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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 11, No. 5, 2014, pp. 1237-1248
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Bioline Code: st14121
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 11, No. 5, 2014, pp. 1237-1248
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Separation of ternary sodium chloride/Reactive Black-5 aqueous solutions using two different modules in a nanofiltration pilot plant
Patel, T.M. & Nath, K.
Abstract
Nanofiltration of ternary mixtures of sodium
chloride and aqueous solutions of Reactive Black-5 was
studied in two different modules, namely, flat sheet and
spiral wound over a wide range of operating conditions.
Hydrophilized polyamide membrane with molecular
weight cutoff of 150 was used for the experiments. Combined
effect of dye and salt concentration, trans-membrane
pressure drop, initial pH of feed solution on the permeate
flux, and observed retention were investigated. Extent of
color removal, chemical oxygen demand (COD), total
dissolved solid (TDS), and conductivity were determined
to assess performance of the membrane. The experimental
results showed that both the permeate flux and observed
retention decreased with increase in dye as well as salt
concentration in the feed. Permeate fluxes were lower at
higher pH values. Substantial removal of color was
achieved in the nanofiltration experiments with a marked
reduction in COD and TDS. The process allowed the
production of permeate stream with great reutilization
possibilities.
Keywords
Membrane; Salt rejection; Permeate; Chemical oxygen demand; pH; Transmembrane pressure
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