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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.