کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
576579 1453081 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Deposition of carbon nanotubes by a marine suspension feeder revealed by chemical and isotopic tracers
ترجمه فارسی عنوان
قرار دادن نانولوله های کربنی توسط یک فیدر تعلیق دریایی با استفاده از ردیاب های شیمیایی و ایزوتوپ ها
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
چکیده انگلیسی
Carbon nanotubes (CNTs) are one of the few truly novel nanomaterials and are being incorporated into a wide range of products, which will lead to environmental release and potential ecological impacts. We examined the toxicity of CNTs to marine mussels and the effect of mussels on CNT fate and transport by exposing mussels to 1, 2, or 3 mg CNTs l−1 for four weeks and measuring mussel clearance rate, shell growth, and CNT accumulation in tissues and deposition in biodeposits. We used metal impurities and carbon stable isotope ratios of the CNTs as tracers of CNT accumulation. Mussels decreased clearance rate of phytoplankton by 24% compared with control animals when exposed to CNTs. However, mussel growth rate was unaffected by CNT concentrations up to 3 mg l−1. Based on metal concentrations and carbon stable isotope values, mussels deposited most CNTs in biodeposits, which contained >110 mg CNTs g−1 dry weight, and accumulated about 1 mg CNTs g−1 dry weight of tissue. We conclude that extremely high concentrations of CNTs are needed to illicit a toxic response in mussels but the ability of mussels to concentrate and deposit CNTs in feces and pseudofeces may impact infaunal organisms living in and around mussel beds.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 279, 30 August 2014, Pages 32-37
نویسندگان
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