Gomri, FatimaFinqueneisel, GiseleZimny, ThierryKorili, Sophia A.Gil Bravo, AntonioBoutahala, Mokhtar2019-05-222019-05-2220182190-549510.1007/s13201-018-0823-6https://academica-e.unavarra.es/handle/2454/33112In this work, the preparation, characterization, and sorption of rhodamine 6G and humic acids on a composite sodium alginate-bentonite were investigated. Their structure and morphology were analyzed by several techniques, including Fourier transform infrared spectroscopy, X-ray diffraction, and N-2 adsorption at - 196 degrees C. A synergetic sorption mechanism was observed in binary systems; humic acids adsorption was enhanced by the presence of Rh6G in the mixture. The kinetic studies revealed that the sorption follows a pseudo-first-order kinetic model and the sorption capacities of Rh6G increased with the pH value. The Langmuir isothermal model well described the adsorption isotherm data, showing a maximum adsorption capacity for Rh6G up to 429.5 mg/g at 20 degrees C. On the basis of the data of the present investigation, it is possible to conclude that the composite exhibited excellent affinity for the dye and humic acids, and it can be applied to treat wastewater containing dye and natural organic matter.10 p.application/pdfengThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons .org/licen ses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.AdsorptionAlginateBentoniteCompositeHumic acidsRhodamine 6Ginfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess