scholarly journals Decolorization of reactive violet 5 dye in textile wastewater by electrocoagulation

2016 ◽  
Vol 6 (1) ◽  
pp. 67 ◽  
Author(s):  
Borislav N. Malinovic ◽  
Miomir G. Pavlovic
Keyword(s):  
Electrolyte Concentration ◽  
Batch Reactor ◽  
Supporting Electrolyte ◽  
Reactive Dyes ◽  
Textile Wastewater ◽  
Operating Parameters ◽  
Textile Dye ◽  
Dye Wastewater ◽  
Textile Dyeing ◽  
Finishing Processes

<span lang="EN-US">The textile dyeing industry consumes large quantities of water and produces large volumes of wastewater from different steps in the dyeing and finishing processes. Wastewater from printing and dyeing units is often rich in color, containing residues of reactive dyes and chemicals, such as complex components. This study investigates the decolorization of synthetic dye wastewater containing textile dye Reactive Violet 5 (RV5) by electrocoagulation. A laboratory batch reactor was used to investigate the effect of various operating parameters using aluminium (Al), iron (Fe) and stainless steel (SS) anode. The effect of dye concentration, current density, supporting electrolyte, sup­porting electrolyte concentration, electrolysis duration, and material of anode of the systems were evaluated. Color removal efficiency was 22, 91.5 and 99.8 % in 15 minutes using Al, Fe and SS anode, respectively (j = 10 mA/cm<sup>2</sup>, c<sub>NaCl </sub>= 0.171 M).</span>

scholarly journals Electrochemical treatment of dye wastewater using nickel foam electrode

2021 ◽  
Author(s):  
Saravanathamizhan Ramanujam ◽  
Kaavya Muthumanickam
Keyword(s):  
Stainless Steel ◽  
Electrolyte Concentration ◽  
Nickel Foam ◽  
Supporting Electrolyte ◽  
Electrochemical Treatment ◽  
Operating Parameters ◽  
Subsequent Stage ◽  
Dye Wastewater ◽  
Solid Liquid ◽  
Solid Liquid Separation

Removal of dye from wastewater has been investigated using the electrocoagulation method. Batch experiment has been conducted to remove the color from synthetically prepared acid red 87dye wastewater. Stainless steel and nickel foam sheets are used as cathode and anode, respectively. The effect of some operating parameters, such as current density, initial dye concentration and supporting electrolyte concentration, on color removal has been studied. It can be observed from the present investigations that the nickel foam electrode effectively removes color from the wastewater. Nickel hydroxyl species formed during the operation and also, nickel (II) hydroxide flocs formed in a subsequent stage, trap colloidal precipitates and make solid-liquid separation easier during the flotation stage. These stages of electrocoagulation must be optimized to design an economically feasible process.

A constructed wetland model for synthetic reactive dye wastewater treatment by narrow-leaved cattails (Typha angustifolia Linn.)

2009 ◽  
Vol 60 (6) ◽  
pp. 1565-1574 ◽  
Author(s):  
S. Nilratnisakorn ◽  
P. Thiravetyan ◽  
W. Nakbanpote
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Cell Structure ◽  
Salt Content ◽  
Textile Wastewater ◽  
Reactive Dye ◽  
Wastewater Management ◽  
Textile Dye ◽  
Dye Wastewater ◽  
Term Operation

