Abstract
Recovery of reactive dyes from effluent streams is a growing environmental challenge. In this study, various charged regenerated cellulose (RC) ultrafiltration (UF) membranes were prepared and tested for removal of three model reactive dyes (reactive red ED-2B, reactive brilliant yellow K-6G, and reactive brilliant blue KN-R). Data were obtained with charged UF membranes having different spacer arm lengths between the base cellulose and the charge functionality. The effects of charge density of the dye molecules, ionic strength of the feed solution, spacer arm length of charged membranes and filtrate flux were studied. Results indicated that dye retention was greatest with the most negatively charged dye molecule. Higher rejection was also observed in low ionic strength solutions. Results were consistent with model calculations based on the partitioning of a charged sphere into a charged cylindrical pore. The membranes with longer spacer arm length had higher rejection coefficients, consistent with the greater negative charge on these membranes. This study confirms that charged UF membranes can effectively recover small reactive dye molecules at low pressures (below 100. kPa) under appropriate solution conditions due to the strong electrostatic repulsion from the membrane pores.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 58-64 |
| Number of pages | 7 |
| Journal | Journal of Hazardous Materials |
| Volume | 284 |
| DOIs | |
| State | Published - Mar 2 2015 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Environmental Engineering
- Environmental Chemistry
- Waste Management and Disposal
- Pollution
- Health, Toxicology and Mutagenesis
Cite this
}
Recovery of small dye molecules from aqueous solutions using charged ultrafiltration membranes. / Chen, Xiuwen; Zhao, Yiru; Moutinho, Jennifer; Shao, Jiahui; Zydney, Andrew L.; He, Yiliang.
In: Journal of Hazardous Materials, Vol. 284, 02.03.2015, p. 58-64.Research output: Contribution to journal › Article
TY - JOUR
T1 - Recovery of small dye molecules from aqueous solutions using charged ultrafiltration membranes
AU - Chen, Xiuwen
AU - Zhao, Yiru
AU - Moutinho, Jennifer
AU - Shao, Jiahui
AU - Zydney, Andrew L.
AU - He, Yiliang
PY - 2015/3/2
Y1 - 2015/3/2
N2 - Recovery of reactive dyes from effluent streams is a growing environmental challenge. In this study, various charged regenerated cellulose (RC) ultrafiltration (UF) membranes were prepared and tested for removal of three model reactive dyes (reactive red ED-2B, reactive brilliant yellow K-6G, and reactive brilliant blue KN-R). Data were obtained with charged UF membranes having different spacer arm lengths between the base cellulose and the charge functionality. The effects of charge density of the dye molecules, ionic strength of the feed solution, spacer arm length of charged membranes and filtrate flux were studied. Results indicated that dye retention was greatest with the most negatively charged dye molecule. Higher rejection was also observed in low ionic strength solutions. Results were consistent with model calculations based on the partitioning of a charged sphere into a charged cylindrical pore. The membranes with longer spacer arm length had higher rejection coefficients, consistent with the greater negative charge on these membranes. This study confirms that charged UF membranes can effectively recover small reactive dye molecules at low pressures (below 100. kPa) under appropriate solution conditions due to the strong electrostatic repulsion from the membrane pores.
AB - Recovery of reactive dyes from effluent streams is a growing environmental challenge. In this study, various charged regenerated cellulose (RC) ultrafiltration (UF) membranes were prepared and tested for removal of three model reactive dyes (reactive red ED-2B, reactive brilliant yellow K-6G, and reactive brilliant blue KN-R). Data were obtained with charged UF membranes having different spacer arm lengths between the base cellulose and the charge functionality. The effects of charge density of the dye molecules, ionic strength of the feed solution, spacer arm length of charged membranes and filtrate flux were studied. Results indicated that dye retention was greatest with the most negatively charged dye molecule. Higher rejection was also observed in low ionic strength solutions. Results were consistent with model calculations based on the partitioning of a charged sphere into a charged cylindrical pore. The membranes with longer spacer arm length had higher rejection coefficients, consistent with the greater negative charge on these membranes. This study confirms that charged UF membranes can effectively recover small reactive dye molecules at low pressures (below 100. kPa) under appropriate solution conditions due to the strong electrostatic repulsion from the membrane pores.
UR - http://www.scopus.com/inward/record.url?scp=84911384309&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84911384309&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2014.10.031
DO - 10.1016/j.jhazmat.2014.10.031
M3 - Article
C2 - 25463218
AN - SCOPUS:84911384309
VL - 284
SP - 58
EP - 64
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
SN - 0304-3894
ER -