Removal of cobalt ions from aqueous solutions by polymer assisted ultrafiltration using experimental design approach. part 1: Optimization of complexation conditions

Response surface-optimized removal of Reactive Red 120 dye from its aqueous solutions using polyethyleneimine enhanced ultrafiltration

“…Milli-Q RO water (Millipore, USA) was mainly employed for feed preparation and dilution of test solutions, in accordance with the experimental requirements. The analytical grade polyethyleneimine (PEI) polymeric binding solution, supplied by Sigma Aldrich., USA, yielded satisfactory performance as a chelating agent on direct usage (Cojocaru et al, 2009;Ouni and Dhahbi, 2010). Hence, the claims made by the manufacturer/supplier to its quality were justified, which thereby explained the exclusion of diafiltration process with regard to the pre-treatment of the as-purchased PEI solutions (Chakraborty et al, 2014).…”

“…a constant of protonation using the RSM toolkit explicitly take into account the linear, quadratic and interaction effects of various process factors, thereby resulting in better and pragmatic predictions for near optimal process factor levels in the prescribed region of operability (Chakraborty et al, 2014;Cojocaru et al, 2009). The present study deals with the application of PEUF in the removal of Reactive Red 120 dye from its aqueous solution using a popular water soluble polymeric amine, polyethyleneimine (PEI) known for its excellent chelating abilities due to the presence of donor electron pair on the nitrogen atom, rich content of surface functional groups and commendable chemical stability (Shao et al, 2013).…”

Mesoporous silica (KIT-6) derivatized with hydroxyquinoline functionalities as a selective adsorbent of uranium(VI)

“…Therefore, development of efficient and economically viable methods for uptake of uranium from aqueous solution is desirable [4]. In past decades, various technologies, such as chemical precipitation [5], reverse osmosis [6], solvent extraction [7], micellar ultrafiltration [8] and adsorption, have been developed for the removal of uranium. Among them, sorption offers benefits of simplicity, rapidity, and easy recycling [9].…”

Analysis of an ultrafiltration model: Influence of operational conditions

“…Rojas et al [6] successfully applied ultrafiltration in the removal of viruses and bacteria from surface water destined for human consumption. Other authors studied the removal of heavy metals from aqueous wastestreams with micellar enhanced untrafiltration [7] and polymer assisted ultrafiltration processes [8,9].…”