Textile wastewater is contaminated by reactive dye causing unattractive levels of wastewater color, high pH and high salt content when discharged into public water systems. Decolorization of textile wastewater by plant, phytoremediation, is an alternative, sustainable method which is suitable for long term operation. Narrow-leaved cattails are one species of wetland plant with efficiency for decolorizing and remediating textile wastewater. In addition, chemical oxygen demand (COD) can be lowered and dye residue can be removed. The plant also showed a good salt tolerance even after being exposed to a salt solution for 15 days. The narrow-leaved cattails were set up in a constructed wetland model with a vertical flow system operating from bottom to top for synthetic reactive dye wastewater (SRDW) removal. Narrow-leaved cattails could achieve the removal of SRDW at approximately 0.8 gSRDW m−2 day−1. Decolorization of SRDW by this plant was approximately 60%. The advantage of this method is that it is suitable for textile wastewater management and improvement of wetland. These plants could lower COD, remove dye, sodium and total dissolved solids (TDS) whereas other biological and chemical methods could not remove TDS and dye in the same time. These results suggested that the spongy cell structure of this plant has the ability to absorb large amounts of water and nutrients. Physico-chemical analysis revealed increasing amounts of sulfur, silicon, iron and calcium in the plant leafs and roots after exposure to wastewater. Proteins or amide groups in the plant might help in textile dye removal. Regarding decolorization, this plant accumulates dye in the intercellular space and still grows in this SRDW condition. Hence, it can be noted here that narrow-leaved cattails are efficient for textile dye wastewater treatment.

Bio-kinetic analysis on treatment of textile dye wastewater using anaerobic batch reactor

2011 ◽  
Vol 102 (2) ◽  
pp. 627-632 ◽  
Author(s):  
G. Gnanapragasam ◽  
M. Senthilkumar ◽  
V. Arutchelvan ◽  
T. Velayutham ◽  
S. Nagarajan
Keyword(s):  
Kinetic Analysis ◽  
Batch Reactor ◽  
Textile Dye ◽  
Dye Wastewater

scholarly journals CHALLENGES IN TEXTILE WASTEWATER AND CURRENT PALLIATIVE METHODS: AN OVERVIEW

2017 ◽  
Vol 18 (2) ◽  
pp. 71-78
Author(s):  
Ibrahim Adebayo Bello
Keyword(s):  
Oxygen Demand ◽  
Textile Wastewater ◽  
Wastewater Management ◽  
Textile Dye ◽  
Biological Processes ◽  
Dye Wastewater ◽  
High Concentration ◽  
Efficient Treatment ◽  
The Past ◽  
Textile Industries

Effluents from dye and textile industries are highly contaminated and toxic to the environment. High concentration of non-biodegradable compounds contributes to increased biochemical oxygen demand (BOD) and chemical oxygen demand (COD) of the wastewater bodies.  Dyes found in wastewater from textile industries are carcinogenic, mutagenic or teratogenic. Biological processes involving certain bacteria, fungi, activated carbon and carbon nanotubes (CNTs) are promising methods for treating the waste water. These methods are either inefficient or ineffective.  These complexities necessitates search for new approaches that will offset all the shortcomings of the present solutions to the challenges faced with textile wastewater management. This article reviews the past and recent methods used in the treatment of the textile dye wastewater and the future opportunities for efficient treatment of textiles wastewaters.

scholarly journals Decolorization of model wastewater by adsorbent obtained from waste hemp fibers

2019 ◽  
Vol 25 (1) ◽  
pp. 11-19
Author(s):  
Sandra Konstantinovic ◽  
Marija Kodric ◽  
Radica Nicic ◽  
Dragan Djordjevic
Keyword(s):  
Dye Adsorption ◽  
Effect Of Temperature ◽  
Maximum Adsorption Capacity ◽  
Textile Dye ◽  
Dye Wastewater ◽  
Hemp Fibers ◽  
Porous Particles ◽  
Textile Dyeing ◽  
Nonlinear Form ◽  
Positive Effect

Water pollution has already become a significant worldwide problem, especially in the textile dyeing industry. This paper describes decolorization of dye water modelled by textile dye wastewater. Decolorization was performed on an adsorbent made from physicochemically modified waste hemp fibers, obtained as a by-product from the production of ropes. The adsorbent is relatively dispersive and contains heterogeneous porous particles, with carbon as a dominant element. Obtained results have shown that the positive effect of adsorption directly depends on contact time, pH, temperature, and initial dye concentration. Dye concentration decreases in time, especially when the used concentration is the initial one. The effect of temperature below 40 ?C is not significant, but adsorption gets more intensive when performed at 60 ?C. The higher degree of decolorization is achieved at lower initial dye concentrations, although the highest initial dye concentration leads to higher dye adsorption. The experimental results of adsorption were described by using the Langmuir model. The maximum adsorption capacity ranges from 1.98 to 2.13 mg g-1 for linear and 2.03 to 2.12 mg g-1 for nonlinear form.

