Suitability of dye-clay complexes for removal of non-ionic organic compounds from aqueous solutions
Suitability of dye-clay complexes for removal of non-ionic organic compounds from aqueous solutions
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DOI：
10.1016/s0045-6535(00)00337-4
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发表时间：
2001-08-01
期刊：
影响因子：
8.8
通讯作者：
Gerstl, Z
中科院分区：
文献类型：
--
作者：
Borisover, M;Graber, ER;Gerstl, Z
测定了钠蒙脱土（菲舍尔膨润土）与有机阳离子染料结晶紫和罗丹明- b形成的配合物对苯酚、阿特拉津和萘的吸附性能。吸附等温线是非线性的。这很好地符合染料粘土有机覆盖层的刚性性质，它为吸附提供了有限的表面。阿特拉津在罗丹明- b蒙脱土上的有机碳归一化分布系数较高，达到20000 - 25000，阿特拉津在结晶紫蒙脱土上达到7000，苯酚在结晶紫蒙脱土上达到1500。因此，染料粘土可以显著地扩展有机粘土吸附剂的种类，有效地降低非离子型有机化合物的水浓度。2001爱思唯尔科学有限公司版权所有。
Aqueous sorption of phenol, atrazine and naphthalene was measured on complexes formed from Na-montmorillonite (Fischer bentonite) and the organic cationic dyes crystal violet and rhodamine-B. Sorption isotherms were found to be non-linear. This agrees well with the rigid nature of the dye-clay organic coverage, which provides a finite surface for adsorption. High values of organic carbon-normalized distribution coefficients reached 20,000-25,000 for atrazine on rhodamine-B-montmorillonite, 7000 for atrazine on crystal violet-montmorillonite, and 1500 for phenol on crystal violet-montmorillonite. As such, dye-clays may significantly extend the variety of organoclay sorbents that effectively reduce aqueous concentrations of non-ionic organic compounds. (C) 2001 Elsevier Science Ltd. All rights reserved.