Enhanced removal of Cr(VI) from aqueous solution by stabilized nanoscale zero valent iron and copper bimetal intercalated montmorillonite

Development of Leather Fiber/Polyurethane Composite with Antibacterial, Wet Management, and Temperature-Adaptive Flexibility for Foot Care

“…When it contacts skin, the free chromium on the product surface may be released by the aid of sebum and sweat derived from skin, which is harmful to human body and the environment . Typically, it is known that Cr­(VI) is easily absorbed into the human body because the active form of Cr­(VI) as chromate structurally resembles sulfate and therefore readily penetrates the cell membrane, including those of red blood cells, by sulfate transporters. Many quantitative studies have demonstrated that ion forms of chromium have higher absorption than its less soluble forms.…”

Enhanced Cr(vi) removal by hierarchical CoFe2O4@SiO2–NH2via reduction and adsorption processes

“…It is well documented that iron-containing substances exhibit high Cr species immobilization efficiencies due to their strong affinity for Cr(VI) accompanied by their advantages of low cost and extensive availability. [20][21][22][23] For example, ferrous ions, sulfides, and organic compounds have been widely used for the reduction of Cr(VI) due to their excellent affinity for Cr(VI). [24][25][26] Unfortunately, most of them suffer from severe drawbacks, such as weak adsorption capacities and complex synthetic processes.…”

Preparation of Montmorillonite Nanosheets with a High Aspect Ratio through Heating/Rehydrating and Gas-Pushing Exfoliation

“…Recently, MMT nanosheets have been greatly utilized for their 2D sheet-like morphology with a large specific area, high mechanical/thermal stability, and predominant adsorption capacity brought about by randomly distributed adsorption sites. − As low-cost adsorbents and catalyst supports, MMT nanosheets usually facilitate a synergistic effect in forming functional interfacial structures with different adsorption mechanisms, resulting in remarkable progress in removing methylene blue or heavy ions in water and thereby providing anchoring sites for DNA and improving the dispersion of MoS 2 in the aqueous phase. ,− Ding et al prepared large-scale biomimetic poly­(vinyl alcohol) (PVA)/MMT nanocoatings with a nacre-like co-cross-linked microstructure via a creatively unique vertically flow-induced process after dip-coating low-viscosity liquid on a polylactic acid (PLA) substrate, which overcame the difficulty of MMT nanosheet orientation and exhibited outstanding mechanical and barrier properties as well as flame retardancy. Based on the sequential adsorption of nanometer-thick MMT nanosheets and PVA of the layer-by-layer process, Podsiadlo et al .…”