Intercalation of trichloroethene by sediment-associated clay minerals.
Intercalation of trichloroethene by sediment-associated clay minerals.
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DOI：
10.1016/j.chemosphere.2012.07.061
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发表时间：
2013-01
期刊：
影响因子：
8.8
通讯作者：
Curry JE
中科院分区：
文献类型：
--
作者：
Matthieu DE 3rd;Brusseau ML;Johnson GR;Artiola JL;Bowden ML;Curry JE
本研究的目的是探讨潜在的嵌入三氯乙烯（TCE）的粘土矿物与含水层沉积物。沉积物样品是从亚利桑那州图森市的一个现场采集的。两个广泛使用的Montreal样本粘土作为对照。X射线衍射，进行了一个受控环境室，被用来表征蒙脱石层间d间距为三个处理（散装空气干燥样品，样品与合成地下水混合，样品与三氯乙烯饱和的合成地下水混合）。结果表明，无论是现场土样还是粘土样，经三氯乙烯饱和的人工地下水处理后的土样的d间距均比未经处理的土样大26%左右。这些结果表明，TCE是由粘土矿物，这可能有助于广泛的洗脱尾观察到的先前的置换实验与此沉积物进行插层。
The objective of this research was to examine the potential for intercalation of trichloroethene (TCE) by clay minerals associated with aquifer sediments. Sediment samples were collected from a field site in Tucson, AZ. Two widely used Montmorillonite specimen clays were employed as controls. X-ray diffraction, conducted with a controlled-environment chamber, was used to characterize smectite interlayer d-spacing for three treatments (bulk air-dry sample, sample mixed with synthetic groundwater, sample mixed with TCE-saturated synthetic groundwater). The results show that the d-spacing measured for the samples treated with TCE-saturated synthetic groundwater are larger (~26%) than those of the untreated samples for all field samples as well as the specimen clays. These results indicate that TCE was intercalated by the clay minerals, which may have contributed to the extensive elution tailing observed in prior miscible-displacement experiments conducted with this sediment.
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