Study on Electrochemical Degradation of Acid Scarlet 3R

2011 ◽  
Vol 71-78 ◽  
pp. 3071-3074
Author(s):  
Jun Sheng Hu ◽  
Yue Li ◽  
Zhuo Wang
Keyword(s):  
Current Density ◽  
Electrolyte Concentration ◽  
Ph Value ◽  
Removal Rate ◽  
Supporting Electrolyte ◽  
Color Removal ◽  
Alkaline Condition ◽  
Dye Wastewater ◽  
Initial Concentration ◽  
Initial Ph

Based on a static experiment, this study researched the electrochemical oxidation process of simulated dye wastewater containing Acid Scarlet 3R in the two-dimensional electrolysing cell. This experiment investigated the effect of such various factors as current density, initial concentration, supporting electrolyte concentration, and the initial pH value on the color removal. The results of the experiment clearly indicated that the rate of color removal increased when the current density was increasing gradually; it decreased when the initial concentration was increasing; it originally increased and then decreased when concentration of electrolytes was increasing; alkaline condition was not conducive to the removal of color, and the effect of decolorization was better under an acid condition than under an alkaline condition. The optimum condition of disposing of dye wastewater is when the current density is 7Am/cm², electrolyte concentration is 0.04mol/L, pH=2.5, under the condition of which the color removal rate could be 96.06%.

The Use of Constructed Wetlands for Treating Industrial Effluent (Textile Dyes)

1994 ◽  
Vol 29 (4) ◽  
pp. 227-232 ◽  
Author(s):  
T. H. Davies ◽  
P. D. Cottingham
Keyword(s):  
Constructed Wetlands ◽  
Industrial Wastewater ◽  
Industrial Effluent ◽  
Chemical Oxidation ◽  
Textile Dye ◽  
Dye Wastewater ◽  
Reed Beds ◽  
Textile Dyeing ◽  
Wide Range ◽  
Processing Water

Constructed wetlands bave the capability to treat industrial wastewater containing a wide range of chemicals, including priority pollutants such as phenols and cresols, by processes such as absorption and bacterial breakdown, chemical oxidation, adsorption onto the bed matrix and sedimentation. A brief overview of this technique is presented along with details of preliminary trials carried out on textile dyeing and processing water. The trials were conducted in a horizontal flow, gravel bed reed (30m × 5m), located in Melbourne, Australia. The textile dye wastewater was applied at an influent rate of 10 1/min., resulting in a retention time in the reed beds of 3–4 days, results indicated that breakdown of the visible dye occurred mainly in the first one third of the bed.

Polishing of pretreated dye wastewater using novel sequencing batch reactors

2008 ◽  
Vol 58 (2) ◽  
pp. 407-411
Author(s):  
K. S. Singh ◽  
M. M. LeBlanc ◽  
D. Bhattacharyya
Keyword(s):  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Textile Wastewater ◽  
Batch Reactors ◽  
Dye Wastewater ◽  
Sequencing Batch Reactors ◽  
Cycle Times ◽  
Reactor Technology ◽  
Discrete Phase ◽  
Operation Cycle

Novel, aerobic sequencing batch reactor technology was tested as a polishing step for anaerobically treated textile wastewater containing dye. Operation cycle times of 6, 8 and 12 hours were studied using discrete phase periods. The SBRs were able to further remove influent dye concentration of as little as 5 mg/L, and remove highly variable loadings of COD and SS to effluent levels of 100 and 20 mg/L respectively.

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