scholarly journals Electrocoagulation Applied for Textile Dye Oxidation Using Iron Slag as Electrodes

2021 ◽  
Author(s):  
Rafaela De Maman ◽  
Vilson Conrado da Luz ◽  
Laura Behling ◽  
Adriana Dervanoski ◽  
Clarissa Dalla Rosa ◽  
...  
Keyword(s):  
Textile Industry ◽  
Oxygen Demand ◽  
Electrochemical Process ◽  
Blue Dye ◽  
Textile Dye ◽  
Phenol Removal ◽  
Good Efficiency ◽  
Iron Slag ◽  
Indigo Blue ◽  
Textile Factory

Abstract The Indigo Blue dye is widely used in the textile industry, specifically in jeans dyeing, the effluents of which, rich in organic pollutants with recalcitrant characteristics, end up causing several environmental impacts, requiring efficient treatments. Several pieces of research have been conducted in search of effective treatment methods, among which is electrocoagulation. This treatment consists of an electrochemical process that generates its own coagulant by applying electric current on metallic electrodes, bypassing the use of other chemical products. The objective of this work was to evaluate the potential use of iron slag in the electrocoagulation of a synthetic effluent containing commercial dye Indigo Blue and the effluent from a textile factory. The quantified parameters were color, turbidity, pH, electrical conductivity, sludge generation, phenol removal, chemical oxygen demand (COD), and total organic carbon (TOC). The electrocoagulation treatment presented a good efficiency in removing the analyzed parameters, obtaining average removal in the synthetic effluent of 85 % of color and 100 % of phenol after 25 min of electrolysis. For the effluent from the textile factory, average reductions of 80 % of color, 91 % of turbidity, 100 % of phenol, 55 % of COD, and 73 % of TOC were measured after 60 min of electrolysis. The results obtained demonstrate the potential of using iron slag as an electrode in the electrocoagulation process in order to reuse industrial waste and reduce costs in the treatment and disposal of solid waste.

scholarly journals Application of electrochemical treatment for the removal of triazine dye using aluminium electrodes

2020 ◽  
Vol 69 (4) ◽  
pp. 345-354 ◽  
Author(s):  
Sakthisharmila Palanisamy ◽  
Palanisamy Nachimuthu ◽  
Mukesh Kumar Awasthi ◽  
Balasubramani Ravindran ◽  
Soon Woong Chang ◽  
...  
Keyword(s):  
Oxygen Demand ◽  
Electrical Energy ◽  
Reactive Dye ◽  
Product Formation ◽  
Electrochemical Treatment ◽  
Electrochemical Process ◽  
Spectral Studies ◽  
Textile Dye ◽  
Electrode Consumption ◽  
Electrocoagulation Process

Abstract Textile effluents contain triazine-substituted reactive dyes that cause health problems such as cancer, birth defects, and hormone damage. An electrochemical process was employed effectively to degrade azo reactive dye with the aim of reducing the production of carcinogenic chemicals during biodegradation. Textile dye C.I. Reactive Red 2 (RR2), a model pollutant that contains dichloro triazine ring, was subjected to the electrocoagulation process using aluminium (Al) electrodes. A maximum of 97% of colour and 72% of chemical oxygen demand (COD) removal efficiencies were achieved and 9.5 kWh/kg dye electrical energy and 0.8 kg Al/kg dye electrode consumption were observed. The dye removal mechanism was studied by analysing the results of UV-Vis spectra of RR2 and treated samples at various time intervals during electrocoagulation. Fourier transform infrared (FTIR) spectra and energy dispersive X-ray (EDX) spectral studies were used for analysing the electrocoagulated flocs. The results indicate that in this process the dye gets removed by adsorption and there is no significant carcinogenic by-product formation during the degradation of dye.

