Removal of Cr(VI) through calixarene based polymer inclusion membrane from chrome plating bath water

Selective removal of silver(i) using polymer inclusion membranes containing calixpyrroles

“…In the context of these results it should be noted that Raut et al 33 obtained the maximum permeability of cesium(I) ions for CTA membranes containing calix [4]bis-2,3-naphtho-crown-6 and 65% wt o-NPOE. Similar results were presented in the Kaya et al 34 study on the effect of plasticizers for the removal of Cr(IV) using calixarenes in plating bath water. They reported that o-NPPE was the best plasticizer.…”

Adsorptive removal of emerging polyfluoroalky substances F-53B and PFOS by anion-exchange resin: A comparative study

“…In the experiments on effect of pH, the solution pH varied from 3 to 12 with 0.35 mmol/L F-53B or PFOS solutions. F-53B and PFOS are primarily applied as chrome mist suppressant in China, and therefore mainly occur in chrome plating wastewater, by which SO 4 2− and Cr (VI) are the major coexisting anions [25,26]. So the competition experiments were conducted at pH 3 with 0.35 mmol/L F-53B or PFOS solution and 0-2 mmol/L sulfate (prepared with Na 2 SO 4 ) or chromate (prepared with K 2 Cr 2 O 7 ).…”

The comprehensive investigation of the room temperature ionic liquid additives in PVC based polymer inclusion membrane for Cr(VI) transport

“…In the range of studied thickness, P values for all membrane series prepared with different RTILs increased with increasing membrane thickness up to 52.9 ±3 µm. By the thicker membranes than 52.9 µm, P values sharply went down again depending on the raising pathway length throughout the membrane regarding the first law of Fick . Initial mass transfer coefficient ( J 0 ) depends on the Fick's first law, which implies that there is a linear correlation between 1 / J o and Δx = d (membrane thickness).…”