Synthesis and characterization of cellulose ion exchanger. II. Pilot scale and utilization in dye–heavy metal removal
✍ Scribed by A. Waly; F. A. Abdel-Mohdy; A. S. Aly; A. Hebeish
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 149 KB
- Volume
- 68
- Category
- Article
- ISSN
- 0021-8995
No coin nor oath required. For personal study only.
✦ Synopsis
Cotton fabric was converted into an ion exchanger by grafting it with (1) glycidyl methacrylate (GMA), followed by aminization with ethylene diamine; (2) dimethylaminoethyl methacrylate (DMAEMA), followed by quaternization; and (3) acrylic acid (AA). Grafting was carried out on a pilot scale using a thiocarbonate-H 2 O 2 redox system. The so-obtained cotton graft copolymers were monitored for their ability to remove different dyes as well as heavy metals from aqueous solutions. It was found that the magnitude of dye exhaustion was as follows. For direct and reactive dyes the percentage of exhaustion follows the order of aminized GMA ú quaternarized DMAEMA ú DMAEMA, whereas for acid dye the percentage of exhaustion follows the order of quaternarized DMAEMA ú DMAEMA ú aminized GMA. On the other hand poly(AA) -cotton copolymer is very effective at removal of the basic dye. With respect to heavy metal ions removal, the copolymers show the following order: AA ú aminized GMA ú quaternarized DMAEMA ú DMAEMA. While dichromate removal follows the order of quaternarized DMAEMA ú DMAEMA ú aminized GMA.