2-Nitrophenol reduction promoted by S. putrefaciens 200 and biogenic ferrous iron: the role of different size-fractions of dissolved organic matter.
2-Nitrophenol reduction promoted by S. putrefaciens 200 and biogenic ferrous iron: the role of different size-fractions of dissolved organic matter.
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S. putrefaciens 200 和生物亚铁促进 2-硝基苯酚还原：溶解有机物的不同尺寸部分的作用。
DOI：
10.1016/j.jhazmat.2014.07.030
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发表时间：
2014-08
影响因子：
13.6
通讯作者：
Fangbai Li
中科院分区：
文献类型：
--
作者：
Zhenke Zhu;Liang Tao;Fangbai Li
自然地下环境中硝基芳香族化合物(被列为优先污染物)的还原通常与溶解有机物(DOM)对铁氧化物的异化还原并存。研究影响这些还原过程的DOM的影响，对于理解和预测这些环境物种的地球化学命运至关重要。研究了不同相对分子质量的DOM组分(DMWDS)对2-硝基苯酚(2-NP)还原的影响。腐蚀剂200(SP200)和含乳酸的α-Fe2O3(不包括电子供体干扰)。动力学测量表明，2-NP还原速率受DMWDS下活性物种(L-DOM、M-DOM和H-DOM)的氧化还原活性的影响。还原速率的增强与氧化电位值的负移、类HA/类FA值、芳香性指数和电子转移能力值的增加相一致。L-DOM主要作为络合物Fe(II)的配体，而H-DOM在还原反应中的重要作用应该是作为电子穿梭，将电子从SP200传递到Fe(III)和2-NP，从生物来源的Fe(II)传递到2-NP，进一步加速了2-NP的还原。这些观察结果对DOM在生物地球化学氧化还原过程中的作用以及对自然环境中受污染土壤的修复提供了有价值的见解。
The reduction of nitroaromatic compounds (listed as a priority pollutant) in natural subsurface environments typically coexists with dissimilatory reduction of iron oxides effected by dissolved organic matter (DOM). Investigating the impact of the DOM that influences those reduction processes is crucial for understanding and predicting the geochemical fate of these environmental species. This study investigated the impact of different molecular weight DOM fractions (DMWDs) on the 2-nitrophenol (2-NP) reduction byS. putrefaciens200 (SP200) and α-Fe2O3with lactate (excluding electron donor interference). Kinetic measurements demonstrated that 2-NP reduction rates were affected by the redox reactivity of active species under DMWDs (denoted as L-DOM, M-DOM, and H-DOM). The enhanced reduction rates are consistent with the negative shifts in peak oxidation potential values, the increases in HA-like/FA-like values, aromaticity index values and electron transfer capacity values. L-DOM acted mainly as ligands to complex Fe(II), whereas the significant role of H-DOM in reductive reactions should be acting as an electron shuttle, transferring electrons from SP200 to Fe(III) and 2-NP and from biogenic Fe(II) to 2-NP, further accelerating the 2-NP reductions. Those observations provide valuable insights into the role of DOM in the biogeochemical redox processes and the remediation of contaminated soil in a natural environment.
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影响因子：
11.4
作者：
R. Royer;W. D. Burgos;Angela S Fisher;R. F. Unz;B. Dempsey
通讯作者：
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影响因子：
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11.4
作者：
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Fangbai Li;Liang Tao;C. Feng;Xiang-zhong Li;K. Sun
影响因子：
11
作者：
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通讯作者：
Jansson, Mats
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影响因子：
6.9
作者：
Zheng Yongliang;Liu Deli;Xiong Li
通讯作者：
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