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Treatment of Wastewater Containing Direct-Scarlet Dye by Iron-Based Coagulant

Chao Zhou

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Abstract

Two kinds of iron-based coagulant-Fe(NO3)3·9H2O and FeSO4·7H2O are used to remove COD and colourity from direct-scarlet-dye-containing wastewater on laboratory scale.The results showed both of the coagulants were efficient in decolorization,especially Fe(NO3)3·9H2O,with its decolorization rate above 86%.Their capabilities of removing COD were also tested under different conditions with respect to dosage and pH value.It has been showed that pH 8 was the best for Fe(NO3)3·9H2O in decolorization,while within pH range of 6~8 decolorization rate of FeSO4·7H2O could be above 80%,and the peak rate reached 83.2% at pH 8.

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What this paper is about

Two kinds of iron-based coagulant-Fe(NO3)3·9H2O and FeSO4·7H2O are used to remove COD and colourity from direct-scarlet-dye-containing wastewater on laboratory scale.The results showed both of the coagulants were efficient in decolorization,especially Fe(NO3)3·9H2O,with its decolorization rate above 86%.Their capabilities of removing COD were also tested under different conditions with respect to dosage and pH value.It has been showed that pH 8 was the best for Fe(NO3)3·9H2O in decolorization,while within pH range of 6~8 decolorization rate of FeSO4·7H2O could be above 80%,and the peak rate reached 83.2% at pH 8.

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Available abstract

Two kinds of iron-based coagulant-Fe(NO3)3·9H2O and FeSO4·7H2O are used to remove COD and colourity from direct-scarlet-dye-containing wastewater on laboratory scale.The results showed both of the coagulants were efficient in decolorization,especially Fe(NO3)3·9H2O,with its decolorization rate above 86%.Their capabilities of removing COD were also tested under different conditions with respect to dosage and pH value.It has been showed that pH 8 was the best for Fe(NO3)3·9H2O in decolorization,while within pH range of 6~8 decolorization rate of FeSO4·7H2O could be above 80%,and the peak rate reached 83.2% at pH 8.

Key concepts: Wastewater, Chemistry, Pulp and paper industry, Nuclear chemistry, Coagulation, Environmental engineering, Environmental science, Engineering

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Treatment of Wastewater Containing Direct-Scarlet Dye by Iron-Based Coagulant — Research Paper | ScholarLens