کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4425285 1309098 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of activated carbon amendment on the accumulation and elimination of PCBs in the earthworm Eisenia fetida
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Influence of activated carbon amendment on the accumulation and elimination of PCBs in the earthworm Eisenia fetida
چکیده انگلیسی

In this study we investigated the use of activated carbon (AC) as a soil amendment for reducing bioavailability of polychlorinated biphenyls (PCBs) to the earthworm Eisenia fetida. Artificial soil was contaminated with PCBs and used in bioaccumulation experiments fresh or after aging for 19 months. PCB bioaccumulation in earthworms was reduced by 68% when AC was placed as a layer without mixing and by 94% when AC was manually mixed into the soil. Aging of the same AC mixed soil for 19 months resulted in an overall reduction of 99% in PCB biouptake. AC-treated aged soil also showed two orders of magnitude lower equilibrium aqueous concentrations of PCBs compared to untreated aged soils. The findings from this study indicate that application of engineered sorbents like AC to PCB impacted soils may greatly reduce PCB uptake at the base of the terrestrial food chain.

Figure optionsDownload as PowerPoint slideHighlights
► Activated carbon studied as a sorbent for PCB impacted unsaturated soil.
► Bioaccumulation of PCB greatly reduced in earthworms after carbon amendment.
► Aging of the activated carbon amended soil further reduced bioaccumulation.
► Activated carbon can be used for in-situ stabilization of PCB impacted soil.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 159, Issue 12, December 2011, Pages 3763–3768
نویسندگان
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