The concentrating of alizarin using a reverse osmosis process | Zendy

S.S. Madaeni | Zendy; Hossein Daneshvar | Zendy

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The concentrating of alizarin using a reverse osmosis process

Author(s) -

S.S. Madaeni,

Hossein Daneshvar

Publication year - 2005

Publication title -

journal of the serbian chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.227

H-Index - 45

eISSN - 1820-7421

pISSN - 0352-5139

DOI - 10.2298/jsc0501107m

Subject(s) - reverse osmosis , alizarin , fouling , forward osmosis , chemistry , membrane , chromatography , flux (metallurgy) , membrane fouling , osmosis , osmotic power , filtration (mathematics) , analytical chemistry (journal) , chemical engineering , nuclear chemistry , engineering , biochemistry , mathematics , organic chemistry , statistics

Membrane technologies in general and reverse osmosis in particular have been employed for the concentrating of solutions. In this study, the concentrating of a heat sensitive alizarin extracted from madder root was realized using an FT30 re- verse osmosis membrane. The effects of cross flow velocity, transmembrane pres- sure and pH on the flux and rejection were studied. Increasing the transmembrane pressure increased the flux while the rejection was constant. At pH 7-8, the highest flux was achieved. This study showed that reverse osmosis is the process of choice for the concentrating of alizarin solutions. The optimum operating conditions were 1.0 m/s crossflow velocity, 16 bars transmembrane pressure and pH 7. The system was tested for 12 h without severe fouling problems.

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