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首页> 外文期刊>Environmental Science & Technology >Abiotic and Microbial Oxidation of Laboratory-Produced Black Carbon (Biochar)
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Abiotic and Microbial Oxidation of Laboratory-Produced Black Carbon (Biochar)

机译：实验室生产的黑碳（生物炭）的非生物和微生物氧化

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摘要

Pyrogenic or "black" carbon is a soil and sediment component that may control pollutant migration, Biochar, black carbon made intentionally by biomass pyrolysis, is increasingly discussed as a possible soil amendment to increase fertility and sequester carbon. Though thought to be extremely refractory, it must degrade at some rate. Better understanding of the rates and factors controlling its remineralization in the environment is needed. Release of CO_2 was measured over 1 year from microbial and sterile incubations of biochars made from a range of biomass types and combustion conditions. Carbon release from abiotic incubations was 50-90% that of microbially inoculated incubations, and both generally decreased with increasing charring temperature. All biochars displayed log-linearly decreasing mineralization rates that, when modeled, were used to calculate 100 year C losses of 3-26% and biochar C half-lives on orders ranging from 10~2 to 10~7 years. Because biochar lability was found to be strongly controlled by the relative amount of a more aliphatic and volatile component, measurements of volatile weight content may be a convenient predictor of biochar C longevity. These results are of practical value to those considering biochar as a tool for soil remediation, amelioration, or atmospheric C sequestration.
机译：热解碳或“黑”碳是可控制污染物迁移的土壤和沉积物成分，越来越多地讨论了生物炭（通过生物质热解有意制造的黑碳）作为增加土壤肥力和固碳的一种可能的土壤改良剂。尽管被认为是极难熔的，但它必须以某种速度降解。需要更好地了解控制其在环境中再矿化的速率和因素。在一年的时间里，根据各种生物质类型和燃烧条件制成的生物炭经过微生物和无菌培养后，测量了CO_2的释放。非生物培养物的碳释放量是微生物培养物的碳释放量的50-90％，通常随着炭化温度的升高两者均降低。所有生物炭都显示出成对数线性降低的矿化速率，当建模时，这些生物炭用于计算100年的C损失为3-26％，生物炭C的半衰期为10〜2至10〜7年。由于发现生物炭的性能受脂肪族和挥发性较高的组分的相对含量的强烈控制，因此测量挥发性重量含量可能是生物炭C寿命的便捷预测指标。这些结果对于那些将生物炭作为土壤修复，改善或固碳的工具具有实用价值。

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  • 来源
    《Environmental Science & Technology》 |2010年第4期|1295-1301|共7页
  • 作者

    ANDREW R. ZIMMERMAN;

  • 作者单位

    Department of Geological Sciences, University of Florida, 241 Williamson Hall, P. O. Box 112120, Gainesville, Florida 32611-2120;

  • 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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  • 正文语种 eng
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