scholarly journals KINETIC STUDY OF THE EFFECT OF METHYLENE BLUE ON THE DECOLORIZATION OF OTHER DYES BY FENTON PROCESSES

2019 ◽  
Vol 16 (32) ◽  
pp. 885-893
Author(s):  
L. T. A. COSTA ◽  
A. AGUIAR
Keyword(s):  
Methylene Blue ◽  
Textile Industry ◽  
Antioxidant Properties ◽  
Blue Dye ◽  
Phenol Red ◽  
Oxidative Processes ◽  
Catalyzed Reactions ◽  
Parameter Values ◽  
Best Fit ◽  
Safranin T

The textile industry can cause serious environmental impacts due to the wastewater generated in its operations involving dyes, many of which have carcinogenic and mutagenic properties. The advanced oxidative processes, especially those based on the Fenton reaction (Fe2+ + H2O2 → Fe3+ + HO- + HO●), have been highlighted as an alternative for the treatment of textile effluents. These processes are based on the generation and action of free radicals, such as the radical HO●, for the degradation of organic pollutants. As these effluents can present more than one dye, the present work evaluated the influence of Methylene Blue dye in the decolorization of other dyes by Fenton processes (Fe2+/H2O2, Fe3+/H2O2). The decolorization tests were carried out over 60 min and monitored by spectrophotometry. With basis on the decolorization data, kinetic models (zero-, first-, second-orders, BMG) were analyzed to verify if the Methylene Blue has pro- or antioxidant properties. It was found that Methylene Blue promoted an increase in the decolorization of Phenol Red and Safranin T, little influence on Methyl Orange, while the decolorization of Cromotrope 2R was diminished. In general, the kinetic model that best fit the experimental data was the 2ª order. The BMG model fitted well to Fe2+-catalyzed reactions, whereas those containing initially Fe3+ the zero- and 1st-order models also showed good adjustments. Except for Cromotrope 2R, increases in kinetic parameter values were observed due to the addition of AM mediator dye. These results demonstrate that a dye can enhance, or even decrease, the degradation of other dyes by Fenton-based processes.

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.

Synthesis of Adsorbent from Bagasse for Methylene Blue Adsorption

2021 ◽  
Vol 7 (2) ◽  
pp. 188-195
Author(s):  
Nurhasni Nurhasni ◽  
Sariana Harahap ◽  
Ahmad Fathoni ◽  
Hendrawati Hendrawati
Keyword(s):  
Methylene Blue ◽  
Textile Industry ◽  
Contact Time ◽  
Ph Effect ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Batch Method ◽  
Homogeneous Surface ◽  
Dyeing Process ◽  
Ft Ir

The ability of bagasse adsorbents to adsorb methylene blue without activation using 0.5 M H2SO4 solution was examined. Methylene blue is widely used in the textile industry because it produces bright colors, and the dyeing process is fast and easy. This research aims to determine the optimum adsorption conditions, namely the variations in contact time, dye concentration, adsorbent mass, and pH effect on methylene blue, which were carried out using the batch method. Furthermore, the adsorbents were characterized by FT-IR and SEM. The optimum state of the bagasse adsorbent to adsorb methylene blue dye has a mass of 0.5 grams, a contact time of 30 minutes, a concentration of 50 ppm, and a pH of 5. The character of the adsorbent after activation with H2SO4 was better than without activation. The highest adsorption efficiency of methylene blue dye in the batch method was 99.67%. The FTIR spectrum of the bagasse adsorbent showed OH, C-H, C=O, C=C, and C-O functional groups. The adsorption isotherm model for methylene blue dye follows the Langmuir isotherm since the graph obtained is linear with the correlation coefficient (R2) = 1, where the adsorbent has a homogeneous surface.

scholarly journals Adsorption of methylene blue dye by different methods of obtaining shrimp residue chitin

