scholarly journals Effective decolorization of anthraquinone dye reactive blue 19 using immobilized Bacillus sp. JF4 isolated by resuscitation-promoting factor strategy

2020 ◽  
Vol 81 (6) ◽  
pp. 1159-1169 ◽  
Author(s):  
Jiafang Cai ◽  
Jiale Liu ◽  
Aodong Pan ◽  
Jinfu Liu ◽  
Yuyang Wang ◽  
...  
Keyword(s):  
Bacterial Species ◽  
Freundlich Isotherm ◽  
Textile Wastewater ◽  
Synthetic Dyes ◽  
Bacillus Sp ◽  
Anthraquinone Dye ◽  
Reactive Blue 19 ◽  
Equilibrium And Kinetics ◽  
Immobilized Beads ◽  
Textile Wastewater Treatment

Abstract Given the highly complex recalcitrant nature of synthetic dyes, biological treatment of textile wastewater using efficient bacterial species is still considered as an environmentally friendly manner. In this study, a reactive blue 19 (RB19)-degrading strain, Bacillus sp. JF4, which was isolated by resuscitation-promoting factor (Rpf) strategy, was immobilized into polyvinyl alcohol–calcium alginate–activated carbon beads (JF4-immobilized beads) for RB19 decolorization. Results suggest that the JF4-immobilized beads, which were capable of simultaneous adsorption and biodegradation, showed a high decolorization activity, while they exhibited better tolerability towards high RB19 concentrations. The JF4-immobilized beads could almost completely decolorize 100 mg/L RB19 within 10 d, while only 92.1% was decolorized by free bacteria within 12 d. Further investigation on the equilibrium and kinetics of the adsorption process suggests that the pseudo-second-order model best fit the adsorption kinetics data, and the Freundlich isotherm was the most suitable for the description of the equilibrium data. Notably, the repeated batch cycles indicated that complete decolorization of 100 mg/L RB19 by JF4-immobilized beads can be maintained for at least three cycles without much reduction in efficiency. These findings suggest that immobilizing Rpf-resuscitated strain into beads was an effective strategy for textile wastewater treatment.

scholarly journals Heterogeneous photocatalytic degradation of anthraquinone dye Reactive Blue 19: optimization, comparison between processes and identification of intermediate products

Water SA ◽  
2020 ◽  
Vol 46 (2 April) ◽  
Author(s):  
Miljana D Radović Vučić ◽  
Jelena Z Mitrović ◽  
Miloš M Kostić ◽  
Nena D Velinov ◽  
Slobodan M Najdanović ◽  
...  
Keyword(s):  
Surface Water ◽  
Textile Wastewater ◽  
Dye Decolorization ◽  
Heterogeneous Photocatalysis ◽  
Flat Band ◽  
Published Data ◽  
Anthraquinone Dye ◽  
Anthraquinone Dyes ◽  
Reactive Blue 19 ◽  
Low Toxicity

Treatment of textile wastewater using heterogeneous photocatalysis began in the the last decade and attracted the attention of researchers due to its versatile application. The variety of applications of TiO2 as a photocatalyst was due toits numerous positive properties, such as low operating temperature, biologically inert nature, low energy consumption, water insolubility, availability and photoactivity, low toxicity, high chemical stability, suitable flat band potential, narrow bandgap and the fact that it is environmentally benign. Heterogeneous UV-TiO2 photocatalysis is capable of removing organic pollutants from textile wastewater; this has been widely studied, with the technology also having been commercialized in many developing countries. Decolorization of anthraquinone dye Reactive Blue 19 (RB 19) by heterogeneous advanced oxidation processes TiO2/UV/H2O2, TiO2/UV/KBrO3 and TiO2/UV/(NH4)2S2O8 was studied under different conditions and in the presence of electron acceptors such as hydrogen peroxide (H2O2), potassium bromate (KBrO3) and ammonium persulphate ((NH4)2S2O8). Decolorization was very fast for all three processes, and complete dye decolorization was achieved in 10 min. The effect of various ions (Cl–, SO42– and HCO3–) on RB 19 decolorization was also studied. The optimal condition for the decolorization of the dye were determined to be: TiO2 concentration 1 g∙dm–3, electron acceptor concentration 30.0 mmol∙dm–3, dye concentration 50.0 mg∙dm–3, UV intensity 1 950 μW∙cm–2, at temperature 25 ± 0.5°C. In addition, experiments were performed and compared in three different matrices. In the surface water and dyebath effluent water, the removal efficiency for RB 19 was lower than that achieved in the deionized water because of the interference of complex constituents in the surface water and effluent. LC-MS analysis was carried out and the detected intermediates were compared with the previously published data for anthraquinone dyes.

