INSITU INVESTIGATION OF 1,2-DIBROMOETHANE SORPTION DESORPTION PROCESSES ON CLAY MINERAL SURFACES BY DIFFUSE REFLECTANCE INFRARED-SPECTROSCOPY

被引：24

作者：

AOCHI, YO ^{[1
]}

FARMER, WJ ^{[1
]}

SAWHNEY, BL ^{[1
]}

机构：

[1] CONNECTICUT AGR EXPT STN,NEW HAVEN,CT 06504

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 1992年 / 26卷 / 02期

关键词：

D O I：

10.1021/es00026a013

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Sorption/desorption processes for 1,2-dibromoethane (EDB) at clay surfaces were investigated in situ by means of diffuse reflectance infrared spectroscopy. Spectra were collected during the sorption phase while N2 saturated with EDB flowed through the clay samples. Desorption processes were similarly followed by flowing N2 alone through the samples after the sorption period was completed. The spectral results indicated the presence of EDB in two conformations, anti and gauche, within a liquid phase. The relative abundance of the two conformers was a function of sorption or desorption time as well as the particular clay used as the sorbent. The abundance of the gauche conformer, however, was consistently higher during both phases of the experiment, indicating preferential retention of this conformer. A conceptual model of a clay as a dielectric medium is presented to explain these results.

引用

页码：329 / 335

页数：7

共 27 条

[1] SPECTROSCOPIC EVIDENCE FOR A COPPER PICLORAM COMPLEX ON CU(II)-SATURATED AND CU(II)-HYDROUS OXIDE COATED MONTMORILLONITE [J].