Evaluation of operational parameters from a microfiltration system for indigo blue dye recovery from textile dye effluent

2013 ◽  
Vol 52 (1-3) ◽  
pp. 257-266 ◽  
Author(s):  
Míriam Cristina Santos Amaral ◽  
Luzia Sergina França Neta ◽  
Mariana Souza ◽  
Naiara Cerqueira ◽  
Roberto Bentes de Carvalho
Keyword(s):  
Blue Dye ◽  
Textile Dye ◽  
Operational Parameters ◽  
Textile Dye Effluent ◽  
Indigo Blue

scholarly journals Adsorption study with NaOH chemically treated soybean hull for textile dye removal

2019 ◽  
Vol 10 (5) ◽  
pp. 161-168
Author(s):  
Cesar Vinicius Toniciolli Rigueto ◽  
Fabi Cristina Assunção Fonseca ◽  
Bárbara Belem Zanella ◽  
Marieli Rosseto ◽  
Jeferson Steffanello Piccin ◽  
...  
Keyword(s):  
Experimental Data ◽  
Textile Industry ◽  
Animal Feed ◽  
Adsorptive Capacity ◽  
Blue Dye ◽  
Maximum Adsorption Capacity ◽  
Textile Dye ◽  
Soybean Hull ◽  
Chemically Treated ◽  
Naoh Treatment

The activities of the textile industry generate effluents containing high chemical load, due to the presence of toxic dyes, causing water contamination. Adsorption is a promising technique for the removal of effluent dyes, however, studies are needed to look for alternative adsorbent materials, aiming at low cost and removal efficiency. The soybean hull (Glycine max) is an agroindustrial residue widely generated in Brazil, but its application is only for animal feed. The objective of this work was to evaluate the adsorption potential of chemically treated soybean hull with sodium hydroxide (NaOH) in the removal of 5G reactive blue dye. The biosorbent was subjected to NaOH treatment at different concentrations (0.01, 0.1 and 0.5 mol L-1), influence of temperature (30, 40 and 50 ºC), rotation speed (30, 60 and 90 rpm) and pH (1 to 11) was verified. The kinetics and equilibrium isotherms were performed using the best conditions obtained in the preliminary tests, and the experimental data adjusted to the theoretical models previously described in the literature. The studied variables indicated that the highest removal (about 88%) occurred under the conditions of 0.01 mol L-1 NaOH concentration, 50 ºC, 90 rpm and pH 2. In the kinetics, it was observed that the equilibrium was achieved in about 240 min, with the best fit of the pseudo-second order model. In isotherms, the Langmuir model better predicts experimental data, predicting a maximum adsorption capacity of 16.46 mg g-1. The soybean hull was effective in removing dyes in aqueous solution, however, NaOH treatment showed no relevant improvement in adsorptive capacity.

scholarly journals Adsorption and Photocatalytic Mineralization of Bromophenol Blue Dye with TiO2 Modified with Clinoptilolite/Activated Carbon

Catalysts ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 7
Author(s):  
Emmanuel Kweinor Tetteh ◽  
Sudesh Rathilal
Keyword(s):  
Activated Carbon ◽  
Photocatalytic Degradation ◽  
Oxygen Demand ◽  
Freundlich Isotherm ◽  
Reaction Rate Constant ◽  
Coefficient Of Determination ◽  
Bromophenol Blue ◽  
Blue Dye ◽  
Order Kinetic ◽  
Co Precipitation

This study presents a hybridized photocatalyst with adsorbate as a promising nanocomposite for photoremediation of wastewater. Photocatalytic degradation of bromophenol blue (BPB) in aqueous solution under UV-irradiation of wavelength 400 nm was carried out with TiO2 doped with activated carbon (A) and clinoptilolite (Z) via the co-precipitation technique. The physiochemical properties of the nanocomposite (A–TiO2 and Z–TiO2) and TiO2 were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier-transform infrared (FTIR) spectroscopy. Results of the nanocomposite (A–TiO2 and Z–TiO2) efficiency was compared to that with the TiO2, which demonstrated their adsorption and synergistic effect for the removal of chemical oxygen demand (COD) and color from the wastewater. At an optimal load of 4 g, the photocatalytic degradation activity (Z–TiO2 > A–TiO2 > TiO2) was found favorably by the second-order kinetic model. Consequently, the Langmuir adsorption isotherms favored the nanocomposites (Z–TiO2 > A–TiO2), whereas that of the TiO2 fitted very well on the Freundlich isotherm approach. Z–TiO2 evidently exhibited a high photocatalytic efficacy of decomposition over 80% of BPB (COD) at reaction rate constant (k) and coefficient of determination (R2) values of 5.63 × 10−4 min−1 and 0.989, respectively.

