scholarly journals Acid Blue 25 Removal by using Fe2+ Activated Persulfate

2020 ◽  
Author(s):  
Zeinab Ghorbani
Keyword(s):  
Textile Industry ◽  
Dye Removal ◽  
Aqueous Media ◽  
Industrial Effluents ◽  
Sodium Persulfate ◽  
Optimal Conditions ◽  
Initial Concentration ◽  
The One ◽  
Acid Blue ◽  
Activated Persulfate

Dyes are one of the most important contaminants in the textile industry wastewater, which are often carcinogenic, and biodegradable. So their removal from the effluent is environmentally important. This study aimed to investigate the efficiency of sodium persulfate in removing dye from aqueous media. In order to optimize each parameter, the one-factor-at-a-time method was used. In this experimental study, the effect of three main parameters including pH, sodium persulfate concentration, and iron (II) concentration on dye removal from aqueous solution was investigated. According to the results obtained from the experiments, the optimal removal efficiency of 92% was obtained in 60 minutes and under optimal conditions of pH=3, the initial concentration of sodium persulfate=500 mg / L, and the initial concentration of iron (II) sulfate=100 mg / L. According to the results, the use of sodium persulfate salt activated with Fe2+ can be an efficient process for dye removal from industrial effluents.

scholarly journals Acid Blue 25 Removal by using Electro-Persulfate Process

2020 ◽  
Author(s):  
Zeinab Ghorbani
Keyword(s):  
Aqueous Solution ◽  
Removal Efficiency ◽  
Salt Concentration ◽  
Dye Removal ◽  
Industrial Effluents ◽  
Sodium Persulfate ◽  
Initial Concentration ◽  
Acid Blue 25 ◽  
Sulfate Process ◽  
Acid Blue

This study aimed to investigate the efficiency of the electro-persulfate process in removing acid blue 25 from aqueous solution. In order to optimize the parameters, the OFAT method was used, and the effect of three main parameters, including pH, sodium persulfate salt concentration, and current intensity was investigated. According to the results, the optimal removal efficiency of 94% in 60 minutes was obtained under conditions of pH=5, the initial concentration of sodium persulfate=250 mg / L, and the current=500 mA. According to the results of this study, the electro-persulfate process sulfate process can be an efficient process for dye removal from industrial effluents.

scholarly journals Enhancement of the electro-activated persulfate process in dye removal using graphene oxide nanoparticle

2021 ◽  
Author(s):  
Bita Ayati ◽  
Zeinab Ghorbani
Keyword(s):  
Graphene Oxide ◽  
Current Density ◽  
Dye Removal ◽  
Electrochemical Process ◽  
Sodium Persulfate ◽  
Sulfate Concentration ◽  
Oxide Nanoparticle ◽  
Acid Blue ◽  
A Current ◽  
Activated Persulfate

Abstract This study aimed to improve the speed of the electrochemical process by graphene oxide nanoparticle as a current accelerator in Acid Blue 25 removal from aqueous solutions. To do so, the effect of different parameters including pH, dye concentration, sodium persulfate concentration, the ratio of sodium persulfate to iron (II) sulfate concentration, current density, and the distance between electrodes was investigated on dye removal. Under optimal conditions of pH = 5, dye concentration = 200 mg/L, sodium persulfate concentration = 500 mg/L, iron (II) sulfate concentration = 100 mg/L, current density = 16.67 mA/cm2, and electrode distance = 2 cm, 95% of dye was removed after 60 minutes in the electro-activated persulfate process; while the modified electro-activated persulfate process achieved 95% dye removal after only 40 minutes under the same conditions. This system was able to remove 90% of dye after 60 minutes at a higher concentration (300 mg/L). Also, the modified electro-activated persulfate process obtained the removal of 80% of COD, and 54% of TOC after 180 minutes in the mentioned conditions, for the dye concentration of 300 mg/L.

scholarly journals Performance Comparison of Fe2+ Activated Persulfate and Electro-Persulfate Process in Acid Blue 25 Removal from Aqueous Solution Operating: Conditions and Reaction Velocity

2020 ◽  
Author(s):  
Zeinab Ghorbani
Keyword(s):  
Aqueous Solution ◽  
Removal Efficiency ◽  
Ferrous Sulfate ◽  
Electrochemical Process ◽  
Sodium Persulfate ◽  
Sulfate Concentration ◽  
Reaction Velocity ◽  
Acid Blue 25 ◽  
Acid Blue ◽  
Activated Persulfate

