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首页> 外文期刊>Environmental Science & Technology >PARAFAC Modeling of Irradiation- and Oxidation-Induced Changes in Fluorescent Dissolved Organic Matter Extracted from Poultry Litter
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PARAFAC Modeling of Irradiation- and Oxidation-Induced Changes in Fluorescent Dissolved Organic Matter Extracted from Poultry Litter

机译：从辐照和氧化诱导的家禽垃圾中荧光溶解的有机物质变化的PARAFAC建模

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摘要

Parallel factor analysis (PARAFAC) applied to fluorescence excitation emission matrices (EEMs) allows quantitative assessment of the composition of fluorescent dissolved organic matter (DOM). In this study, we fit a four-component EEM-PARAFAC model to characterize DOM extracted from poultry litter. The data set included fluorescence EEMs from 291 untreated, irradiated (253.7 nm, 310-410 nm), and oxidized (UV-H_2O_2, ozone) poultry litter extracts. The four components were identified as microbial humic-, terrestrial humic-, tyrosine-, and tryptophan-like fluorescent signatures. The Tucker's congruence coefficients for components from the global (i.e., aggregated sample set) model and local (i.e., single poultry litter source) models were greater than 0.99, suggesting that the global EEM-PARAFAC model may be suitable to study poultry litter DOM from individual sources. In general, the transformation trends of the four fluorescence components were comparable for all poultry litter sources tested. For irradiation at 253.7 nm, ozonation, and UV-H_2O_2 advanced oxidation, transformation of the humic-like components was slower than that of the tryptophan-like component. The opposite trend was observed for irradiation at 310-410 nm, due to differences in UV absorbance properties of components. Compared to the other EEM-PARAFAC components, the tyrosine-like component was fairly recalcitrant in irradiation and oxidation processes. This novel application of EEM-PARAFAC modeling provides insight into the composition and fate of agricultural DOM in natural and engineered systems.
机译：应用于荧光激发发射矩阵（EEM）的并行因子分析（PARAFAC）可以定量评估荧光溶解有机物（DOM）的成分。在这项研究中，我们拟合了四成分EEM-PARAFAC模型来表征从家禽垫料中提取的DOM。数据集包括来自291份未经处理的，辐照的（253.7 nm，310-410 nm）和氧化的（UV-H_2O_2，臭氧）家禽凋落物提取物的荧光EEM。这四个成分被鉴定为微生物腐殖质，陆地腐殖质，酪氨酸和色氨酸样荧光标记。整体（即，集合样本集）模型和局部（即，家禽垫料源）模型的成分的塔克一致性系数均大于0.99，这表明全球EEM-PARAFAC模型可能适合于研究来自以下方面的家禽垫料DOM：个别来源。通常，对于所有测试的家禽垫料源，四种荧光成分的转化趋势都是可比的。对于在253.7 nm处的辐照，臭氧化和UV-H_2O_2的高级氧化，类腐殖质组分的转化要慢于色氨酸类组分。由于组分的紫外线吸收性质的差异，在310-410 nm处观察到相反的趋势。与其他EEM-PARAFAC组分相比，类似酪氨酸的组分在辐射和氧化过程中相当顽强。 EEM-PARAFAC建模的这一新颖应用提供了对自然和工程系统中农业DOM的组成和命运的洞察力。

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  • 来源
    《Environmental Science & Technology》 |2017年第14期|8036-8047|共12页
  • 作者

    Mangalgiri Kiranmayi P.; Timko Stephen A.; Gonsior Michael; Blaney Lee M.;

  • 作者单位

    University of Maryland Baltimore County, Department of Chemical, Biochemical and Environmental Engineering, 1000 Hilltop Circle, ECS 314, Baltimore, MD, United States;

    Kennedy/Jenks Consultants, 1191 Second Avenue, Suite 630, Seattle, WA, United States;

    University of Maryland, Center for Environmental Science, Chesapeake Biological Laboratory, 146 Williams Street, P.O. Box 38, Solomons, MD, United States;

    University of Maryland Baltimore County, Department of Chemical, Biochemical and Environmental Engineering, 1000 Hilltop Circle, ECS 314, Baltimore, MD, 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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