A polymer inclusion membrane for extracting thiocyanate from weakly alkaline solutions

Exploring new DGT samplers containing a polymer inclusion membrane for mercury monitoring

“…The commercial quaternary ammonium salt Aliquat 336 (trioctylmethylammonium chloride) has extensively been used as a carrier in PIMs forming suitable membranes in either CTA or PVC polymers (Vázquez et al 2014). PIMs incorporating Aliquat 336 have been shown to effectively transport anionic species in a wide range of applications since they are suitable to transport organic compounds such as antibiotics (GarciaRodríguez et al 2015), inorganic anions (Nagul et al 2013;Cho et al 2011), or metallic species like Cd (Pont et al 2008) or Cr (Gherasim et al 2011), among others. This extractant has the particularity that it is an ionic liquid (IL) at room temperature.…”

Selective transport of Cadmium by PVC/Aliquat 336 polymer inclusion membranes (PIMs): the role of membrane composition and solution chemistry

“…PIMs minimize the risk of releasing these chemicals into the environment by encapsulating the extractant in a polymer matrix (Nghiem et al 2006). In fact, the stability of PIMs has been recently confirmed by Cho et al (2011) who showed no leaching of the extractant or any significant loss of performance of a PVC/Aliquat 336 PIM after repetitive cycles of extraction and de-extraction of thiocyanate. This removes the in-situ need for large inventories of solvents and reduces the environmental exposure to extractants in their mobile form (Nghiem et al 2006).…”

A study of the ammonium ion extraction properties of polymer inclusion membranes containing commercial dinonylnaphthalene sulfonic acid

“…DOP is less polar than NPOE (ε r ¼ 5.22 at 20 1C [17]); it has high viscosity (40.4 cP [1]) and low water solubility (0.00027 g Kg À 1 H 2 O at 25 1C [17]). 1-Tetradecanol has been successfully used before in the preparation of Aliquat 336-based PIMs [18]. It has very low polarity (ε r ¼4.42 at 45 1C [17]) and low water solubility (0.00031 g Kg À 1 H 2 O at 25 1C [17]).…”