| 摘要 |
<p>The invention is directed to the treatment of waste water and other polluted materials. A compound of the general formula: (ZO)nAln(OH)n-mClm (or of closely related empirical formula), wherein Z is derived from an aluminosilicate material, is prepared by activating the aluminosilicate material by treating with acid or by subjecting the material to ammonium ion exchange and then heating the thus activated material in the presence of an alumino compound. The preferred aluminosilicate is a zeolite-containing mineral of a clinoptilolite structure and the preferred alumino compound is polyaluminiumchloride. The resultant product is pH neutral; non-toxic; suitable for use in flotation and sedimentation tanks; destabilizes suspensions, dispersions and emulsions; can be used over a wide pH range; is amphoteric and particularly suited for the elimination of heavy metal cations and phosphate anions; reduces chemical oxygen deficiency, biological oxygen deficiency and adsorbable organic halogenated hydrocarbons; decreases the amount of sludge while simultaneously increasing dry matter content; does not swell; is economical to use; and is not harmful to the environment.</p> |
