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首页> 外文期刊>Environmental Science & Technology >Predicting Contaminant Adsorption in Black Carbon (Biochar)-Amended Soil for the Veterinary Antimicrobial Sulfamethazine
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Predicting Contaminant Adsorption in Black Carbon (Biochar)-Amended Soil for the Veterinary Antimicrobial Sulfamethazine

机译：预测兽用抗菌药物磺胺二甲嘧啶在黑碳（生物炭）改良土壤中的污染物吸附

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摘要

Commercial hardwood biochars ranging in N_2 specific surface area of 0.1-427 m~2·g~(-1) were added to an agricultural soil at 0, 1, or 2% levels to determine whether they would predictably reduce the pore water concentration of sulfamethazine (SMT). The soil and biochar-soil mixtures were preweathered under mild (2 d, 20 ℃) or more severe (28 d, 40 ℃) conditions before spiking. The carbon-normalized biochar-water distribution coefficient (K_(BC)) of the biochars varied by a factor of up to 10~4, depending on biochar properties and SMT concentration. Except for the fast-pyrolysis biochar, K_(BC) greatly exceeded the soil organic carbon-water distribution coefficient K_(OC). Sorption in the mixtures increased as expected with biochar and dose. However, sorption was dramatically overpredicted (by up to 10~(2.5)) by the sum of sorption to the individual components, indicating a strong weathering effect even under the mild conditions. The soil-subtracted weathered biochar-water isotherms were more linear, and the K_(BC) values approached or Iay within the range of K_(OC) values reported for SMT in 19 soils. Biochars both in intimate contact with soil and placed in a membrane bag suspended in the solution showed reduced N_2-B.E.T. surface area after weathering, implicating fouling of the biochar surface by humic substances transferred through water. The results indicate that only highly surfaceous, carbonaceous biochars would be useful for stabilizing soil contaminated with compounds such as SMT. They also suggest that weathering may attenuate the contribution of native (environmental) black carbon to sorption of such compounds in soils and sediments.
机译：将N_2比表面积范围为0.1-427 m〜2·g〜（-1）的商业硬木生物炭以0％，1％或2％的水平添加到农业土壤中，以确定它们是否可以预测地降低土壤中孔隙水的浓度。磺胺二甲嘧啶（SMT）。在加标之前，将土壤和生物炭-土壤混合物在温和的（2 d，20℃）或更恶劣的条件（28 d，40℃）下进行预风化。生物炭的碳归一化生物炭-水分布系数（K_（BC））取决于生物炭特性和SMT浓度的变化幅度最大为10〜4。除快速热解生物炭外，K_（BC）大大超过了土壤有机碳-水分配系数K_（OC）。随着生物炭和剂量的增加，混合物中的吸附增加。然而，对各个组分的吸附总和却大大地高估了吸附（最多达10〜（2.5）），即使在温和的条件下也显示出很强的耐候性。扣除土壤的风化生物炭-水等温线更线性，在19种土壤的SMT报道的K_（OC）值范围内，K_（BC）值接近或达到Iay。与土壤紧密接触并置于悬浮于溶液中的膜袋中的生物炭显示N_2-B.E.T。降低。风化后的表面积，暗示了通过水转移的腐殖质对生物炭表面的污染。结果表明，只有高度表面的碳质生物炭才可用于稳定被SMT等化合物污染的土壤。他们还认为，风化作用可能会削弱天然（环境）黑碳对此类化合物在土壤和沉积物中的吸附作用。

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  • 来源
    《Environmental Science & Technology》 |2013年第12期|6197-6205|共9页
  • 作者

    Marc Teixido; Carles Hurtado; Joseph J. Pignatello; Jose L. Beltran; Merce Granados; Jordan Peccia;

  • 作者单位

    Departament de Quimica Analitica, Carrer Marti i Franques, 1, 08028, Universitat de Barcelona, Barcelona, Spain;

    Departament de Quimica Analitica, Carrer Marti i Franques, 1, 08028, Universitat de Barcelona, Barcelona, Spain;

    Department of Environmental Sciences, Connecticut Agricultural Experiment Station, 123 Huntington Street, P.O. Box 1106, New Haven, Connecticut 06504-1106, United States,Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, United States;

    Departament de Quimica Analitica, Carrer Marti i Franques, 1, 08028, Universitat de Barcelona, Barcelona, Spain;

    Departament de Quimica Analitica, Carrer Marti i Franques, 1, 08028, Universitat de Barcelona, Barcelona, Spain;

    Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, 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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  • 正文语种 eng
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