scholarly journals Acute Toxicity Comparison of Single-Walled Carbon Nanotubes in Various Freshwater Organisms

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Eun Kyung Sohn ◽  
Young Shin Chung ◽  
Seyed Ali Johari ◽  
Tae Gyu Kim ◽  
Jin Kwon Kim ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Acute Toxicity ◽  
Aquatic Toxicity ◽  
Single Walled Carbon Nanotubes ◽  
Freshwater Microalgae ◽  
Single Walled Carbon ◽  
Freshwater Organisms ◽  
Classification And Labeling ◽  
Median Effective Concentration ◽  
Walled Carbon Nanotubes

While the commercialization of single-walled carbon nanotubes (SWCNTs) is rapidly expanding, the environmental impact of this nanomaterial is not well understood. Therefore, the present study evaluates the acute aquatic toxicity of SWCNTs towards two freshwater microalgae (Raphidocelis subcapitata and Chlorella vulgaris), a microcrustacean (Daphnia magna), and a fish (Oryzias latipes) based on OECD test guidelines (201, 202, and 203). According to the results, the SWCNTs inhibited the growth of the algae R. subcapitata and C. vulgaris with a median effective concentration (EC50) of 29.99 and 30.96 mg/L, respectively, representing “acute category 3” in the Globally Harmonized System (GHS) of classification and labeling of chemicals. Meanwhile, the acute toxicity test using O. latipes and D. magna did not show any mortality/immobilizing effects up to a concentration of 100.00 mg/L SWCNTs, indicating no hazard category in the GHS classification. In conclusion, SWCNTs were found to induce acute ecotoxicity in freshwater microalgae, yet not in D. magna and medaka fish.

Acute toxicity of a mixture of copper and single-walled carbon nanotubes toDaphnia magna

10.1002/etc.8 ◽  
2010 ◽  
Vol 29 (1) ◽  
pp. 122-126 ◽  
Author(s):  
Ki T. Kim ◽  
Stephen J. Klaine ◽  
Sijie Lin ◽  
Pu C. Ke ◽  
Sang D. Kim
Keyword(s):  
Carbon Nanotubes ◽  
Acute Toxicity ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Purity Evaluation of Single-Walled Carbon Nanotubes Using Thermogravimetric Analysis

2013 ◽  
Vol 51 (2) ◽  
pp. 137-144
Author(s):  
Naesung Lee ◽  
Jeung Choon Goak ◽  
Tae Yang Kim ◽  
Jongwan Jung ◽  
Young-Soo Seo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermogravimetric Analysis ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Purity Evaluation ◽  
Walled Carbon Nanotubes

Hybrid Bioactive Hydrogels Containing Single-Walled Carbon Nanotubes Covalently Integrated via Strain-Promoted Azide-Alkyne Cycloaddition

2012 ◽  
Vol 2 (2) ◽  
pp. 200-209 ◽  
Author(s):  
Jurgen Bachl ◽  
Thimo Huber ◽  
Dennis Kuhbeck ◽  
Eva-Maria Schon ◽  
Gabriele Brunner ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

scholarly journals Thermoelectric Properties of Thin Films from Sorted Single-Walled Carbon Nanotubes

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3808 ◽  
Author(s):  
Blazej Podlesny ◽  
Bogumila Kumanek ◽  
Angana Borah ◽  
Ryohei Yamaguchi ◽  
Tomohiro Shiraki ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermoelectric Properties ◽  
Large Scale ◽  
Single Walled Carbon Nanotubes ◽  
Parent Material ◽  
Free Standing ◽  
Two Phase ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes ◽  
Aqueous Two Phase Extraction

Single-walled carbon nanotubes (SWCNTs) remain one of the most promising materials of our times. One of the goals is to implement semiconducting and metallic SWCNTs in photonics and microelectronics, respectively. In this work, we demonstrated how such materials could be obtained from the parent material by using the aqueous two-phase extraction method (ATPE) at a large scale. We also developed a dedicated process on how to harvest the SWCNTs from the polymer matrices used to form the biphasic system. The technique is beneficial as it isolates SWCNTs with high purity while simultaneously maintaining their surface intact. To validate the utility of the metallic and semiconducting SWCNTs obtained this way, we transformed them into thin free-standing films and characterized their thermoelectric properties.

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