Extraction and recovery of lignosulfonate from its aqueous solution using bulk liquid membrane

Separation of lignosulfonate from its aqueous solution using supported liquid membrane

“…Various methods such as precipitation, ultrafiltration (UF), ion exchange, dialysis, electrodialysis and liquid-liquid extraction are available for the separation of LS from spent liquor [1][2][3][4][5][6]. However, the merits and demerits of the above methods reported in our previous work [2] are summarized in Table 1.…”

“…However, the merits and demerits of the above methods reported in our previous work [2] are summarized in Table 1. Though there have been satisfactory recoveries (80-90%) of LS by some of these techniques, they suffer severely from drawbacks like precipitate disposal problem or fouling and stability of the polymeric membranes.…”

The synergistic extraction of uranium ions from monazite leach solution via HFSLM and its mass transfer

“…Stokes and Einstein also observed that when viscosity was high, extraction of metal ions decreased. Chakrabarty et al [40] stated that viscosity of the membrane phase increases when extractant concentration is increased, resulting in a decrease of flux. Therefore, 0.1 M TOPO was selected in order to study other variables.…”

Extraction and Transport of Amino Acids Using Kryptofix 5 as Carrier through Liquid Membrane

“…Aer stirring, the mixture was allowed to stand for 5 min for the separation of two phases, and the aqueous phase was analyzed for extracted amino acid by determining the difference in the concentration of amino acid in aqueous phase before and aer extraction. e efficiency of extraction and transport was calculated by using (1), and distribution ratio was calculated by (2) [3,13] …”

“…e carrier-mediated transport of amino acids and metal ions through liquid membrane plays an important role in simulating biological membrane functions and separation technologies because of high transport efficiency, excellent selectivity, and economic advantages of liquid membrane over other separation techniques [1,2].…”