کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6330438 | 1619783 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Metal and nanoparticle occurrence in biosolid-amended soils
ترجمه فارسی عنوان
رخداد فلزات و نانوذرات در خاک های اصلاح شده بوسیدید
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کلمات کلیدی
نانومواد، تیتانیوم، مشخصات فلزی، خاک
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
Metals can accumulate in soils amended with biosolids in which metals have been concentrated during wastewater treatment. The goal of this study is to inspect agricultural sites with long-term biosolid application for a suite of regulated and unregulated metals, including some potentially present as commonly used engineered nanomaterials (ENMs). Sampling occurred in fields at a municipal and a privately operated biosolid recycling facilities in Texas. Depth profiles of various metals were developed for control soils without biosolid amendment and soils with different rates of biosolid application (6.6 to 74Â dry tons per hectare per year) over 5 to 25Â years. Regulated metals of known toxicity, including chromium, copper, cadmium, lead, and zinc, had higher concentrations in the upper layer of biosolid-amended soils (top 0-30Â cm or 0-15Â cm) than in control soils. The depth profiles of unregulated metals (antimony, hafnium, molybdenum, niobium, gold, silver, tantalum, tin, tungsten, and zirconium) indicate higher concentrations in the 0-30Â cm soil increment than in the 70-100Â cm soil increment, indicating low vertical mobility after entering the soils. Titanium-containing particles between 50Â nm and 250Â nm in diameter were identified in soil by transmission electron microscopy (TEM) coupled with energy dispersive x-ray spectroscopy (EDX) analysis. In conjunction with other studies, this research shows the potential for nanomaterials used in society that enter the sewer system to be removed at municipal biological wastewater treatment plants and accumulate in agricultural fields. The metal concentrations observed herein could be used as representative exposure levels for eco-toxicological studies in these soils.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volumes 485â486, 1 July 2014, Pages 441-449
Journal: Science of The Total Environment - Volumes 485â486, 1 July 2014, Pages 441-449
نویسندگان
Yu Yang, Yifei Wang, Paul Westerhoff, Kiril Hristovski, Virginia L. Jin, Mari-Vaughn V. Johnson, Jeffrey G. Arnold,