تطوير شكل جديد للزيوليت السوري بتعديله بمادة فعالة سطحيا كاتيونية : التحضير و التوصيف

الملخص EN

This paper presents a study of the possibility of modifying the surface of Syrian zeolite samples from anionic to cationic form using cationic surfactant Hexadecyltrimethylammonium bromide (HDTMA-Br), in order to use the modified zeolite in removal of anionic contaminants from polluted solutions.

Samples were obtained from Tel Mekhalat area and exploratory well No.

21 at different depths.

Labeled samples with dimensions ranging from 75 μm to 600 μm were characterized in different ways, including XRF technique, to determine the chemical composition of the studied samples.

The total cationic exchange capacity (CEC) and external cationic exchange capacity (ECEC) were determined before and after moving to the sodium form.

The maximum adsorption was studied at different degrees of coverage ranging from 50-250% of its external exchange capacity, in order to determine the best coverage, achieved higher adsorption of anionic pollutants.

The adsorption isomer of the cationic surfactant was studied and Langmuir constants were calculated for all samples.

The infrared spectrum of modified zeolite samples, in all granular diameters and degrees of coverage, were studied.

Experimental results show that the exchange capacity of zeolite samples in its sodium form reached 1.31 meq/g.

The study also showed that a 200% coverage for all granular dimensions give the highest value of adsorption for cationic surfactant on the surface of the zeolite.

IR study has shown the success of laying the surfactant HDTMA-Br on the surface of zeolite.

Experimental data demonstrate the possibility of using Syrian zeolite in the removal of anionic pollutants from various kinds of solutions