文献类型：期刊文献

英文题名：Terrestrial Trophic Transfer of Bulk and Nanoparticle La2O3 Does Not Depend on Particle Size

作者：Roche, Roberto De la Torre[1] Servin, Alia[1] Hawthorne, Joseph[1] Xing, Baoshan[2] Newman, Lee A.[3] Ma, Xingmao[4] Chen, Guangcai[3,5] White, Jason C.[1]

第一作者：Roche, Roberto De la Torre

通信作者：White, JC[1]

机构：[1]Connecticut Agr Expt Stn, Dept Analyt Chem, New Haven, CT 06504 USA;[2]Univ Massachusetts, Stockbridge Sch Agr, Amherst, MA 01003 USA;[3]SUNY Coll Environm Sci & Forestry, Dept Environm & Forest Biol, Syracuse, NY 13210 USA;[4]Texas A&M Univ, Zachry Dept Civil Engn, College Stn, TX 77843 USA;[5]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Zhejiang, Peoples R China

年份：2015

卷号：49

期号：19

起止页码：11866-11874

外文期刊名：ENVIRONMENTAL SCIENCE & TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000362629100071)】；

基金：J.C.W. acknowledges USDA-AFRI (#2011-67006-30181), as well as Craig Musante and Katherine Alfiere for technical assistance.

语种：英文

外文关键词：Biochemistry - Digestive system - Histology - Lanthanum oxides - Nanoparticles - Particle size - Silicon compounds - Tissue

摘要：The bioaccumulation and trophic transfer of bulk and nanoparticle (NP) La2O3 from soil through a terrestrial food chain was determined. To investigate the impact of growth conditions, lettuce (Lactuca sativa) was grown in 350 or 1200 g of bulk/NP amended soil. Leaf tissues were fed to crickets (Acheta domesticus) or darkling beetles (Tenebrionoidea); select crickets were fed to mantises. In the small pot (350 g), La2O3 exposure reduced plant biomass by 23-30% and La tissue content did not differ with particle size. In the large pot (1200 g), biomass was unaffected by exposure and La content in the tissues were significantly greater with bulk particle treatment. Darkling beetles exposed to bulk and NP La2O3-contaminated lettuce contained La at 0.18 and 0.08 mg/kg; respectively (significantly different, P < 0.05). Crickets fed bulk or NP La2O3-exposed lettuce contained 0.53 and 0.33 mg/kg, respectively (significantly different, P < 0.05) with 48 h of depuration. After 7 d of depuration, La content did not differ with particle size, indicating that 48 h may be insufficient to void the digestive system. Mantises that consumed crickets from bulk and NP-exposed treatments contained La at 0.05-0.060 mg/kg (statistically equivalent). These results demonstrate that although La does trophically transfer, biomagnification does not occur and NP levels are equivalent or less than the bulk metal.