Magnetic Technologies and Green Solvents in Extraction and Separation of Bioactive Molecules Together with Biochemical Objects: Current Opportunities and Challenges

Abstract

Currently, magnetic technology and green solvents are widely used in chemical engineering, environmental engineering and other fields as they are environmentally friendly, easy to operate and highly efficient. Moreover, a magnetic field has positive effect on many physicochemical processes. However, related new methods, materials, strategies and applications in separation science still need to be developed. In this review, a series of meaningful explorations of magnetic technologies for the separation of natural products and biologic objects, including magnetic ionic liquids and other magnetic solvents and fluids, magnetic nanoparticles and magnetic fields, and the development of magnetic separators were reviewed. Furthermore, the difficulties in the application and development of magnetic separation technology were discussed on the basis of comparison and data analysis, especially for the selection of magnetic materials and magnetic field sources. Finally, the progress in the development of magnetic separators was also elaborated for researchers, mainly including that of the new high-efficiency magnetic separator through multi-technology integration and the optimization of traditional magnetic separators, which help current techniques break through their bottleneck as a powerful driving force.

Enhanced Pretreatment of Natural Rubber Industrial Wastewater Using Magnetic Seed Coagulation with Ca(OH)2

“…The highest removals were achieved at 50 mg/L of MS coupled with optimum PAC and PAM dosages for both NaOH and Ca(OH) 2 . Through a variety of external influences including electric double layer forces, gravitational force, Van der Waals forces, Brownian motion, and fluid motion, aggregation MS was altered to produce separation [38]. With the increasing dosage of MS, removal of these pollutants decreased slightly due to the settling of the suspension before the proper coagulation process occurred.…”

“…The incorporation of MS into the coagulation process significantly enhances the rate of sedimentation and reduces the required volume of the sedimentation tank. For example, the regular settling time of conventional coagulation time is 30 min [37,38], and the settling time of the MSC process is less than 5 min [37,39]. The MSC process can be considered as a significant advantage in treatment efficiency as well as a means of saving the capacity of tanks.…”

“…conventional coagulation time is 30 min [37,38], and the settling time of the MSC process is less than 5 min [37,39]. The MSC process can be considered as a significant advantage in treatment efficiency as well as a means of saving the capacity of tanks.…”

Simple Preparation of a Unique Ionic Liquid/Deep Eutectic Solvent and β-Cyclodextrin Composite Discs and Its Use to Capture Hazardous Substances from Water

“…In separation science, more and more ILs and DESs are being successfully applied for their advantages of good selectivity, designability, stability, recyclability, etc. [5].…”

DNA Origami-Based Letterpress Printing of Gold Nanostructures with Predesigned Morphologies

“…Magnetic separation uses magnetic fields to separate substances; it is simple and fast, elutes mildly, and is more convenient to amplify and operate . This technology has been applied to chemical, pharmaceutical, and food separations. − Therefore, we use MBs to design a novel MB-DNA printing plate. Because the MBs used in this study are microsize particles, they have the additional advantage of a large surface area to volume ratio.…”