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Table 1 Physical properties of the adsorbents employed in the adsorption process

From: Purification and biocompatibility of fermented hyaluronic acid for its applications to biomaterials

Model name Morphology Particle size (μm; d10, d50, d90)* Iodine number Methylene blue adsorption (g/100 g) B.E.T.** (m2/g) pH Moisture (%)
Darco KB-B Powder 4, 15, 40 - 42 2050 2 ≤15%
Norit CN1 Powder 7, 30, 76 - 29 1400 5.5 ~ 8 ≤15%
Norit SX Plus Powder 6, 20, 80 1050 22 1100 Neutral ≤10%
Norit SX 1G Powder 5, 25, 90 900 18 1000 Neutral ≤10%
Norit C Gran Granule 0.85 mm ~ 1.7 mm*** - 30 1400 2 ~ 8 ≤15%
Norit GAC 1240+ Granule 0.43 mm ~ 2.0 mm*** 1025 22 1125 Neutral ≤3%
Norit C Extra USP Powder 4, 23, 100 1100 22 1200 Neutral ≤10%
Norit A Supra EUR Powder 4, 20, 100 1550 41 1700 Neutral ≤10%
Alumina Powder 2.5, 6, 10 - - 103 - -
  1. *The particle sizes (diameter) indicated that their actual sizes are less than those given.
  2. **Total surface area.
  3. ***More than 95% have the granule sizes indicated.
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