wastewater decoloration Articles
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Decolorization and degradation of reactive dye during the dyed cotton fabric rinsing process
Dyeing process of textile consumes large quantities of water, which results in huge amounts of colored wastewater. Most of the dye wastewater treating methods focused on the treatment of wastewater after the rinsing process of dyed textile. In this paper, tetraacetylethylenediamine/hydrogen peroxide (TAED/H2O2) active oxidation (AO) system was developed to rinse dyed textile and decolorize the ...
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Optimization of Fenton process for decoloration and COD removal in tobacco wastewater and toxicological evaluation of the effluent
Decoloration and chemical oxygen demand (COD) removal in tobacco wastewater by Fenton process has been optimized under 25 ± 2 °C. The results showed that the optimal range of conditions were pH 4.13–4.66, Fe2+ 0.29–0.34 g/L and H2O2 ≥ 2.73 g/L. Within this range, up to 95% of colour and 90% of COD was removed. In an enlarged system, setting the optimal conditions as pH 4.50, Fe2+ 0.34 g/L and ...
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Clays for heterogeneous photocatalytic decolorization of wastewaters contaminated with synthetic dyes: a review
Photocatalysis is one of the most environment-friendly and technologically viable advanced oxidation processes. Compared to conventional thermal, biological, and physicochemical treatments, photocatalytic processes have more moderate reaction conditions and higher efficiency. They are a promising technology for the treatment of dye wastewaters, particularly those that have toxic and high ...
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Optimization of material and energy consumption for removal of Acid Red 14 by simultaneous electrocoagulation and electroflotation
Decolorization of wastewater of industries which consume dye is an environmental priority. Electrocoagulation and electroflotation methods are appropriate for treatment of these wastewaters. This study investigates the effect of four parameters, electrical conductivity, current density, initial dye concentration, and initial pH, on the performance of a simultaneous ...
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Decolorization of azo dyes with high salt concentration by salt-tolerant mixed cultures under anaerobic conditions
Because the lack of detailed study of biological decolorization in high salt dye wastewater, it is still difficult to evaluate the biological treatment on high-salinity dye wastewater. The experiments were carried out to study the salt-tolerant bacteria, which is useful in the treatment of high-salinity colored wastewater. Simulated wastewater containing 5-150 g/L salt (NaCl) and 50-2000 mg/L ...
By IOS Press
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Enhanced electrochemical oxidation of Acid Red 3R wastewater with iron phosphomolybdate supported catalyst
Electrochemical oxidation of Acid Red 3R (AR3R) was investigated with the new catalyst of iron phosphomolybdate (FePMo12) supported on modified molecular sieves type 4 Å (4A) as packing materials in the reactor. The results of the Fourier transform infrared spectroscopy and X-ray diffraction indicated that the heteropolyanion had a Keggin structure. The optimal conditions for ...
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Catalytic oxidation and spectroscopic analysis of simulated wastewater containing acid chrome blue K by using chlorine dioxide as oxidant
An activated carbon-MnO2 catalyst was prepared by the dipping-calcination method using activated carbon as catalyst support. The catalyst was used for the catalytic oxidation of simulated acid chrome blue K wastewater. The COD removal efficiency and decolor efficiency by catalytic oxidation are 72.0% and 87.8%, respectively, at the condition of wastewater's COD is 2,418 mg/L, the optimum pH value ...
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Decolorization of dyeing wastewater and characterization of flocs during coagulation by a new composite coagulant
A composite coagulant, polymeric aluminum ferric chloride-poly-epichlorohydrin-ethylenediamine (PAFC-EPI-ETA), was synthesized and then used for the treatment of synthetic reactive brilliant red (RBR) dyeing wastewater. Effects of (Fe + Al) to EPI-ETA mass ratio (P) on the color removal and zeta potential were investigated under different coagulant dosages and initial pHs. Experimental ...
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Industrial Wastewater Treatment
Industrial wastewater contains many toxic and harmful substances, which not only pollute the environment, but also endanger human health. Industrial wastewater treatment has always been concerned by people and social. Industrial wastewater is divided into phenol wastewater, mercury-containing wastewater, oil-containing wastewater, heavy metal wastewater, cyanide-containing wastewater, Paper mill ...
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