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اثر اسید سیتریک، نیتریلو تری استیک اسید و پلی اکریل آمید آنیونی بر گیاه‌پالایی نیکل به وسیله ذرت و آفتابگردان | ||
| تحقیقات آب و خاک ایران | ||
| مقاله 13، دوره 50، شماره 4، شهریور 1398، صفحه 933-921 اصل مقاله (755.82 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ijswr.2018.254627.667878 | ||
| نویسندگان | ||
| الهام محبی نجم آبادی* 1؛ امیر فتوت2؛ اکرم حلاج نیا3 | ||
| 1دانشجوی کارشناسی ارشد، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران | ||
| 2استاد، گروه خاکشناسی، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران | ||
| 3استادیار، گروه خاکشناسی، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران | ||
| چکیده | ||
| آلودگی خاک از معضلات مهم جوامع امروزی بوده که یکی از آلاینده‌های جدی در این زمینه نیکل می‌باشد. گیاه‌پالایی از جمله روش‌های پیشنهادی است که با انباشت آلاینده در گیاهان، خروج آن‌ها را از خاک‌های آلوده امکان‌پذیر می‌سازد. در مورد آلاینده‌های فلزات سنگین استفاده از عوامل کلات‌کننده در خاک می‌تواند کارآیی این روش را افزایش دهد. هدف این مطالعه بررسی گیاه‌پالایی نیکل از خاک به وسیله گیاه ذرت و آفتابگردان در حضور دو سطح اسید سیتریک (CA) (5 و 10 میلی‌مول بر کیلوگرم خاک)، دو سطح نیتریلو تری استیک اسید (NTA) (5/2 و 5 میلی‌مول بر کیلوگرم خاک) و دو سطح آنیون پلی اکریل آمید (APAM) (07/0 و 14/0 گرم بر کیلوگرم خاک) و تیمار شاهد بدون اعمال کلات، می‌باشد. این آزمایش به صورت طرح کاملاً تصادفی با سه تکرار در خاک آلوده شده به نیکل (200 میلی‌گرم بر کیلوگرم خاک از منبع نیترات نیکل) در شرایط گلخانه انجام گرفت. نتایج نشان داد که مؤثرترین کلات در افزایش عملکرد ذرت (ارتفاع، وزن تر، وزن خشک اندام هوایی و وزن خشک ریشه) تیمار NTA با غلظت 5 میلی‌مول بر کیلوگرم خاک بوده و بیشترین میزان افزایش عملکرد آفتابگردان نسبت به تیمار شاهد با اعمال کلات CA به دست آمد. NTA در غلظت زیاد بیشترین تأثیر را در افزایش فراهمی نیکل، جذب نیکل در اندام هوایی و جذب کل در هردو گیاه نسبت به دو تیمار CA و APAM داشت. بنابراین استفاده از گیاه ذرت و کاربرد NTA در غلظت زیاد توانست باعث تجمع بیشتر نیکل، افزایش فاکتور انتقال و پالایش در گیاه شود. | ||
| کلیدواژه‌ها | ||
| گیاه‌پالایی؛ فلزات سنگین؛ کلات؛ فاکتور انتقال؛ فاکتور پالایش | ||
| عنوان مقاله [English] | ||
| Effect of Citric Acid, Nitrilotriacetic acid and Anion Polyacrylamide on Phytoremediation of Nickel by Maize and Sunflower | ||
| نویسندگان [English] | ||
| elham mohebbi najmabadi1؛ amir fotovat2؛ Akram Halajnia3 | ||
| 1MSc. Student, Department of Soil Science, Faculty of Agriculture, Ferdowsi University, Mashhad, Iran | ||
| 2Professor, Department of Soil Science, Faculty of Agriculture, Ferdowsi University, Mashhad, Iran | ||
| 3Assistant Professor, Department of Soil Science, Faculty of Agriculture, Ferdowsi University, Mashhad, Iran | ||
| چکیده [English] | ||
| Soil contamination is one of the most important problems of modern societies. One of the serious pollutants in this area is nickel. Phytoremediation is one of the proposed methods that allow pollutants to be removed from the contaminated soils with pollutant accumulation in plants. In the case of heavy metal contamination, the use of soil chelating agents can increase the efficiency of this method. The aim of this study was to investigate the uptake of nickel from soil by maize (Zea maize) and sunflower (Helianthus annuus) in the presence of two levels of citric acid (5 and 10 mmol kg-1 soil), two levels of nitrilotriacetic acid (NTA) (2.5 and 5 mmol kg-1 soil) and two levels of anion polyacrylamide (APAM) (0.07 and 0.14 g kg-1 soil). Control treatment was performed without chelate. This experiment was conducted as a completely randomized design with three replications in soils contaminated with nickel (200 mg Ni kg-1 soil, added as Ni (NO3)2) under greenhouse conditions. The results showed that the most effective chelate in increasing the yield of maize (plant height, fresh and dry weight of shoot and root) was NTA chelate at its highest concentration. The highest increase of sunflower yield was obtained by applying CA chelate. NTA at high concentrations had the greatest effect on nickel available, nickel accumulation of shoot and total absorption in both plants compared to CA and APAM treatments. Based on the results, the use of maize and application of NTA at highest concentrations resulted a higher accumulation of nickel and increased transfer and refinement factors in the proposed plants. | ||
| کلیدواژه‌ها [English] | ||
| Phytoremediation, Heavy metals, Chelat, Translocation factor, Refinement factor | ||
| مراجع | ||
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