Testing the resistance of fullerenes to chemothermal oxidation used to isolate soots from environmental samples |
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Authors: | Flores-Cervantes D Xanat Bucheli Thomas D |
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Institution: | Agroscope Reckenholz-Tänikon Research Station ART, Reckenholzstrasse 191, 8046, Zürich, Switzerland |
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Abstract: | We tested the resistance of five different fullerenes (C60, C70, C76/78 mix, and C84) to chemothermal oxidation at 375 °C (CTO-375), a method that has been used and tested for quantifying black carbon (BC) and CNTs in soils and sediments. C60 survived CTO-375 the most (50%), while C70 was the fullerene with the lowest survival rate (<1%). Standard additions of C60 to soil and sediment reference materials yielded recoveries between 18 and 36%. Although lower than recoveries previously observed for soot and CNTs, these results demonstrate the capability of CTO-375 to partially isolate C60 from solid environmental matrices. Standard additions of C70, C76/78, and C84 yielded slightly higher survival rates when added to soil and sediment than in their pure form. These results indicate that the mineral matrices of these samples probably had a catalytic effect towards C60 and a protective effect towards C70, C76/78, and C84 during CTO-375. |
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Keywords: | CTO-375 Higher fullerenes Black carbon Carbon nanotubes C60 |
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