Simultaneous extraction of two dyes selectively onto different resins
Video illustrating how a mixture of red and blue dyes with different chemical properties can be selectively extracted onto different adsorbents within the same run using a rotating bed reactor (RBR). The dyes were separated based on ionic and hydrophobic interactions, respectively.
Conditions: Allura red (40 µM) and methylene blue (13 µM) in deionized water (about 160 mL) were adsorbed onto Amberlite IRA900 Cl (13 mL, 650-820 µm) and Amberlite XAD1600N (13 mL, 400±50 µm), respectively. Each adsorbent was filled into two of the four compartments in a SpinChem® S221 rotating bed reactor (RBR) operated at 800 rpm within a SpinChem® V221 flower-baffled reaction vessel. The total extraction time for one run was nine minutes and the video contains photos of the adsorbents before and after two repeated extractions.