Positively charged microporous ceramic membrane for the removal of Titan Yellow through electrostatic adsorption

Publication date: Available online 15 January 2016
Source:Journal of Environmental Sciences
Author(s): Xiuting Cheng, Na Li, Mengfu Zhu, Lili Zhang, Yu Deng, Cheng Deng
To develop a depth filter based on the electrostatic adsorption principle, positively charged microporous ceramic membrane was prepared from a diatomaceous earth ceramic membrane. The internal surface of the highly porous ceramic membrane was coated with uniformly distributed electropositive nano-Y2O3 coating. The dye removal performance was evaluated through pressurized filtration tests using Titan Yellow aqueous solution. It showed that positively charged microporous ceramic membrane exhibited a flow rate of 421L/(m²·hr) under the trans-membrane pressure of 0.03bar. Moreover it could effectively remove Titan Yellow with feed concentration of 10mg/L between pH3 to 8. The removal rate increased with the enhancement of the surface charge properties with a maximum rejection of 99.6%. This study provides a new and feasible method of removing organic dyes in wastewater. It is convinced that there will be a broad market for the application of charged ceramic membrane in the field of dye removal or recovery from industry wastewater.

Graphical abstract

from #Ἀθηνᾶ via ola Kala on Inoreader http://ift.tt/1lhQdnc
via IFTTT