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This study observed adsorption of selected organic species from the aqueous solution, EDTA and H2C2O4, at 283, 293 and 303 K. The adsorbent used was synthetic zeolite NH4BETA, product of the American company Zeolyst International, with the mole ratio of SiO2/Al2O3 = 25.00, for the purpose of examining its physical-chemical characteristics and obtaining more thorough information on the adsorption capacity and active centers, as well as for its potential application in purificati on of wastewaters from the organic pollutants. Results proved that adsorption of the adsorbates, under the same experimental conditions, was multi-layer physical, being stronger expressed when the adsorbate was oxalic acid, which is logical enough since its molecule is a lot smaller and of a simpler structure compared to the big molecule of EDTA.

Study of adsorption of selected organic species from aqueous solution on nh4be ta zeolite