Phthalates are organic molecules found in various everyday materials, such as plastics, but they do not bond chemically to the product. Consequently, they are released and contaminate the environment. In humans, ingesting phthalates can stimulate a functionality similar to estrogen hormones, acting as endocrine disruptors, thus requiring selective adsorption. This paper demonstrates the use of cyclodextrins (CDs), which are useful due to their capacity for selective adsorption by the inclusion of organic molecules in their internal cavities to remove pollutants from water. Graphene (Gr) is also evaluated due to its interesting electronic properties and a large surface, making this nanomaterial ideal for molecule adsorption. Through ab initio simulations, three phthalate molecules, benzyl butyl phthalate (BBP), dicyclohexyl-phthalate (DCHP), and dipropyl phthalate (DPP) interacting with β-CD and Gr, were evaluated. The results indicate that a weak interaction occurs, through physical adsorption. β-CD interacting with phthalates tends to form a host-guest complex. In the case of Gr, weak adsorption is favored by π-π interactions and H-bonds. Therefore, this study shows that these nanosystems are promising for removing phthalate molecules from wastewater. materials plastics product Consequently environment humans hormones disruptors CDs, CDs , (CDs) water Gr (Gr surface simulations BBP, BBP (BBP) dicyclohexylphthalate dicyclohexyl DCHP, DCHP (DCHP) DPP (DPP βCD β CD occurs hostguest host guest complex ππ π Hbonds. Hbonds H bonds. bonds H-bonds Therefore wastewater (CDs (BBP (DCHP

Multi-walled and single-walled carbon nanotubes were used as adsorbents for the removal of Reactive Blue 4 textile dye from aqueous solutions. The adsorbents were characterised using Raman spectroscopy, N2 adsorption/desorption isotherms and scanning and transmission electron microscopy. The effects of pH, agitation time and temperature on adsorption capacity were studied. In the acidic pH region, the adsorption of the dye was favourable using both adsorbents. The contact time to obtain equilibrium isotherms at 298-323 K was fixed at 4 hours for both adsorbents. For Reactive Blue 4 dye, Liu isotherm model gave the best fit for the equilibrium data. The maximum sorption capacity for adsorption of the dye occurred at 323 K, attaining values of 502.5 and 567.7 mg g-1 for MWCNT and SWCNT, respectively.