Removal of Sodium Dodecylbenzenesulfonate by Macroporous Adsorbent Resins

Abstract

Among the surfactants used for removal of radioactive nuclides generated from nuclear decontamination, sodium dodecylbenzenesulfonate (SDBS) is frequently used. A potential environmental problem of incomplete elimination of SDBS from radioactive liquid wastes (RLWs), which contain a high concentration of SDBS and radioactive nuclides, still remains. Removal of SDBS was evaluated by adsorption using commercially available, macroporous polymer-based adsorbents, HP20 and HP2MGL, which are styrene (St)- and methyl methacrylate (MMA)-based crosslinked resin beads, respectively. The effect of the macroporosity and chemical structure of the macroporous adsorbent resins (MARs) on the adsorption behavior was investigated. HP20 did not have any functionality for adsorbing SDBS, but it showed effective adsorption toward SDBS (less than 20 min to reach 90% adsorption), because of the hydrophobic interaction between the phenyl groups in the St unit in HP20 and in the SDBS. The removal of SDBS from a mixed solution of SDBS and Cs ions was investigated to elucidate the adsorption process in an imitation of the sort of RLWs. This investigation suggests that MARs can potentially be used for the removal of SDBS not only from a SDBS solution but also from a mixed solution of SDBS and Cs ions.

Adsorption/Desorption Characteristics and Simultaneous Enrichment of Orientin, Isoorientin, Vitexin and Isovitexin from Hydrolyzed Oil Palm Leaf Extract Using Macroporous Resins

“…It offers an alternative to conventional methods, which often start with solid-liquid extraction, followed by liquid-liquid extraction and eventually column chromatography [14]. These conventional approaches are not only time-consuming and inefficient, but they also require high consumption of solvents and energy [15,16]. The chemical nature of MARs allows them to selectively adsorb through hydrogen bonding and Van der Waals interactions with benzene rings and hydrogen groups present in the molecular structure of the targeted flavonoids [17].…”

Enrichment and Purification of Aucubin from Eucommia ulmoides Ionic Liquid Extract Using Macroporous Resins

“…Liquid–liquid extraction using various solvents has been commonly used for the isolation of target analytes from solution, followed by a chromatographic process with a gradient or isocratic system [ 1 ]. Nevertheless, large solvent consumption, high energy consumption, high labor intensities, low recovery, and even safety problems, limit this method for large-scale industrial applications [ 2 ]. Therefore, a macroporous resin adsorption technology was developed for the enrichment and purification of target analytes from plant extracts.…”