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SM ISO690:2012 CEBAN (GÎNSARI), Irina, BUGA, Mihaela, NASTAS, Raisa, MITINA, Tatiana, PETUHOV, Oleg, LUPASCU, Tudor. Preliminary studies regarding the adsorption of phenazone and cadmium ions on commercial zeolite. In: Ecological chemistry ensures a healthy environment, 16 septembrie 2022, Chisinau. Chişinău: Institute of Chemistry, 2022, p. 21. DOI: https://doi.org/10.19261/enece.2022.ab12 |
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Ecological chemistry ensures a healthy environment 2022 | |||||||
Seminarul "Ecological chemistry ensures a healthy environment. " Chisinau, Moldova, 16 septembrie 2022 | |||||||
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DOI:https://doi.org/10.19261/enece.2022.ab12 | |||||||
Pag. 21-21 | |||||||
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One of the main problems of modern medicine is intoxication of a human organism, as a result of the direct impact of the negative state of the environment. The scientific results have shown that the detoxification of the organism can be performed by enterosorbents for removal of various toxic substances from the organism, both that enter in it from the environment or form in the organism itself [1,2]. Here we present the preliminary results obtained for adsorption of phenazone (marker of hepatic enzyme drug metabolizind activity) and cadmium ions (endocrine disruptor) on commercial zeolite from water solutions in order to develop new composites-enterosorbents. Batch adsorption experiments were carried out by contacting the same amount of the zeolites with the phenazone, cadmium ions solutions and the mixtures of these two adsorbates. The solution pH (3.0 and 5.5) was maintained by using acetate buffer solutions and the suspensions were vigorously shaken at 35 ºC. The phases were separated by filtration and the residual phenazone and cadmium ions were determined by UV-Vis and AAS spectroscopies. Summarizing the preliminary results, it was found that, (i) the adsorption capacity of the zeolite for phenazone is higher than for cadmium ions, being approx. 7 and 4 mg/g, respectively; (ii) as the pH value rises from 3 to 5.5, the adsorption capacity of the zeolite for both adsorbates decreases, up to approx. 5mg/g for phenazone and approx. 0.3 mg/g for Cd ions; (iii) in the case of the adsorption of phenazone and cadmium ions from the mixture on zeolite, at both pH values, the behaviour is similar as in the case of the adsorption of these adsorbates from individual solutions; (iv) for adsorption from the mixture, the adsorption capacity of the zeolite decreases with the increase of the pH value (5.5), for phenazone from approx. 6 mg/g at approx. 3.5 mg/g and for cadmium ions from approx. 6 mg/g to 0.6 mg/g; (v) by comparing the results obtained for the adsorption of adsorbates from individual solutions and the mixture, it is observed that, in the case of adsorption from the mixture, the adsorption capacity of phenazone decreases slightly, whilst for the adsorption capacity of cadmium the insignificant increase has been registered, for both pH values. |
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