The purpose of this study was to compare the performance of Fe2+ activated persulfate and electro-persulfate process in Acid Blue 25 removal from aqueous solution. For this reason, the effects of different parameters including pH, dye, sodium persulfate and ferrous sulfate concentrations were investigated. The removal efficiency of 92% at the time of 60 min was obtained at pH= 3, dye concentration= 50 mg/L, sodium persulfate concentration= 500 mg/L and Fe (II) sulfate concentration= 100 mg/L for Fe2+ activated persulfate system and the removal efficiency of 95% at pH= 5, dye concentration = 200 mg/L, sodium persulfate concentration = 500 mg/L and ferrous sulfate concentration = 100 mg/L for electro-persulfate system by means of graphite materials as the neutral electrodes. COD removal efficiency in Fe2+ activated persulfate and electro-persulfate in the mentioned conditions were 90% and 89% in 180 minutes, respectively. Moreover, the result of process kinetics showed that using electrochemical process improved the reaction velocity from 0.0016 to 0.0487 mg/L/min. The comparison between these two-process showed that using electrochemical process improved dye removal efficiency by 4 times.

Review on Potential Technologies for Decolourisation of Batik Wastewater

2015 ◽  
Vol 1113 ◽  
pp. 818-822
Author(s):  
M. Siti Zuraida ◽  
C.R. Nurhaslina ◽  
K.H. Ku Halim
Keyword(s):  
Natural Resource ◽  
Textile Industry ◽  
Industrial Wastewater ◽  
Large Scale ◽  
Dye Removal ◽  
Industrial Effluents ◽  
High Volume ◽  
Proper Treatment ◽  
Beneficial Uses ◽  
Size Type

Water is the most precious natural resource and it is impossible to live without it. However, the potential beneficial uses of water are lost due to changes in its composition as a result of human activity especially from industrial effluents. It is estimated about 22% of the total volume of industrial wastewater is produced by the textiles industry, one of the largest industrial producers of high volume wastewater primarily in the dyeing and finishing operations. This industry engenders a huge contribution to Malaysia’s economy development due to high demands locally and abroad. However, little awareness on the importance of clean practices in the production of Batik among Batik entrepreneurs has caused them to take improper actions by discharging the effluents without proper treatment. Currently, many technologies are available to solve the problems caused by textile industry. However, the best methods differ from plant to plant depending on size, type of waste and degree of treatment needed. This article reviews the available technologies and suggests an effective, cheaper alternative for dye removal and decolorisation applicable on large scale.

scholarly journals Application of the Natural Cellulosic Supports for the Treatment of the Industrial Effluents

2021 ◽  
Vol 44 (3) ◽  
pp. 48-55
Author(s):  
Andreea BONDAREV
Keyword(s):  
Aqueous Solutions ◽  
Crystal Violet ◽  
Dye Removal ◽  
Agricultural Waste ◽  
Beech Wood ◽  
Aqueous Media ◽  
Industrial Effluents ◽  
Chemically Modified ◽  
Wood Sawdust ◽  
Crystal Violet Dye

Wastewater treatment is one of the most important concerns of the research studies in the field of environmental protection. The current study relates to the removal of Crystal violet dye from aqueous solutions through adsorption experiments onto natural cellulosic supports. Various waste materials that have in their composition lignocellulose are adsorbent supports with low costs for the removal of heavy metal ions and dyes from aqueous solutions. The use of chemically modified sawdust to obtain an inexpensive adsorbent for removing the Crystal violet dye (CV) from synthetic aqueous solutions has been presented in this research paper. The influence of some important parameters such as: initial dye concentration, adsorbent dose, contact time and temperature on adsorption efficiency for this dye removal have been studied. The Freundlich, Langmuir and Temkin mathematical models have been used to evaluate the data of Crystal violet adsorption from aqueous media using wood sawdust. The research study shows that beech wood sawdust (Fagus sylvatica), as an agricultural waste which is readily available and relatively inexpensive has the potential to be an applicable alternative adsorbent for Crystal violet dye removal from industrial effluents.

scholarly journals Combination of photocatalytic degradation and adsorption in dye removal by TiO2-chitosan-glycerol beads under natural sunlight

2022 ◽  
Vol 964 (1) ◽  
pp. 012028
Author(s):  
Anh Thi-Kim Tran ◽  
Nhung Thi-Tuyet Hoang ◽  
Tien Thuy Hoang Nguyen
Keyword(s):  
Optimum Condition ◽  
Dye Removal ◽  
Irradiation Time ◽  
Photocatalytic Process ◽  
Orthogonal Array Design ◽  
Array Design ◽  
Initial Concentration ◽  
Natural Sunlight ◽  
Acid Blue ◽  
Level 2

Abstract The synthesis of TiO2-chitosan-glycerol (TiCsG) beads was prepared to determine the optimum condition for dye removal under natural sunlight. By using the orthogonal array design with five parameters (ratio of TiO2/Chitosan, initial concentration of dyes, pH of solution, irradiation time, dose of TiCsG) to analyze their interaction such as well as optimizing the photocatalytic process. The significant parameters influent in the removal of Acid Blue 193, MO, NWY dyes were irradiation time (p = 0.011) and the ratio of TiO2/chitosan (p = 0.025), while the initial concentration of dyes, pH of dye solution and dose of TiCsG were unimportant factors with p > 0.05. The optimum of factors based on the ratio of signal per noise to attain the highest dye removal ability of TiCsG was the percentage of TiO2/chitosan = 2 % w/w (level 2), initial concentration of dye at level 5 (10 mg/L of AB 193, 5 mg/L for MO and 100 mg/L for NWY), pH =4.5 (level 2), irradiation time =1.5 h (level 5) and dose of TiCsG =0.2 g/mL (level 4).

