Citation: Chung Shin LU, Chiing Chang CHEN, Ya Ping SU, Kung Tung CHEN. Removal of Safranine from Aqueous Solution by Using Adsorptive Bubble Separation Techniques[J]. Chinese Chemical Letters, ;2005, 16(5): 701-704. shu

Removal of Safranine from Aqueous Solution by Using Adsorptive Bubble Separation Techniques

1.
Department of general education, National Taichung Nursing College, Taichung, Taiwan 403;
2.
Department of general education, Ming Hsin University of Science and Technology, Hsin-Chu, Taiwan 304

Received Date: 18 February 2004

Safranine, a cationic dye, was removed from synthetic wastewater by ion flotation.Over 98% of safranine was removed from the solution in 10 min. A stoichiometric amount of surfactant (1 mol of surfactant to 1 mol of dye) was found to be most effective for safranine removal. The separation efficiency of safranine decreased with increasing concentration of NaNO₃. Safranine was also removed by adsorbing colloid flotation technique using Fe(OH)₃ as the coagulant. Sodium lauryl sulfate was used as the collector, and over 97% of safranine was removed in 5 min. The separation efficiency decreased with increasing ionic strength of the solution. The deleterious effect of neutral salt was compensated somewhat with the aid of A1³⁺ as the activator. Both ion flotation and adsorbing colloid flotation may be applicable in the removal of safranine from wastewater.
- Safranine,
- ion flotation,
- adsorbing colloid flotation
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