Preparation of hydrazinodeoxycellulose and carboxyalkyl hydrazinodeoxycelluloses and their adsorption behavior toward heavy metal ions

✍ Scribed by Shigeo Nakamura; Masato Amano

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 125 KB
• Volume: 35
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19971130)35:16<3359::aid-pola3>3.0.co;2-n

✦ Synopsis

Nitrogen-containing cellulose derivatives hydrazinodeoxycellulose (HDC) and carboxyalkyl hydrazinodeoxycelluloses ( aand b-CAHDCs) were prepared from 6chlorodeoxycellulose (CDC). Their adsorption of divalent transition metal ions was determined from dilute aqueous solutions and compared with that of aminoalkyl celluloses (AmACs) reported previously. HDC scarcely adsorbs metal ions in the pH range of 1-2, whereas aand b-CAHDCs adsorb metal ions in this pH range. However, the adsorption of metal ions on HDC increases rapidly with increasing pH and HDC more effectively adsorbs metal ions than aand b-CAHDCs in weakly acidic conditions. The ability to adsorb Cu 2/ ions was in the order of AmAC (carbon number in the diamine moiety m Å 2) ú HDC ú a-CAHDC ú b-CAHDC in the weakly acidic region. These adsorbents selectively adsorb Cu 2/ ions from the solutions containing other metal ions such as Mn 2/ , Co 2/ , and Ni 2/ , and the Irving-Williams series is obeyed in these adsorbent/metal ion systems.