PREDICTIVE SIMULATION AND OPTIMIZATION ORIENTED MODELING FOR THE EXTRACTION OF METAL IONS FROM SOLUTIONS INTO A NOVEL BIS-SCHIFF BASE

2019 ◽  
pp. 1-8
Author(s):  
F. S. Nworie ◽  
S. O. Ngele ◽  
J. C. Onah
Keyword(s):  
Metal Ions ◽  
Metal Concentration ◽  
Acid Concentration ◽  
Aqueous Media ◽  
Industrial Effluents ◽  
Ligand Concentration ◽  
Simulation And Optimization ◽  
Chemometric Technique ◽  
Model Equations ◽  
Level Of Significance

Metal ions present in waste samples, industrial effluents, acid mines and other aqueous media constitute a serious challenge in different human activities. Solvent extraction a technique for preconcentration, separation and identification of trace amount of metal ions coupled with multivariate chemometric technique was used for the determination of Fe(II) and Cr(III) from solutions in the presence of bis(salicylidene)ethylenediamine (SALEN). The influence of main extraction variables affecting the extraction efficiency was simultaneously studied and regression model equations illustrating the relationship between variables predicted. The extraction parameters (time of extraction, acid concentration, ligand concentration, temperature and metal concentration) were optimized using experimental designs with the contributions of the various parameters to extraction of the metal ions bound to the complexone evaluated using SPSS19.0 software. The statistically determined simulated models for the parameters were R2 = 0.946, 0.727, 0.793, 0.53, 0.53, 1.000 and F- values of 70.400, 13. 285, 15.348, 4.646 and 2.569×105 respectively for time of extraction, acid concentration, ligand concentration, temperature and metal concentration for Cr (III). For Fe (II), R2 = 0.243, 0.371, 0.519, 0.446, 1.000 and F-values of 0.964, 2.953, 4.310, 3.216 and 2.516×105 for time of extraction, acid concentration, ligand concentration, temperature and metal concentration respectively. The level of significance of the models as predicted was both lower than 5% making it feasible, efficient, reproducible and accurate. This means that metal ions at the conditions stated could be removed from waste samples, industrial effluents, acid mines and other aqueous media with extension in industrial scale application.

scholarly journals Removal of Methylene Blue and Congo Red Using Adsorptive Membrane Impregnated with Dried Ulva fasciata and Sargassum dentifolium

Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 384
Author(s):  
Ahmed Labena ◽  
Ahmed E. Abdelhamid ◽  
Abeer S. Amin ◽  
Shimaa Husien ◽  
Liqaa Hamid ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Removal Efficiency ◽  
Congo Red ◽  
Dye Removal ◽  
Industrial Effluents ◽  
Composite Membranes ◽  
Acrylic Fiber ◽  
Ulva Fasciata ◽  
Ft Ir ◽  
Sorption Time

Biosorption is a bioremediation approach for the removal of harmful dyes from industrial effluents using biological materials. This study investigated Methylene blue (M. blue) and Congo red (C. red) biosorption from model aqueous solutions by two marine macro-algae, Ulva fasciata and Sargassum dentifolium, incorporated within acrylic fiber waste to form composite membranes, Acrylic fiber-U. fasciata (AF-U) and Acrylic fiber-S. dentifolium (AF-S), respectively. The adsorption process was designed to more easily achieve the 3R process, i.e., removal, recovery, and reuse. The process of optimization was implemented through one factor at a time (OFAT) experiments, followed by a factorial design experiment to achieve the highest dye removal efficiency. Furthermore, isotherm and kinetics studies were undertaken to determine the reaction nature. FT-IR and SEM analyses were performed to investigate the properties of the membrane. The AF-U membrane showed a significant dye removal efficiency, of 88.9% for 100 ppm M. blue conc. and 79.6% for 50 ppm C. red conc. after 240 min sorption time. AF-S recorded a sorption capacity of 82.1% for 100 ppm M. blue conc. after 30 min sorption time and 85% for 100 ppm C. red conc. after 240 min contact time. The membranes were successfully applied in the 3Rs process, in which it was found that the membranes could be used for five cycles of the removal process with stable efficiency.

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