2021 ◽  
pp. 1-10
Author(s):  
Iliane Muller Otto ◽  
Luiza Beatriz Gamboa Araújo Morselli ◽  
Dienifer Aline Braun Bunde ◽  
Simone Pieniz ◽  
Maurízio Silveira Quadro ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Textile Industry ◽  
Technological Development ◽  
Low Cost ◽  
Effluent Treatment ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Solubility In Water ◽  
Toxic Potential ◽  
Socioeconomic Benefits

The textile industry, very important for the world economy, generates an effluent containing dyes, and which, when discarded in water bodies without proper treatment, can cause impacts to human health and the environment. One of these widely used dyes is methylene blue, whose characteristics are high solubility in water and its toxic potential, and which effects range from eye irritations, nausea, vomiting and even mental confusion. Among the potential adsorbents of this dye is chitin, which is a biopolymer extracted from the shrimp exoskeleton. Aiming at the development of a low-cost adsorbent material with potential use in the textile effluent treatment industry, the ability to remove methylene blue dye by shrimp residue chitin, obtained by eleven different methodologies, was verified. The three most efficient treatments reached approximately 75% of dye removal, proving the high adsorption power of shrimp residue. In addition to providing technological development of materials, the research brings socioeconomic benefits to the fishermen’s colony with the use of shrimp residue for the adsorption of other waste from the textile industry, contributing to the sustainability of both activities and reducing the environmental impact.

scholarly journals Bioremediation of methylene blue dye using Bacillus subtilis MTCC 441

2017 ◽  
Vol 75 (7) ◽  
pp. 1572-1583 ◽  
Author(s):  
Ganta Upendar ◽  
Susmita Dutta ◽  
Pinaki Bhattacharya ◽  
Abhishek Dutta
Keyword(s):  
Methylene Blue ◽  
Bacillus Subtilis ◽  
Textile Industry ◽  
Immobilized Cells ◽  
Fixed Bed ◽  
Inoculum Size ◽  
Blue Dye ◽  
Influent Concentration ◽  
Operating Variables ◽  
Industry Effluent

Methylene blue (MB) commonly found in the textile industry effluent has been chosen as a model dye to investigate bioremediation using Bacillus subtilis MTCC 441. Both free cells and calcium alginate immobilized cells have been used to remove MB from the effluent. The operating variables of initial concentration of dye (20–60 mg/L), inoculum size (4–8%) and temperature (25–35 °C) have been varied judiciously during the kinetic study in a batch contactor. A maximum removal of 91.68% is obtained when 20 mg/L MB solution was inoculated with 8% inoculum and cultured for 6 h at 30 °C. Continuous removal of MB has been studied in a fixed bed contactor using immobilized cells as packing materials. Influent concentration (10–30 mg/L) was varied and breakthrough parameters have been determined. With increase in influent concentration from 10 mg/L to 30 mg/L, percentage removal of dye decreases from 72.44% to 49.62%.

scholarly journals Use of activated carbon from Sapindus for the adsorption of methylene blue

2018 ◽  
Vol 19 (1) ◽  
pp. 112-122 ◽  
Author(s):  
Taous Hamad ◽  
◽  
Zoubir Benmaamar ◽  
Mohamad Nedjioui ◽  
Ahmed Boucherit ◽  
...  
Keyword(s):  
Experimental Data ◽  
Methylene Blue ◽  
Activated Carbon ◽  
Adsorption Kinetics ◽  
Low Cost ◽  
Distribution Functions ◽  
Blue Dye ◽  
Experimental Conditions ◽  
Effects Of Ph ◽  
Best Fit

