Enhanced removal of trace Cr(VI) ions from aqueous solution by titanium oxide–Ag composite adsorbents

Removal of Cr(VI) from Aqueous Environments Using Micelle‐Clay Adsorption

“…It can be speculated that the binding of Cr(VI) to micelle-clays complex was initially regulated by acidity of solution, and then, as discussed above, reduction of Cr(VI) to Cr(III) can take place at a later stage, and chromium remains in the solution as unadsorbed fraction due to the positive charge of Cr(III). Similar results have been also reported in the literature using other low cost adsorbents [21, 22, 24–28]. …”

“…Presumably, reduction of Cr(VI) to Cr(III) takes place on the adsorbent followed by the release of Cr(III) into the solution leading to the observed deviation of retention curves. Similar results were also documented in the literature using other adsorbents [21, 22, 24–28]. …”

BiOX (X=Cl, Br, I) nanostructures: Mannitol-mediated microwave synthesis, visible light photocatalytic performance, and Cr(VI) removal capacity

“…Taking BiOBr nanostructures as an example, the estimated model parameters together with correlation coefficient (R 2 ) for the different models are summarized in Table S4 (Supporting Information). It indicates that the Langmuir model fits the adsorption data better than the Freundlich model for BiOBr nanostructures (SB2-SB4), suggesting the monolayer adsorption of Cr(VI) ions on the surface of BiOBr nanostructures [49]. The maximum Cr(VI) adsorption capacity (q max ) of the BiOBr nanostructures (SB2-SB4) were estimated to be 20.7, 17.7, and 63.5 mg g À1 , respectively.…”

Simultaneous removal of Cu2+ and Cr3+ ions from aqueous solution based on Complexation with Eriochrome cyanine‐R and derivative spectrophotometric method

“…Amongst, chromium ion is to be considered as a highly toxic metal, while it is consumed in drinking water and used in many textile industries such as metal finishing, leather tanning, electroplating and chromate preparation . Cr 3+ can lead to severe diarrhea, vomiting, pulmonary congestions liver and kidney damage . Cu 2+ is highly toxic for drinking water and it is important for animal metabolism .…”