The effect of the textile industry dye bath additive EDTMPA on colour removal characteristics by ozone oxidation

2007 ◽  
Vol 55 (10) ◽  
pp. 145-153 ◽  
Author(s):  
T. Ölmez ◽  
I. Kabdaşlı ◽  
O. Tünay
Keyword(s):  
Organic Matter ◽  
Textile Industry ◽  
Reaction Rates ◽  
Textile Dye ◽  
Pseudo First Order Reaction ◽  
Ozone Oxidation ◽  
Reactive Dyeing ◽  
First Order ◽  
Organic Matter Oxidation ◽  
Pseudo First Order

In this study, the effects of the phosphonic acid based sequestering agent EDTMPA used in the textile dye baths on colour and organic matter removal by ozone oxidation was experimentally investigated. Procion Navy HEXL dyestuff that has been commonly used for the reactive dyeing of cellulose fibers was selected as the model component. The organic matter oxidation by ozone was determined to obey the pseudo-first order kinetics as they are treated singly or in combination. COD removal rates obtained from pseudo-first order reaction kinetics showed that oxidation of Navy HEXL alone (0.0947 L/min) was faster than that of EDTMPA (0.0171 L/min) and EDTMPA with dye (0.0155 L/min) at pH 3.0. It was also found that reaction rates of single EDTMPA removal and EDTMPA and dye mixture removal increased as the reaction pH was increased from 3.0 to 10.5.

Enhanced Degradation of the Industrial Textile Dye Disperse Red BG by Electrochemical Process with Different Anodes

2017 ◽  
Vol 164 (13) ◽  
pp. E440-E447 ◽  
Author(s):  
Christian Candia-Onfray ◽  
Abdoulaye Thiam ◽  
Claudio Salazar ◽  
Carlos A. Martinez-Huitle ◽  
Ricardo Salazar
Keyword(s):  
Electrochemical Process ◽  
Textile Dye ◽  
Enhanced Degradation

Phenol Removal from Contaminated Wastewater Using Activated Carbon/Zeolite Composite Coated with Titanium Dioxide

2016 ◽  
Vol 690 ◽  
pp. 103-108
Author(s):  
Khemmakorn Gomonsirisuk ◽  
Thanakorn Wasanapiarnpong ◽  
Charusporn Mongkolkachit
Keyword(s):  
Titanium Dioxide ◽  
Activated Carbon ◽  
High Efficiency ◽  
Adsorption Property ◽  
Phenol Concentration ◽  
Study Phase ◽  
Phenol Removal ◽  
High Porosity ◽  
Good Efficiency ◽  
Composite Substrate

Phenol and phenolic compounds in wastewater from various industries were toxic to water livings and human even in ppm concentration. A number of photocatalysts and adsorbents were applied for the low cost and good efficiency wastewater management to reduce phenol concentration in water. In this work titanium dioxide, one of high efficiency photocatalysts which is widely used in water treatement, was coated on the fabricated adsorbent composite substrate. The composite substrate composed of activated carbon and NaA zeolite presents high phenol adsorption because of high porosity and good ion exchange properties resulting in good adsorption property. Accordingly, the absorption could promote the photocatalytic activity of TiO2 catalyst. As the specimens were easily disposed after water treatment process, therefore, it was a good choice for lower energy consumption. The composite substrate was easily fabricated by simple extrusion and fired under non oxidation atmosphere at 650°C for 3 hours. Then polyurethane foam was inserted into the composite substrate to make it be able to float and be swirled by wind near water surface to get more UV excitation than deeper water. Phenol concentration was investigated by the UV absorbance at 270 nm using UV-Vis spectrophotometer. The XRD and SEM were used to study phase crystal structure and morphology of the composite.

