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2006•Journal of Fujian Normal UniversityRequires access

Studies on Treatment of Dyeing Wastewater with Polysilic Aluminium Ferric Flocculants

Yuman Lin

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Abstract

The polysilic aluminium ferric flocculants were prepared from bauxite sludge.Its flocculating effects were studied.The flocculating test of anthraquinone disperse yellow solution of pH 6～10 resulted in about 90% reduction for color by 1.0 mL/L flocculants of n(Al)∶n(Fe)=1.0,n(M)∶n(SiO_2)=1.0.The flocculants were applied to treat industrial dyeing wastewater,and results showed that the color removal rate was about 90% when the flocculants of n(Al)∶n(Fe)=1.0～3.0,n(M)∶n(SiO_2)=1.0 by 2.0 mL/L were used.These flocculants were much better than PAC in removal rate of COD_(Cr) when treating dyeing wastewater.In addition,the flocculating mechanism was also discussed.

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The polysilic aluminium ferric flocculants were prepared from bauxite sludge.Its flocculating effects were studied.The flocculating test of anthraquinone disperse yellow solution of pH 6～10 resulted in about 90% reduction for color by 1.0 mL/L flocculants of n(Al)∶n(Fe)=1.0,n(M)∶n(SiO_2)=1.0.The flocculants were applied to treat industrial dyeing wastewater,and results showed that the color removal rate was about 90% when the flocculants of n(Al)∶n(Fe)=1.0～3.0,n(M)∶n(SiO_2)=1.0 by 2.0 mL/L were used.These flocculants were much better than PAC in removal rate of COD_(Cr) when treating dyeing wastewater.In addition,the flocculating mechanism was also discussed.

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Available abstract

The polysilic aluminium ferric flocculants were prepared from bauxite sludge.Its flocculating effects were studied.The flocculating test of anthraquinone disperse yellow solution of pH 6～10 resulted in about 90% reduction for color by 1.0 mL/L flocculants of n(Al)∶n(Fe)=1.0,n(M)∶n(SiO_2)=1.0.The flocculants were applied to treat industrial dyeing wastewater,and results showed that the color removal rate was about 90% when the flocculants of n(Al)∶n(Fe)=1.0～3.0,n(M)∶n(SiO_2)=1.0 by 2.0 mL/L were used.These flocculants were much better than PAC in removal rate of COD_(Cr) when treating dyeing wastewater.In addition,the flocculating mechanism was also discussed.

Key concepts: Flocculation, Ferric, Aluminium, Pulp and paper industry, Nuclear chemistry, Wastewater, Chemistry, Dyeing

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