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METHOD OF ENTRAPPING ENVIRONMENT HARMFUL SUBSTANCES FROM A MATERIAL CONTAMINATED WITH SUCH SUBSTANCES AND AN ALUMINIUM-REINFORCED LAYERED CATION OR ANION CLAY MATERIAL
METHOD OF ENTRAPPING ENVIRONMENT HARMFUL SUBSTANCES FROM A MATERIAL CONTAMINATED WITH SUCH SUBSTANCES AND AN ALUMINIUM-REINFORCED LAYERED CATION OR ANION CLAY MATERIAL
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机译:从被此类物质污染的材料和铝增强层状阳离子或阴离子黏土材料中捕获环境有害物质的方法
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摘要
A method is described for capturing ecologically harmful substances, both of organic and inorganic nature, by absorbing these substances on a zeolite or on a swellable, layered clay which has been modified with hydroxyaluminium to form an aluminium-rich zeolite or a pillared clay containing pillars of aluminium hydroxide complexes, said aluminium-rich zeolite or aluminium-pillared cationic or anionic clay having been treated, prior to the absorption, with a salt of an inorganic acid, preferably with a phosphate. If the treatment is carried out with a salt of a rare earth element, superpillars are formed in the clay, as a result of which a clay having a great absorbency in addition to a large rate of flow is obtained. By treating the pillared clay with a quaternary ammonium compound, a doubly modified clay is formed which is exceedingly suitable for treating material which has been polluted with a combination of organic and inorganic ecologically harmful substances, and in particular polluted with heavy metals.
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