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首页> 外文期刊>Soil Science Society of America Journal >INTERACTIONS OF ACIDIC HERBICIDES BENTAZON AND DICAMBA WITH ORGANOCLAYS
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INTERACTIONS OF ACIDIC HERBICIDES BENTAZON AND DICAMBA WITH ORGANOCLAYS

机译:酸性除草剂Bentazon和DICAMBA与有机粘土的相互作用

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We determined the sorption mechanism of the acidic herbicides bentazon [3-(1-methylethyl)-1H-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide] and dicamba (3,6-dichloro-2-methoxybenzoic acid) on two organoclays, octadecylammonium (ODA)- and hexadecyltrimethylammonium (HDTMA)-exchanged Arizona montmorillonite (SAz-1), as part of a study to determine their potential use as sorbent materials for ionizable organic pollutants. To determine the mechanisms involved in the sorption process, herbicide-organoclay complexes were characterized by x-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). In general, the d001 values of SAz-HDTMA and SAz-ODA organoclays expanded after herbicide saturation, indicating interlayer sorption of the herbicide. Also, FTIR spectroscopic studies suggested weak hydrophobic interactions between these herbicides and the interlayer organic phase of the organoclays. However, H bonding between these herbicides and the monosubstituted amino group in SAz-ODA reinforced the strength of the hydrophobic interactions resulting in nonreadily reversible sorption on that organoclay. These results suggest that organoclays can be used to remove this type of pollutants from water or soils.
机译:我们确定了酸性除草剂 bentazon [3-(1-甲基乙基)-1H-2,1,3-苯并噻二嗪-4(3H)-one 2 ,2-二氧化物]和麦草畏(3,6-二氯-2-甲氧基苯甲酸)蒙脱石(SAz-1),作为 研究的一部分,以确定其潜在用途作为可吸附材料 用于可离子化的有机污染物。为了确定吸附过程中涉及的机制,通过X射线衍射(XRD)和傅里叶变换(Sup>)红外光谱对除草剂-有机粘土复合物(sup> )进行了表征。 (FTIR)。通常, SAz-HDTMA和SAz-ODA有机粘土的d 001 值在除草剂饱和后膨胀, 表示除草剂的层间吸附。另外,FTIR 光谱学研究表明这些除草剂与 有机粘土的层间有机相之间的弱疏水相互作用 。但是,这些除草剂 与SAz-ODA中的单取代氨基之间的H键增强了疏水相互作用的 强度,导致对 的不可逆吸附。那有机粘土。这些结果表明 有机粘土可用于从水或土壤中去除这类污染物。

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