Removal of Methylene Blue Dye by Using Eggshell Powder

2013 ◽  
Vol 65 (1) ◽  
Author(s):  
Norzita Ngadi ◽  
Chin Chiek Ee ◽  
Nor Aida Yusoff
Keyword(s):  
Methylene Blue ◽  
Textile Industry ◽  
Low Cost ◽  
Kinetic Studies ◽  
Operating Conditions ◽  
Blue Dye ◽  
Dye Wastewater ◽  
Order Model ◽  
Aquatic Life ◽  
Pseudo Second Order

Dyes contain carcinogenic materials which can cause serious hazards to aquatic life and the users of water. Textile industry is the main source of dye wastewater which results in environmental pollution. Many studies have been conducted to investigate the use of low cost adsorbent as an alternative technique for the adsorption of dye. The objective of this study is to determine the potential of eggshell powder as an adsorbent for methylene blue removal and find out the best operating conditions for the color adsorption at laboratory scale. The adsorption of cationic methylene blue from aqueous solution onto the eggshell powder was carried out by varying the operating parameters which were contact time, pH, dosage of eggshell powder and temperature in order to study their effect in adsorption capacity of eggshell powder. The results obtained showed that the best operating condition for removal of methylene blue was at pH 10 (78.98 %) and temperature 50°C (47.37 %) by using 2 g of eggshell powder (57.03 %) with 30 minutes equilibrium time (41.36 %). The kinetic studies indicated that pseudo-second-order model best described the adsorption process.

scholarly journals Luffa cylindrica Immobilized with Aspergillus terreus QMS-1: an Efficient and Cost-Effective Strategy for the Removal of Congo Red using Stirred Tank Reactor

2020 ◽  
Vol 69 (2) ◽  
pp. 193-203
Author(s):  
QANDEEL LARAIB ◽  
MARYAM SHAFIQUE ◽  
NUSRAT JABEEN ◽  
SEHAR AFSHAN NAZ ◽  
HAFIZ RUB NAWAZ ◽  
...  
Keyword(s):  
Congo Red ◽  
Textile Industry ◽  
Aspergillus Terreus ◽  
Quantitative Estimation ◽  
Oxygen Demand ◽  
Cost Effective ◽  
Stirred Tank ◽  
Luffa Cylindrica ◽  
Stirred Tank Bioreactor ◽  
Efficient System

Microbial populations within the rhizosphere have been considered as prosperous repositories with respect to bioremediation aptitude. Among various environmental contaminants, effluent from textile industries holds a huge amount of noxious colored materials having high chemical oxygen demand concentrations causing ecological disturbances. The study was aimed to explore the promising mycobiome of rhizospheric soil for the degradation of azo dyes to develop an efficient system for the exclusion of toxic recalcitrants. An effluent sample from the textile industry and soil samples from the rhizospheric region of Musa acuminata and Azadirachta indica were screened for indigenous fungi to decolorize Congo red, a carcinogenic diazo dye, particularly known for its health hazards to the community. To develop a bio-treatment process, Aspergillus terreus QMS-1 was immobilized on pieces of Luffa cylindrica and exploited in stirred tank bioreactor under aerobic and optimized environment. Quantitative estimation of Congo red decolorization was carried out using UV-Visible spectrophotometer. The effects of fungal immobilization and biosorption on the native structure of Luffa cylindrica were evaluated using a scanning electron microscope. A. terreus QMS-1 can remove (92%) of the dye at 100 ppm within 24 h in the presence of 1% glucose and 1% ammonium sulphate at pH 5.0. The operation of the bioreactor in a continuous flow for 12 h with 100 ppm of Congo red dye in simulated textile effluent resulted in 97% decolorization. The stirred tank bioreactor was found to be a dynamic, well maintained, no sludge producing approach for the treatment of textile effluents by A. terreus QMS-1 of the significant potential for decolorization of Congo red.

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