کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10372655 | 877769 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Removal of chromium ions from wastewater by duckweed, Lemna minor L. by using a pilot system with continuous flow
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
The aim of this study was to determine the ability of Lemna minor to remove Cr (VI) ions from wastewater in a continuous flow pond system. This system was used to simulate a wastewater treatment pond and a natural wetland as habitat of plants. In order to find optimal conditions for chromium removal, ponds were operated with aqueous solutions having different pH (4.0-7.0) and chromium concentration of 0.25Â mgCr+6/L, then plants were exposed to different chromium concentrations (0.25-5.0Â mgCr+6/L) at pH 4.0. Chromium concentrations, both in biomass and wastewater, were measured and removal efficiency was determined throughout water flow. Growth factors such as growth rates, chlorophyll contents and dry/fresh weight ratios of plants were also determined to measure toxic effects of chromium. The percentages of chromium uptake (PMU) and bioconcentration factors (BCF) were calculated for each run. The highest accumulated chromium concentration (4.423Â mgCr/g) was found in plants grown in the first chamber of pond operated at pH 4.0 and 5.0Â mgCr/L, while the minimum accumulated chromium concentration (0.122Â mgCr/g) was in plants grown in the last chamber of pond operated at pH 4.0 and 0.25Â mgCr+6/L.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 263, Part 2, 15 December 2013, Pages 486-492
Journal: Journal of Hazardous Materials - Volume 263, Part 2, 15 December 2013, Pages 486-492
نویسندگان
Y. Uysal,