Adsorpcija neorganskih anjonskih zagađivača na modifikovanim mineralima

Abstract

Organo mineralni kompleksi su dobijeni aktivacijom osnovnih minerala (zeolita, bentonita i diatomijske zemlje) sa primarnim aminom (olejlaminom) i alkil amonijum jonom (stearil dimetil benzil amonijum hloridom). Efikasan adsorbent anjona je pripremljen modifikacijom površine prirodnog zeolita sa primarnim aminom. Polazni zeolit je prvo tretiran sa 2 M HCl, a zatim je na H-formi zeolita izvršena adsorpcija olejlamina. Napravljena su još četiri organo kompleksa modifikacijom bentonita i diatomijske zemlje sa stearil dimetil benzil amonijum jonom i ispitana je adsorpcija anjona na njima. Eksperimenti adsorpcije anjona su pokazali da se najefikasniji adsorbent za prečišćavanje voda kontaminiranim anjonima dobija dvostepenim (kiselinsko aminskim) tretiranjem prirodnog zeolita.

Organo-mineral complexes were obtained by treatment of aluminosilicate minerals (zeolite, bentonite and diatomaceous earth) with a primary amine (oleylamine) and an alkyl ammonium salt (stearyldimethylbenzyl ammonium chloride). The modification of the zeolite surface was carried out in two steps. The first step was treatment of the zeolite with 2M HCl. This acid treatment of the zeolite increased its affinity for neutral molecules such as surface-active amines. The second step of the modification was the adsorption of oleylamine on the acid treated zeolite. Four types of organo-mineral complexes were prepared and their anion adsorption properties were compared to those of organo-zeolite. The adsorption of sulphate bichromate and dihydrogenphosphate anions on the organo-mineral complexes was investigated. The anion adsorption measurements showed that the most efficient adsorbent for anion water pollutants was the primary amine modified H+-form zeolite.