کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4427666 1309165 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Acute toxicity of heavy metals towards freshwater ciliated protists
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Acute toxicity of heavy metals towards freshwater ciliated protists
چکیده انگلیسی

The acute toxicity of five heavy metals to four species of freshwater ciliates (Colpidium colpoda, Dexiotricha granulosa, Euplotes aediculatus, and Halteria grandinella) was examined in laboratory tests. After exposing the ciliates to soluble compound of cadmium, copper, chromium, lead, and nickel at several selected concentrations, the mortality rate was registered and the LC50 values (with 95% confidence intervals) were calculated. Large differences appeared in sensitivities of the four species to the metals. H. grandinella showed the highest sensitivity for cadmium (0.07 mg l−1, LC50) and lead (0.12 mg l−1, LC50), whilst E. aediculatus showed the highest sensitivity for nickel (0.03 mg l−1, LC50). The comparison with data obtained with other species indicate that Halteria grandinella and Euplotes aediculatus are excellent and convenient bioindicator for evaluating the toxicity of waters and wastewaters polluted by heavy metals. The short time (24 h) and simplicity of the test procedure enable this test to be used in laboratory studies.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 141, Issue 1, May 2006, Pages 1–7
نویسندگان
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