scholarly journals Sorption of Acid Orange 3 From Aqueous Solution Using Eggshell

2020 ◽  
Vol 7 (2) ◽  
pp. 72-77
Author(s):  
Mohammad Hossien Saghi ◽  
Marziyeh Mohamadi ◽  
Sakineh Rouki ◽  
Hamze Salehzadeh ◽  
Shahram Sadeghi ◽  
...  
Keyword(s):  
Freundlich Isotherm ◽  
Textile Wastewater ◽  
Process Efficiency ◽  
Synthetic Wastewater ◽  
Alkaline Ph ◽  
Adsorption Efficiency ◽  
Acid Orange ◽  
Textile Industries ◽  
Textile Wastewater Treatment ◽  
Adsorbent Dose

Dyes are used extensively in textile industries. The wastewater of these industries contains high amounts of pollutants which can be toxic, carcinogenic, and mutagenic and needs to be treated before being discharged into the environment. The aim of this study was to evaluate the application of eggshell as a sorbent for the removal of Acid Orange 3 from synthetic wastewater. This study is applied experimental research which was performed on a laboratory scale. Eggshell as a sorbent was prepared at laboratory temperature and pulverized by standard ASTM sieves in two sizes (50 and 140). The concentration of dye in the synthetic wastewater was 25 mg/L. In this study, increasing adsorbent dose from 2 to 5 g/100 mL led to an increase in the adsorption efficiency from 36.6% to 55.36% and by decreasing the size of eggshell particles from 50 to 140 mesh, the adsorption efficiency increased. The maximum adsorption took place in the first 90 minutes of the reaction. By increasing pH from 5 to 9, the process efficiency increased from 78 to 82%; however, at pH higher than 9, the adsorption efficiency decreased. Additionally, the adsorption characteristics of this pollutant on eggshell fitted Freundlich isotherm (R2 >0.989). Due to the characteristics of textile wastewater such as alkaline pH, eggshells can be used as a natural adsorbent in textile wastewater treatment.

Textile wastewater in Tlemcen (Western Algeria): Impact, treatment by combined process

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Water Resources ◽  
Water Reuse ◽  
Freundlich Isotherm ◽  
Textile Wastewater ◽  
Water Shortage ◽  
Isotherm Models ◽  
Combined Process ◽  
Climate Conditions ◽  
Treated Effluent ◽  
Textile Wastewater Treatment

Algerian water resources are scarce, and unequally distributed. The region is facing severe water shortage problems due to climate conditions, uneven precipitations, and the long periods of drought. Moreover, the demand for water from the urban population, industry, and especially agriculture is rapidly increasing. Water management represents an economic and ecological challenge to cope with this demand, conserve the water resources and reduce the environmental pollution. The present paper reviews the textile wastewater treatment and feasibility of reuse. The treatment was performed using a combined process; adsorption on bentonite (B) followed by electroflotation (EF). The effects of B concentration, pH, contact time and current density, were investigated under optimal conditions for maximal dye elimination. Water reuse activity, the potentials, risks and issued associated with reclaimed water reuse are also reviewed. The results were well fitted by both Langmuir and Freundlich isotherm models and show that the effluent treated by this combined method contained essentially no turbidity, color or COD 99, 01%, 99, 49% and 99, 8% are the removal rates obtained, respectively. The treated effluent quality satisfied the requirement of water discharges standards and integration of other factors is needed to reuse this water.

