کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4432300 1619929 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Elimination of natural uranium and 226Ra from contaminated waters by rhizofiltration using Helianthus annuus L.
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Elimination of natural uranium and 226Ra from contaminated waters by rhizofiltration using Helianthus annuus L.
چکیده انگلیسی

The elimination of natural uranium and 226Ra from contaminated waters by rhizofiltration was tested using Helianthus annuus L. (sunflower) seedlings growing in a hydroponic medium. Different experiments were designed to determine the optimum age of the seedlings for the remediation process, and also to study the principal way in which the radionuclides are removed from the solution by the sunflower roots. In every trial a precipitate appeared which contained a major fraction of the natural uranium and 226Ra. The results indicated that the seedlings themselves induced the formation of this precipitate. When four-week-old seedlings were exposed to contaminated water, a period of only 2 days was sufficient to remove the natural uranium and 226Ra from the solution: about 50% of the natural uranium and 70% of the 226Ra were fixed in the roots, and essentially the rest was found in the precipitate, with only very small percentages fixed in the shoots and left in solution.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volume 393, Issues 2–3, 15 April 2008, Pages 351–357
نویسندگان
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