Fullerene-Enhanced Accumulation of p,p鈥?DDE in Agricultural Crop Species
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- 作者：Roberto De La Torre-Roche ; Joseph Hawthorne ; Yingqing Deng ; Baoshan Xing ; Wenjun Cai ; Lee A. Newman ; Chen Wang ; Xingmao Ma ; Jason C. White
- 刊名：Environmental Science & Technology (ES&T)
- 出版年：2012
- 出版时间：September 4, 2012
- 年：2012
- 卷：46
- 期：17
- 页码：9315-9323
- 全文大小：412K
- 年卷期：v.46,no.17(September 4, 2012)
- ISSN：1520-5851
文摘
The effect of C60 fullerene exposure on the accumulation of dichlorodiphenyldichloroethylene (p,p鈥?DDE; DDT metabolite) by Cucurbita pepo L. (zucchini), Glycine max L. (soybean), and Solanum lycopersicum L. (tomato) was determined. The plants were grown in 125 mL jars of vermiculite amended with 0 or 40 mg of C60 fullerenes. Prior to planting, the jars were amended with 40 mL solution containing 100 ng/mL of p,p鈥?DDE with 0 or 100 mg/L humic acid. During three weeks of growth, plants were watered with the same p,p鈥?DDE containing solutions. Total shoot p,p鈥?DDE levels in nonfullerene exposed tomato, soybean, and zucchini were 26.9, 131, and 675 ng, respectively; total root DDE content for the three plants was 402, 5970, and 5830 ng, respectively. Fullerenes increased the shoot p,p鈥?DDE content of zucchini by 29%; contaminant levels in soybean shoots were decreased by 48% but tomato shoot content was unaffected. The root and total plant p,p鈥?DDE content of all three species was significantly increased by fullerene exposure; enhanced contaminant uptake ranged from 30 to 65%. Humic acid, regardless of fullerene presence or plant type, significantly decreased the p,p鈥?DDE uptake. Fullerenes were detected in the roots of all plants but were not detected in plant shoots in the initial study. In a follow up study with zucchini designed to maximize biomass for extraction, over half the analyzed stems contained fullerenes at 60.5 to 4490 ng/g. These findings show that the carbon-based nanomaterials may significantly alter the accumulation and potentially the toxicity of cocontaminants in agricultural systems.