scholarly journals HETEROGENEOUS ELECTRO FENTON PROCESS FOR TEXTILE WASTEWATER TREATMENT: APPLICATION OF Fe3O4-Mn3O4 AS A CATALYST

2018 ◽  
Vol 55 (6A) ◽  
pp. 193-199
Author(s):  
Nguyen Duc Dat Duc
Keyword(s):  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Current Density ◽  
Operating Cost ◽  
Textile Wastewater ◽  
Synthetic Dyes ◽  
Fenton Process ◽  
Long Time ◽  
Catalyst Dosage ◽  
Textile Wastewater Treatment

To produce quality textile products, many stable synthetic dyes are invented. However, textile wastewater discharged into the environment contains a large amount of dyes which are bio-recalcitrants and stable to heat and solar radiation. These toxic contaminants impact negatively the environment for a long time and poison plants, animals, and human. In this study, Heterogeneous Electro Fenton  process with Fe3O4-Mn3O4 as a catalyst was used for textile wastewater treatment. Graphite electrodes were chosen for their stability and good conductivity. Three operating factors greatly affected the removal efficiency are current density, pH and catalyst dosage. Response surface methodology was applied to find empirical mathematical models for these factors, then find an accordant operating condition for treatment which provides high removal efficiency and low operating cost. Investigated ranges scaled in previous studies were: current density (10 – 20 mA/cm2), pH (3 – 5), and catalyst dosage (0.5 – 1.5 g/l). At current density of 17.03 mA/cm2, pH of 3.77, catalyst dosage of 1.17 g/l, the treatment reached its optimum condition, COD and Color removal efficiencies were 93.3 % and 99.2 %, respectively, where COD and Color values in the effluent are 56 mg/l and 16 Pt-Co. 

scholarly journals HETEROGENEOUS ELECTRO FENTON PROCESS FOR TEXTILE WASTEWATER TREATMENT: APPLICATION OF Fe3O4-Mn3O4 AS A CATALYST

2018 ◽  
Vol 56 (2C) ◽  
pp. 193-199
Author(s):  
Nguyen The Phong
Keyword(s):  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Current Density ◽  
Operating Cost ◽  
Textile Wastewater ◽  
Synthetic Dyes ◽  
Fenton Process ◽  
Long Time ◽  
Catalyst Dosage ◽  
Textile Wastewater Treatment

To produce quality textile products, many stable synthetic dyes are invented. However, textile wastewater discharged into the environment contains a large amount of dyes which are bio-recalcitrants and stable to heat and solar radiation. These toxic contaminants impact negatively the environment for a long time and poison plants, animals, and human. In this study, Heterogeneous Electro Fenton  process with Fe3O4-Mn3O4 as a catalyst was used for textile wastewater treatment. Graphite electrodes were chosen for their stability and good conductivity. Three operating factors greatly affected the removal efficiency are current density, pH and catalyst dosage. Response surface methodology was applied to find empirical mathematical models for these factors, then find an accordant operating condition for treatment which provides high removal efficiency and low operating cost. Investigated ranges scaled in previous studies were: current density (10 – 20 mA/cm2), pH (3 – 5), and catalyst dosage (0.5 – 1.5 g/l). At current density of 17.03 mA/cm2, pH of 3.77, catalyst dosage of 1.17 g/l, the treatment reached its optimum condition, COD and Color removal efficiencies were 93.3 % and 99.2 %, respectively, where COD and Color values in the effluent are 56 mg/l and 16 Pt-Co. 

scholarly journals Heterogeneous photocatalytic degradation of anthraquinone dye Reactive Blue 19: optimization, comparison between processes and identification of intermediate products

