Development of Cellulose Acetate Microcapsules with Cyanex 923 for Phenol Removal from Aqueous Media

Abstract

Microcapsules of cellulose acetate with Cyanex 923 were prepared and used in this study for phenol removal from water and synthetic textile wastewater. The influence of several factors on the microcapsules extraction efficiency was studied, as well as characterization and phenol adsorption isotherm. Microcapsules characterization demonstrated the extractant reagent encapsulation, while in a batch mode procedure, good adsorption of phenol (ca. 5.5 × 10−3 mol Kg−1) has been reached. A slight decrease in phenol extraction percentage was obtained when synthetic textile wastewater was used (ca. 4.955 × 10−3 mol Kg−1), although a decrease in color was observed due to dye microcapsule extraction. Results indicate that this method is a promising alternative to conventional phenol removal technologies for aqueous samples of low phenol concentrations or in textile effluents.

Coaxial Fibres Incorporated with Phase Change Materials for Thermoregulation Applications

“…Their primary purpose in these applications is to prevent damage caused by abrupt temperature changes, thus lowering the energy per area needed for heating/cooling these materials. PCMs can be incorporated directly [17,18] or encapsulated [19,20]. Drissi et al [21] carried out various studies with PCMs applied directly or encapsulated and, in response, the direct application method caused the PCMs to leak, thus inhibiting water migration and interfering with the hydration process, thereby negatively affecting the development of the materials' strength [22].…”

Coaxial Fibres Incorporated with Phase Change Material for Thermoregulation Applications

“…Their primary purpose in these applications is to prevent damage caused by abrupt temperature changes, thus lowering the energy per area needed for heating/cooling these materials. PCMs can be incorporated directly [17,18] or encapsulated [19,20]. S. Drissi et al [21] carried out various studies with PCM applied directly or encapsulated and, in response, the direct application method caused PCM to leak, inhibiting water migration and interfering with the hydration process, negatively affecting the development of the material's strength [22].…”