Multiwalled Carbon Nanotubes and C60 Fullerenes Differentially Impact the Accumulation of Weathered Pesticides in Four Agricultural Plants
| Autor: | Lee A. Newman, Joseph Hawthorne, Qiang Wang, Helmi Hamdi, Roberto De La Torre-Roche, Xingmao Ma, Baoshan Xing, Yingqing Deng, Jason C. White, Wenjun Cai |
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| Rok vydání: | 2013 |
| Předmět: |
Crops
Agricultural Insecticides Time Factors biology Pesticide residue Nanotubes Carbon Dichlorodiphenyl Dichloroethylene Pesticide Residues Biomass Chlordane General Chemistry Pesticide biology.organism_classification Cucurbita pepo Horticulture chemistry.chemical_compound chemistry Chlordan Shoot Glycine Botany Soil Pollutants Environmental Chemistry Fullerenes Solanum |
| Zdroj: | Environmental Science & Technology. 47:12539-12547 |
| ISSN: | 1520-5851 0013-936X |
| DOI: | 10.1021/es4034809 |
| Popis: | The effect of multiwalled carbon nanotubes (MWCNT) or C60 fullerenes on the uptake of weathered chlordane or DDx (DDT + metabolites) by Cucurbita pepo (zucchini), Zea mays (corn), Solanum lycopersicum (tomato), and Glycine max (soybean) was investigated. The plants were grown in 50 g of soil with weathered chlordane (2150 ng/g) and DDx (118 ng/g) that was amended with 0, 500, 1000, or 5000 mg/kg MWCNT or C60. After 28 d, the root and shoot content of chlordane components and DDx was determined by GC-MS. Zucchini and tomato growth were unaffected by carbon nanomaterial coexposure, although C60 at 500 mg/kg reduced corn and soybean biomass by 36.5-45.0%. Total chlordane content ranged from 1490 (tomato) to 4780 (zucchini) ng; DDx amounts ranged from 77.8 (corn) to 395 ng (zucchini). MWCNT coexposure decreased chlordane and DDx accumulation 21-80% across all crops, depending on species and nanotube concentration. Conversely, C60 had species- and contaminant-specific effects on pesticide uptake, ranging from complete suppression of DDx uptake (corn/tomato) to 34.9% increases in chlordane accumulation (tomato/soybean). The data show that pesticide accumulation varies greatly with crop species and carbon nanomaterial type/concentration. These findings have implications for food safety and for the use of engineered nanomaterials in agriculture. |
| Databáze: | OpenAIRE |
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