کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4425076 1619208 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Concentration responses to organochlorines in Phragmites australis
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Concentration responses to organochlorines in Phragmites australis
چکیده انگلیسی

Phragmites australis shows potential for the phytoremediation of chlorinated chemicals. Also there has been some attempt to determine the phytotoxic effects of organochlorines (OC). This study reports for lindane (HCH), monochlorobenzene (MCB), 1,4-dichlorobenzene (DCB) and 1,2,4-trichlorobenzene (TCB), a no-observed-effect-concentration (NOEC7d) that was 1000–300,000 times higher than environmental concentrations. Nevertheless, the combined OC mixture (NOEC7d level of each congener) induced a synergistic toxic effect, causing a severe drop (70%) in chlorophyll concentration. The mixture 0.2 mg L−1 MCB + 0.2 mg L−1 DCB + 2.5 mg L−1 TCB + 0.175 mg L−1 HCH, that was 15 times more concentrated than environmental OC mixture, did not cause phytotoxicity during 21 days. Antioxidant enzymes were affected immediately after the start of exposure (3 days), but the plants showed no signs of stress thereafter. These data suggest that environmental OC mixtures do not pose a significant risk to P. australis.


► We describe responses in Phragmites australis plants exposed to organochlorines (OC).
► In single-exposure, P. australis show tolerance to environmental OC concentrations.
► The joint OC mixture induced a synergistic toxic effect on macrophyte.
► The environmental OC mixtures show a negligible risk assessment for Phragmites.
► Phragmites can be a good candidate for phytoremediation of contaminated waters.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 164, May 2012, Pages 188–194
نویسندگان
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