TY - JOUR
T1 - Determination of uptake, accumulation, and stress effects in corn (Zea mays L.) grown in single-wall carbon nanotube contaminated soil
AU - Cano, Amanda M.
AU - Kohl, Kristina
AU - Deleon, Sabrina
AU - Payton, Paxton
AU - Irin, Fahmida
AU - Saed, Mohammad
AU - Shah, Smit Alkesh
AU - Green, Micah J.
AU - Cañas-Carrell, Jaclyn E.
N1 - Funding Information:
These studies were funded under the National Science Foundation (NSF) Chemical, Bioengineering, Environmental, and Transport Systems (CBET) (grant # 1133250 ). Nancy Layland is acknowledged for her help with the caring for the plants of these studies. Jesus Cano is also acknowledged for his help in the mixing of the SWNT soil.
Publisher Copyright:
© 2016 Elsevier Ltd.
PY - 2016/6/1
Y1 - 2016/6/1
N2 - Single-wall carbon nanotubes (SWNTs) are projected to increase in usage across many industries. Two studies were conducted using Zea L. (corn) seeds exposed to SWNT spiked soil for 40 d. In Study 1, corn was exposed to various SWNT concentrations (0, 10, and 100 mg/kg) with different functionalities (non-functionalized, OH-functionalized, or surfactant stabilized). A microwave induced heating method was used to determine SWNTs accumulated mostly in roots (0-24 μg/g), with minimal accumulation in stems and leaves (2-10 μg/g) with a limit of detection at 0.1 μg/g. Uptake was not functional group dependent. In Study 2, corn was exposed to 10 mg/kg SWNTs (non-functionalized or COOH-functionalized) under optimally grown or water deficit conditions. Plant physiological stress was determined by the measurement of photosynthetic rate throughout Study 2. No significant differences were seen between control and SWNT treatments. Considering the amount of SWNTs accumulated in corn roots, further studies are needed to address the potential for SWNTs to enter root crop species (i.e., carrots), which could present a significant pathway for human dietary exposure.
AB - Single-wall carbon nanotubes (SWNTs) are projected to increase in usage across many industries. Two studies were conducted using Zea L. (corn) seeds exposed to SWNT spiked soil for 40 d. In Study 1, corn was exposed to various SWNT concentrations (0, 10, and 100 mg/kg) with different functionalities (non-functionalized, OH-functionalized, or surfactant stabilized). A microwave induced heating method was used to determine SWNTs accumulated mostly in roots (0-24 μg/g), with minimal accumulation in stems and leaves (2-10 μg/g) with a limit of detection at 0.1 μg/g. Uptake was not functional group dependent. In Study 2, corn was exposed to 10 mg/kg SWNTs (non-functionalized or COOH-functionalized) under optimally grown or water deficit conditions. Plant physiological stress was determined by the measurement of photosynthetic rate throughout Study 2. No significant differences were seen between control and SWNT treatments. Considering the amount of SWNTs accumulated in corn roots, further studies are needed to address the potential for SWNTs to enter root crop species (i.e., carrots), which could present a significant pathway for human dietary exposure.
KW - Drought plant stress
KW - Microwave-induced heating
KW - Photosynthetic rate
KW - Single-wall carbon nanotube
UR - http://www.scopus.com/inward/record.url?scp=84960145472&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2016.02.093
DO - 10.1016/j.chemosphere.2016.02.093
M3 - Article
C2 - 26966810
AN - SCOPUS:84960145472
VL - 152
SP - 117
EP - 122
JO - Chemosphere
JF - Chemosphere
SN - 0045-6535
ER -