On-site separation of Cr(vi) and Cr(iii) in natural waters by parallel cartridge ion-exchange columns

Abstract

Development of a simple, fast, portable, and solvent-free method for on-site separation of Cr( = 6 \* ROMAN vi) and Cr( = 3 \* ROMAN iii) in natural waters.

Enhanced Photoreduction of U(VI) on C3N4 by Cr(VI) and Bisphenol A: ESR, XPS, and EXAFS Investigation

“…Traditionally, we can adjust the pH to separate different species from the mixed system according to their different precipitation coefficients, but the method is time-consuming and has low selectivity. Currently, ion-exchange resin and wet chemical methods are used to separate U­(IV) from U­(VI) reduction products. , Furthermore, the separation and recovery of Cr­(III) and Cr­(VI) were studied by using parallel cartridge ion-exchange, electrodeionization, and supported liquid membranes. − However, these methods are almost not suitable for complex wastewater. Therefore, the efficient separation of U­(IV), Cr­(III) from a complex system will be carried out in a further investigation.…”

Carbon Nanotubes-Based Fuel Cell for Cr(VI) Removal and Electricity Generation

“…As shown in Figure 5A, the elements of K, Cl, and Cr were generated on the GF/PPy/CNTs−COOH/Cr surface, which was likely KCl and Cr(III). Besides, the elements of K, Cl, and S were observed on the surface of GF after the reaction (Figure 5B), likely because of KCl and SO 4 2− according to reaction (5). Meanwhile, these results could be further demonstrated by EDS (Figure 5C).…”

“…It is worthwhile to mention that heavy metal pollution has become more and more serious due to the rapid development of industries. − With the rise of smelting and electroplating, chromium (Cr) has become one of the main metal pollutants . Chromium exists in two stable valence states, which includes trivalent chromium (Cr­(III)) and hexavalent chromium (Cr­(VI)). − Therein, Cr­(VI) is more poisonous compared with Cr­(III) and could affect human health and the growth of plants or animals .…”