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首页> 外文期刊>Environmental Science & Technology >Long-Term Effects of Multiwalled Carbon Nanotubes and Graphene on Microbial Communities in Dry Soil
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Long-Term Effects of Multiwalled Carbon Nanotubes and Graphene on Microbial Communities in Dry Soil

机译：碳纳米管和石墨烯对干旱土壤微生物群落的长期影响

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摘要

Little is known about the long-term effects of engineered carbonaceous nanomaterials (ECNMs) on soil microbial communities, especially when compared to possible effects of natural or industrial carbonaceous materials. To address these issues, we exposed dry grassland sod for 1 year to 1 mg g~(-1) of either natural nanostructured material (biochar), industrial carbon black, three types of multiwalled carbon nanotubes (MWCNTs), or graphene. Soil microbial biomass was assessed by substrate induced respiration and by extractable DNA. Bacterial and fungal communities were examined by terminal restriction fragment length polymorphism (T-RFLP). Microbial activity was assessed by soil basal respiration. At day 0, there was no treatment effect on soil DNA or T-RFLP profiles, indicating negligible interference between the amended materials and the methods for DNA extraction, quantification, and community analysis. After a 1-year exposure, compared to the no amendment control, some treatments reduced soil DNA (e.g., biochar, all three MWCNT types, and graphene; P ＜ 0.05) and altered bacterial communities (e.g., biochar, carbon black, narrow MWCNTs, and graphene); however, there were no significant differences across the amended treatments. These findings suggest that ECNMs may moderately affect dry soil microbial communities but that the effects are similar to those from natural and industrial carbonaceous materials, even after 1-year exposure.
机译：关于工程碳纳米材料（ECNM）对土壤微生物群落的长期影响知之甚少，尤其是与天然或工业碳质材料的可能影响相比。为了解决这些问题，我们将干燥的草皮草暴露于1 mg g〜（-1）的天然纳米结构材料（biochar），工业炭黑，三种类型的多壁碳纳米管（MWCNT）或石墨烯中，暴露了1年。通过底物诱导的呼吸作用和可提取的DNA评估土壤微生物的生物量。通过末端限制性片段长度多态性（T-RFLP）检查细菌和真菌群落。通过土壤基础呼吸来评估微生物活性。在第0天，对土壤DNA或T-RFLP谱图没有处理效果，表明修改后的材料与DNA提取，定量和群落分析方法之间的干扰可忽略不计。与未经修正的对照相比，暴露一年后，一些处理降低了土壤DNA（例如，生物炭，所有三种MWCNT类型和石墨烯； P ＜0.05）并改变了细菌群落（例如，生物炭，炭黑，窄MWCNT）和石墨烯）；但是，经过修改的治疗方法之间没有显着差异。这些发现表明，ECNMs可能会适度影响干旱土壤微生物群落，但即使暴露1年，其影响也与天然和工业含碳物质相似。

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  • 来源
    《Environmental Science & Technology》 |2016年第7期|3965-3974|共10页
  • 作者

    Yuan Ge; John H. Priester; Monika Mortimer; Chong Hyun Chang; Zhaoxia Ji; Joshua P. Schimel; Patricia A. Holden;

  • 作者单位

    State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China,Bren School of Environmental Science and Management, University of California, Santa Barbara, California 93106, United States,Earth Research Institute, University of California, Santa Barbara, California 93106, United States,University of California Center for the Environmental Implications of Nanotechnology (UC CEIN), University of California, Santa Barbara, California 93106, United States;

    Bren School of Environmental Science and Management, University of California, Santa Barbara, California 93106, United States,Earth Research Institute, University of California, Santa Barbara, California 93106, United States,University of California Center for the Environmental Implications of Nanotechnology (UC CEIN), University of California, Santa Barbara, California 93106, United States;

    Bren School of Environmental Science and Management, University of California, Santa Barbara, California 93106, United States,Earth Research Institute, University of California, Santa Barbara, California 93106, United States,University of California Center for the Environmental Implications of Nanotechnology (UC CEIN), University of California, Santa Barbara, California 93106, United States,Laboratory of Environmental Toxicity, National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia;

    University of California Center for the Environmental Implications of Nanotechnology (UC CEIN), University of California, Santa Barbara, California 93106, United States;

    University of California Center for the Environmental Implications of Nanotechnology (UC CEIN), University of California, Santa Barbara, California 93106, United States;

    Earth Research Institute, University of California, Santa Barbara, California 93106, United States,University of California Center for the Environmental Implications of Nanotechnology (UC CEIN), University of California, Santa Barbara, California 93106, United States,Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, California 93106, United States;

    Bren School of Environmental Science and Management, University of California, Santa Barbara, California 93106, United States,Earth Research Institute, University of California, Santa Barbara, California 93106, United States,University of California Center for the Environmental Implications of Nanotechnology (UC CEIN), University of California, Santa Barbara, California 93106, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 入库时间 2022-08-17 13:58:40

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