English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Cloud point extraction (CPE) experiments were carried out for separation of copper(II) from aqueous saline sulphate medium with the Schiff's base chelating extractant, N,N′-bis(salicylidene)ethylenediamine (H 2 SALEN), using the polyethoxylated alcohol Tergitol 15-S-7 as a biodegradable non-ionic surfactant. The obtained results were compared with those previously obtained in presence of Triton X-100. The effects of the main experimental parameters such as  pH , extractant concentration, and non-ionic surfactant concentration on the cloud point extraction behavior of copper(II) with H 2 SALEN were studied and discussed. The use of both systems namely, Triton X-100/H 2 SALEN/Na 2 SO 4  and Tergitol 15-S-7/H 2 SALEN/Na 2 SO 4 , led to very good extraction efficiency and concentrating ability for Cu(II) pollutant. Indeed, nearly 100 % extraction efficiency with a minimal volume fraction of the surfactant-rich phase, ϕ s , was achieved at pH 7.25 and 8 in the systems Tergitol 15-S-7/H 2 SALEN/Na 2 SO 4  and Triton X-100/H 2 SALEN/Na 2 SO 4 , respectively. The Tergitol 15-S-7/H 2 SALEN/Na 2 SO 4  extraction system was found to be more efficient for Cu(II) removal compared to Triton X-100/H 2 SALEN/Na 2 SO 4  system, providing higher concentration factor,  C   f  , and a lesser separation temperature,  T   s  . The analysis of the extraction data revealed that the cloud point process of copper proceeds via a cation exchange mechanism. The stoichiometry of the extracted complexes was ascertained by the Yoe-Jones mole ratio method having a composition of 1 : 1 [Cu: H 2 SALEN].

tenside surfactants detergents

A Comparative Study on the Cloud Point Extraction Behavior of Copper(II) from Sulphate Medium by N,N′-Bis(Salicylidene)Ethylenediamine using Triton X-100 and Tergitol 15-S-7 as Non-ionic Surfactants