چوب | ||
| دوره 73، شماره 4، بهمن 1399، صفحه 379-387 اصل مقاله (686.3 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jfwp.2021.296621.1072 | ||
| نویسندگان | ||
| مریم رفعتی* 1؛ مریم محمدی روز بهانی2؛ هنا ناصری منفرد3 | ||
| 1استادیار گروه محیط زیست، دانشکدۀ فنی و مهندسی، واحد تهران شمال، دانشگاه آزاد اسلامی، تهران، ایران | ||
| 2استادیار گروه محیط زیست، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران | ||
| 3کارشناسی ارشد محیط زیست، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران | ||
| چکیده | ||
| در این پژوهش تجمع فلزات سنگین سرب و نیکل در برگ درخت برهان (Albizia lebbeck (L.) Benth) و درختچۀ کنوکارپوس (Conocarpus erectus L.) در فضای سبز شهری بررسی شد. بدین منظور، سه منطقه با شدت ترافیک کم و سه منطقه با شدت ترافیک زیاد در شهر اهواز انتخاب و نمونه‌هایی تصادفی از برگ (از ارتفاع 2 تا 3 متر از سطح زمین) و خاک در پای هر گونه (عمق صفر تا 10 سانتی‌متر) در مناطق تحت بررسی جمع‌آوری شد. براساس نتایج، غلظت فلزات سرب و نیکل در برگ دو گونه در مناطق کم‌ترافیک دارای اختلاف معنی‌دار بود که در مورد سرب، غلظت این فلز در برگ کنوکارپوس به‌طور معنی‌داری بیشتر از برهان بود، اما غلظت نیکل در برگ برهان به‌طور معنی‌داری بیشتر از کنوکارپوس بود. غلظت فلزات سرب و نیکل در خاک پای هر دو گونه نیز در مناطق پرترافیک به‌صورت معنی‌داری بیشتر از مناطق کم‌ترافیک حاصل شد. مقدار فاکتور تجمع زیستی فلز سرب در هر دو گونه کمتر از 1، و دربارۀ فلز نیکل، میانگین هر دو گونه بیشتر از 1 به‌دست آمد که نشان می‌دهد گونه‌های مذکور قادر به استخراج فلز نیکل از خاک هستند. در یک جمع‌بندی می‌توان بیان کرد که با توجه به یافته‌های این پژوهش، کنوکارپوس دارای قابلیت بیشتری در جذب نیکل نسبت به برهان است و می‌تواند در پروژه‌های گیاه‌پالایی در مناطق مشابه به‌کار گرفته شود. | ||
| کلیدواژه‌ها | ||
| آلاینده؛ تجمع زیستی؛ ترافیک؛ گیاه‌پالایی؛ Albizia lebbeck؛ Conocarpus erectus | ||
| عنوان مقاله [English] | ||
| Accumulation of heavy metals (lead and nickel) by the soil and leaves of Albizia lebbeck and Conocarpus erectus from the city of Ahwaz | ||
| نویسندگان [English] | ||
| Maryam Rafati1؛ Maryam Mohammadi Roozbahani2؛ Hona Naseri Monfared3 | ||
| 1Assist., Prof., of Environment, Technical and Engineering Faculty, North Tehran Branch, Islamic Azad university, Tehran, I.R. Iran. | ||
| 2Assist., Prof., of Department of Environment, Ahvaz Branch, Islamic Azad University, Ahvaz, I.R. Iran. University, Ahvaz, I.R. Iran | ||
| 3M.Sc. Graduated of Environment, Ahvaz Branch, Islamic Azad University, Ahvaz, I.R. Iran. | ||
| چکیده [English] | ||
| In this study, the accumulation of heavy metals included lead and nickel in Albizia lebbeck ((L.) Benth) tree, and Conocarpus erectus (L.) shrubin urban green spacewere investigated. To this, two areas with low and high traffic intensity with three replications were selected in Ahwaz, and random samples were collected from tree leaves (from 2 to 3 meters height above the ground level) and soil at the bottom of the species (depth 0 to 10 cm). The results showed that in the low traffic area, the concentrations of both heavy metals in two species were significantly different, in the case of lead, the concentration of this metal in the leaf of C. erectus was significantly higher than that of A. lebbeck, but the concentration of nickel in the leaf of A. lebbeck was significantly higher than that of C. erectus. Concentrations of lead and nickel in the soil of both species in the high traffic areas were significantly higher than the low traffic areas. The bioconcentration factor for the lead metal in both species was less than 1; But, for nickel metal, the mean of bioconcentration factor for both species is greater than 1; indicating that the two species are able to extract nickel from the soil. In summary, it can be stated that according to the findings of this study, C. erectus is more capable of absorbing nickel than Albizia lebbeck and can be used in phytoremediation projects in similar areas. | ||
| کلیدواژه‌ها [English] | ||
| Albizia lebbeck, Bioconcentration, Conocarpus erectus, Phytoremediation, Pollutant, Traffic | ||
| مراجع | ||
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