Water SA ◽  
2020 ◽  
Vol 46 (2 April) ◽  
Author(s):  
Miljana D Radović Vučić ◽  
Jelena Z Mitrović ◽  
Miloš M Kostić ◽  
Nena D Velinov ◽  
Slobodan M Najdanović ◽  
...  
Keyword(s):  
Surface Water ◽  
Textile Wastewater ◽  
Dye Decolorization ◽  
Heterogeneous Photocatalysis ◽  
Flat Band ◽  
Published Data ◽  
Anthraquinone Dye ◽  
Anthraquinone Dyes ◽  
Reactive Blue 19 ◽  
Low Toxicity

Treatment of textile wastewater using heterogeneous photocatalysis began in the the last decade and attracted the attention of researchers due to its versatile application. The variety of applications of TiO2 as a photocatalyst was due toits numerous positive properties, such as low operating temperature, biologically inert nature, low energy consumption, water insolubility, availability and photoactivity, low toxicity, high chemical stability, suitable flat band potential, narrow bandgap and the fact that it is environmentally benign. Heterogeneous UV-TiO2 photocatalysis is capable of removing organic pollutants from textile wastewater; this has been widely studied, with the technology also having been commercialized in many developing countries. Decolorization of anthraquinone dye Reactive Blue 19 (RB 19) by heterogeneous advanced oxidation processes TiO2/UV/H2O2, TiO2/UV/KBrO3 and TiO2/UV/(NH4)2S2O8 was studied under different conditions and in the presence of electron acceptors such as hydrogen peroxide (H2O2), potassium bromate (KBrO3) and ammonium persulphate ((NH4)2S2O8). Decolorization was very fast for all three processes, and complete dye decolorization was achieved in 10 min. The effect of various ions (Cl–, SO42– and HCO3–) on RB 19 decolorization was also studied. The optimal condition for the decolorization of the dye were determined to be: TiO2 concentration 1 g∙dm–3, electron acceptor concentration 30.0 mmol∙dm–3, dye concentration 50.0 mg∙dm–3, UV intensity 1 950 μW∙cm–2, at temperature 25 ± 0.5°C. In addition, experiments were performed and compared in three different matrices. In the surface water and dyebath effluent water, the removal efficiency for RB 19 was lower than that achieved in the deionized water because of the interference of complex constituents in the surface water and effluent. LC-MS analysis was carried out and the detected intermediates were compared with the previously published data for anthraquinone dyes.

An efficient biotreatment process for polyvinyl alcohol containing textile wastewater

2013 ◽  
Vol 8 (3-4) ◽  
pp. 469-478 ◽  
Author(s):  
Sandip S. Magdum ◽  
Gauri P. Minde ◽  
Upendra S. Adhyapak ◽  
V. Kalyanraman
Keyword(s):  
Polyvinyl Alcohol ◽  
Process Optimization ◽  
Textile Wastewater ◽  
Cost Effective ◽  
Chemical Oxidation ◽  
High Rate ◽  
Microbial Consortia ◽  
Environment Friendly ◽  
Candida Sp ◽  
Textile Wastewater Treatment

The aim of this work was to optimize the biodegradation of polyvinyl alcohol (PVA) containing actual textile wastewater for a sustainable treatment solution. The isolated microbial consortia of effective PVA degrader namely Candida Sp. and Pseudomonas Sp., which were responsible for symbiotic degradation of chemical oxidation demand (COD) and PVA from desizing wastewater. In the process optimization, the maximum aeration was essential to achieve a high degradation rate, where as stirring enhances further degradation and foam control. Batch experiments concluded with the need of 16 lpm/l and 150 rpm of air and stirring speed respectively for high rate of COD and PVA degradation. Optimized process leads to 2 days of hydraulic retention time (HRT) with 85–90% PVA degradation. Continuous study also confirmed above treatment process optimization with 85.02% of COD and 90.3% of PVA degradation of effluent with 2 days HRT. This study gives environment friendly and cost effective solution for PVA containing textile wastewater treatment.

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