Terrestrial Trophic Transfer of Bulk and Nanoparticle La2O3 Does Not

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Terrestrial trophic transfer of bulk and nanoparticle La2O3 does not depend on particle size Roberto De La Torre Roche, Alia Servin, Joseph Hawthorne, Baoshan Xing, Lee A. Newman, Xingmao Ma, Guangcai Chen, and Jason C. White Environ. Sci. Technol., Just Accepted Manuscript • DOI: 10.1021/acs.est.5b02583 • Publication Date (Web): 10 Sep 2015 Downloaded from http://pubs.acs.org on September 13, 2015

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Terrestrial trophic transfer of bulk and nanoparticle La2O3 does not

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depend on particle size

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Roberto De la Torre Roche1, Alia Servin1, Joseph Hawthorne1, Baoshan Xing2, Lee A. Newman3, Xingmao Ma4, Guangcai Chen3,5, and Jason C. White1*

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Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, New Haven, CT 06504, USA

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Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, USA

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Department of Environmental and Forest Biology, SUNY - College of Environmental Science and Forestry, Syracuse, NY 13210 USA

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Zachry Department of Civil Engineering, Texas A&M University, College Station, TX, 77843 USA 5

Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang, Zhejiang 311400, China

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Abstract- The bioaccumulation and trophic transfer of bulk and nanoparticle (NP) La2O3 from

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soil through a terrestrial food chain was determined. To investigate the impact of growth

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conditions, lettuce (Lactuca sativa) was grown in 350 or 1200 g of bulk/NP amended soil. Leaf

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tissues were fed to crickets (Acheta domesticus) or darkling beetles (Tenebrionoidea); select

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crickets were fed to mantises. In the small pot (350 g), La2O3 exposure reduced plant biomass by

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23-30% and La tissue content did not differ with particle size. In the large pot (1200 g), biomass

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was unaffected by exposure and La content in the tissues were significantly greater with bulk

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particle treatment. Darkling beetles exposed to bulk and NP La2O3-contaminated lettuce

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contained La at 0.18 and 0.08 mg/kg; respectively (significantly different, P