Efficient separation of arsenic species of oxyanion As (III) and As (V) by using effective polymer inclusion membranes (PIM)

Hybridized sulfated-carboxymethyl cellulose/MWNT nanocomposite as highly selective electrochemical probe for trace detection of arsenic in real environmental samples

“…7 In the past, various sensitive techniques, including atomic absorption spectroscopy, 8,9 ion chromatography, 10,11 inductively coupled plasma mass spectrometry, 12 and neutron activation analysis, have been developed and successfully used to detect arsenic. 13,14 However, these methods still had several drawbacks, such as the need for expensive, large-scale equipment, being time-consuming, and difficulty executing the procedures. However, the majority of these methods demand prolonged detection times, complicated sample preparation, expensive equipment, and comparatively high operating costs.…”

Recent Advances in the Selective Transport and Recovery of Metal Ions using Polymer Inclusion Membranes

“…Too much addition of plasticizers can lead to decreased mechanical strength and reduced transport performance of PIMs for metal ions. [ 13 ] In general, good plasticizers usually have the characteristics of a high dielectric constant, low volatility, low viscosity, and good compatibility with the base polymer. [ 33 ] Studies have shown that the initial flux values of PIM improve with decreasing viscosity and increasing dielectric constant of the plasticizer.…”

“…Numerous studies have demonstrated that the transport of target species is impossible without the presence of a carrier. [ 13 ] Tables 1 – 4 list a quantity of recently studied carriers and the corresponding base polymers and plasticizers applied in PIM composition, as well as the target metal species.…”

“…Moreover, in the process of using PIM to separate metals, membrane fouling is often caused by metal adsorption on the membrane, which is also a significant factor contributing to the decreased stability of membrane transport. For example, Wang et al [60] found that a considerable amount of Cr (VI) remained in PIM during the process of Cr (VI) transport by PVDF-HFP-based The PIM lost 34.6% of efficiency after 6 cycles (24 h each cycle) [13] Aliquat 336/PVDF-HFP V (V) Extraction and stripping efficiencies decreased by 3.2% and 1.1% after 5 cycles (24 h each cycle) [62] Aliquat PIM using 2-NPOE as plasticizer and Cyphos IL101 as carrier without an electric field applied. FTIR spectra observed a clear Cr=O characteristic band on the PIM, which was attributed to incomplete Cr (VI) transport on the membrane.…”

“…The base polymer imparts mechanical strength to the PIM, while the plasticizer confers elasticity and flexibility. [13,14] Compared to SLMs combined by surface tension or weak capillary force, PIM exhibits exceptional stability in long-term applications and is considered a sustainable and eco-friendly substitute for traditional solvent extraction and SLMs. [8] However, compared to the solvent extraction method, PIM allows for simultaneous extraction and back-extraction processes, significantly reducing metal recovery time and saving a substantial amount of carriers.…”