Martins, AngelaNunes, Nelson2019-02-192019-02-192015-01MARTINS, Ângela; NUNES, Nelson – Adsorption of a textile dye on commercial activated carbon: a simple experiment to explore the role of surface chemistry and ionic strength. Journal of Chemical Education. ISSN 0021-9584. Vol. 92, N.º 1 (2015), pp. 143-1470021-95841938-1328http://hdl.handle.net/10400.21/9523In this study, an adsorption experiment is proposed using commercial activated carbon as adsorbent and a textile azo dye, Mordant Blue-9, as adsorbate. The surface chemistry of the activated carbon is changed through a simple oxidation treatment and the ionic strength of the dye solution is also modified, simulating distinct conditions of water hardness. The purpose of this experimental work, directed to undergraduate (second-year) students is to allow them to understand the influence of surface chemistry and ionic strength on the interaction between the carbon surface and the dye molecule.engSecond-year undergraduatePhysical chemistryEnvironmental chemistryHands-on learning/manipulativesSurface scienceUV-vis spectroscopyLaboratory instructionjournal article10.1021/ed500055v