000132479 001__ 132479
000132479 005__ 20240311111225.0
000132479 0247_ $$2doi$$a10.1016/j.cscee.2023.100575
000132479 0248_ $$2sideral$$a137661
000132479 037__ $$aART-2024-137661
000132479 041__ $$aeng
000132479 100__ $$aPeñafiel, María E.
000132479 245__ $$aEnhancing adsorptive removal of diclofenac from aqueous solution: Evaluating organic and inorganic acid treatment of zeolite
000132479 260__ $$c2024
000132479 5060_ $$aAccess copy available to the general public$$fUnrestricted
000132479 5203_ $$aThis study examined the adsorption capacity of natural zeolite (ZN) and zeolite treated with citric acid (ZCA) and nitric acid (ZNA) to evaluate their effectiveness in removing the pharmaceutical compound diclofenac (DCF) from water in batch experiments. Fourier Transform Infrared Spectroscopy (FTIR) and textural properties (BET) were used to investigate the changes in zeolite resulting from chemical modifications. The findings demonstrate a significant enhancement in surface area, pore volume, and the presence of acidic sites, resulting in an improved adsorption capacity for DCF. The observed increase in the Si/Al ratio following acid treatment suggests the de-alumination of the zeolite. Results have shown an increase in the percentage of DCF adsorbed to 76.8 % from 11.2 % using nitric acid-treated and untreated zeolites, respectively. In comparison, citric acid zeolite achieves 48.9 %. The adsorption kinetic was assessed using pseudo-first and pseudo-second-order models, and it was observed that the pseudo-second-order provided the best fit for all adsorbents. Furthermore, the BET model exhibited the best fit for the adsorption isotherm data. The maximum adsorption capacities were found to follow the order: ZNA (85.9 mg/g) > ZCA (33.6 mg/g) > ZN (14.4 mg/g). These results indicate that the acidic treatment enhances the adsorption capacity of the zeolite, and nitric acid treatment shows the most significant improvement.
000132479 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000132479 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000132479 700__ $$aJara-Cobos, Lourdes
000132479 700__ $$aFlores, Damián
000132479 700__ $$aJerves, Carola
000132479 700__ $$0(orcid)0000-0002-2494-102X$$aMenendez, Miguel$$uUniversidad de Zaragoza
000132479 7102_ $$15005$$2555$$aUniversidad de Zaragoza$$bDpto. Ing.Quím.Tecnol.Med.Amb.$$cÁrea Ingeniería Química
000132479 773__ $$g9 (2024), 100575 [11 pp.]$$tCase Studies in Chemical and Environmental Engineering$$x2666-0164
000132479 8564_ $$s4490800$$uhttps://zaguan.unizar.es/record/132479/files/texto_completo.pdf$$yVersión publicada
000132479 8564_ $$s2504960$$uhttps://zaguan.unizar.es/record/132479/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000132479 909CO $$ooai:zaguan.unizar.es:132479$$particulos$$pdriver
000132479 951__ $$a2024-03-11-09:52:10
000132479 980__ $$aARTICLE