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首页> 外文期刊>Environmental Science & Technology >Adsorption And Oxidative Transformation Of Phenolic Acids By Fe(III)-Montmorillonite
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Adsorption And Oxidative Transformation Of Phenolic Acids By Fe(III)-Montmorillonite

机译：Fe（III）-蒙脱土对酚酸的吸附和氧化转化

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摘要

Phenolic acids participate in various soil processes and are of great concern due to their allelopathic activity. The interactions of phenolic acids (ferulic, p-coumaric, synngic, and vanillic) with montmorillonite enriched with Fe(III) was investigated. Adsorption of the phenolic acids on Fe(III)-montmorillonlte was accompanied by their oxidative transformation and formation of Fe(II). Oxidative transformation of phenolic acids was affected by their molecularstructure. The order of maximaltransformation at the initial acid concentration of 20 mg/L on the surface of Fe(III)-montmorillonite was ferulic (94%), synngic (60%), p-coumaric (35%), and vanillic (25%). Benzolc acid which was used as a reference aromatic compound exhibited only 5% transformation. Removal of the phenolic acids from solution increased with decreasing pH. LC-MS analysis demonstrated the presence of dimers, trimers, and tetramers of ferulic acid on the surface of Fe(III)-montmorillonite. Oxidation and transformation of ferulic acid were more intense on the surface of Fe(III)-montmorillonite as compared to Fe(III) in solution due to stronger complexation on the clay surface. The results of the current study demonstrate the importance of Fe(III)-clay surfaces for the abiotic formation of humic materials and for the transformation of aromatic (phenolic) pollutants.
机译：酚酸参与各种土壤过程，并且由于其化感作用而引起人们的极大关注。研究了酚酸（阿魏酸，对香豆酸，辛酸和香草酸）与富含Fe（III）的蒙脱石的相互作用。酚酸在Fe（III）-蒙脱酮上的吸附伴随着它们的氧化转化和Fe（II）的形成。酚酸的氧化转化受到其分子结构的影响。 Fe（III）-蒙脱石表面初始酸浓度为20 mg / L时，最大转化顺序为阿魏酸（94％），辛酸（60％），对香豆酸（35％）和香草酸（25％） ）。用作参比芳族化合物的苯甲酸仅显示5％的转化率。随着溶液pH值的降低，从溶液中去除酚酸的数量也随之增加。 LC-MS分析表明，Fe（III）-蒙脱土表面上存在阿魏酸的二聚体，三聚体和四聚体。与溶液中的Fe（III）相比，Fe（III）-蒙脱土表面上的阿魏酸的氧化和转化作用更强，这是因为粘土表面上的络合作用更强。当前研究的结果表明，Fe（III）-粘土表面对于腐殖质的非生物形成和芳香族（酚类）污染物转化的重要性。

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  • 来源
    《Environmental Science & Technology》 |2010年第11期|P.4203-4209|共7页
  • 作者

    TAMARA POLUBESOVA; SHAY ELDAD; BENNY CHEFETZ;

  • 作者单位

    Department of Soil and Water Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel;

    rnDepartment of Soil and Water Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel;

    rnDepartment of Soil and Water Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel;

  • 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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