Activated carbon was produced from Sapindusfruitresidue and wasused for the adsorption of methylene blue dye from simulated aqueous solution. Adsorption kinetics of methylene blue onto actived carbonwerestudied in a batch system. The effects of pH and contact time were examined. The goal of the present study was the determination of the optimal experimental conditions. The maximum adsorption of methylene blue occurredat pH 6.0(4.83 mg/g) and the lowest adsorption occurred at pH 2.0(4.35 mg/g).120 min was the time needed for apparent equilibrium.Adsorption modelling was determined by using theFreundlich and Langmuir isotherms.Data were interpreted based on R2and various error distribution functions. Adsorption isotherm was best described bynon linear Freundlichisotherm model. In order to determine the best-fit-adsorption kinetics, the experimental data were analyzed using pseudo-first-order, pseudo-second-order, pseudo-third-order, Esquivel, and Elovichmodels. The needed relative parameters were determined bylinear and non-linear regressive methods. The statistical functions were estimated to find the suitable method which fit the experimental data. Both methods were suitable to obtain the required parameters. The model that best fit the present equilibrium data was the linear Elovichmodel (type 1 and 2). The present work showed that activated carbon can be used as a low cost adsorbent for the methylene blue removal from aqueous solutions.

scholarly journals Shortleaf Spikesedge-Driven Silver Nanoparticles for The Reduction of Methylene Blue Dye

2021 ◽  
Author(s):  
NORAIN ISA ◽  
Mohamed Syazwan Osman ◽  
Haslinda Abdul Hamid ◽  
Nurdiana Samsulrizal ◽  
Vicinisvarri Inderan ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Silver Nanoparticles ◽  
Reaction Time ◽  
Textile Industry ◽  
Average Particle Size ◽  
Spherical Shape ◽  
Blue Dye ◽  
Average Particle ◽  
Order Kinetic ◽  
Batch Study

Abstract The textile industry is a heavy producer of wastewater, which may result in the discharge of toxic dyes into the environment. Methylene blue (MB) is an example of the most used dye in the textile industry. It is difficult to degrade MB under normal conditions due to its highly stable molecules. Therefore, a catalyst route is desired in MB reduction. The catalyst chosen in this work was silver nanoparticles (AgNPs) synthesised by a biological method utilising shortleaf spikesedge extract (SSE) as a reducing agent. The formations of SSE driven AgNPs were monitored using visual observation (colour), ultraviolet-visible spectroscopy (UV-vis), and transmission electron microscopy (TEM). The different process variables (concentration of AgNO3, concentration of SSE, reaction time, temperature and pH) upon synthesis of SSE driven AgNPs were evaluated based on the absorbance of surface plasmon resonance (SPR) band. The TEM image showed that SSE driven AgNPs are highly dispersed with a quasi-spherical shape and an average particle size of approximately 17.64 nm. For the catalytic study, the reduction of MB was evaluated using two systems. A detailed batch study of the removal efficiency (%RE) and kinetics was done at ambient temperature, various MB initial concentrations, and reaction time. The batch study for System 2 clearly showed that SSE driven AgNPs exhibited 100% reduction of MB at 30–100 mg/L initial concentration (sample coding of MB30, MB50, MB70 and MB100) between 1.5 and 5.0 min reaction time. The kinetic data best fitted a pseudo-first-order kinetic model with the highest reaction rate of 2.5715 min-1. The reduction of MB occurs via the electron relay effect. These findings demonstrate that the SSE driven AgNPs are a promising candidate with potential influence on coloured wastewater.

scholarly journals Effective Removal of Toxic Methylene Blue Dye from Textile Industry Wastewater using Graphene Oxide- Silica [GO-Si] Nano Composite Adsorbent

2020 ◽  
Vol 13 (1) ◽  
pp. 98-106
Author(s):  
Jayakaran Pachiyappan ◽  
Nirmala Gnanasundaram ◽  
Govindarajan Lakshmana Rao
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Textile Industry ◽  
Well Being ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Isotherm Study ◽  
Effective Removal ◽  
Pseudo Second Order ◽  
Industry Wastewater

Textile companies release wastewater containing lots of colors including Methylene Blue (MB) dye. Those colors are harrmful for human well being. Various procedures have been utilized to expel the color from industrial wastewater. Out of different methods used in practice, adsorption was observed to be exceptionally successful and effective. The reason behind the especiality is when nanocomposites are utilized as an adsorbent, as it has a better adsorption limit, selectivity, and solidness than nanoparticles. In this research, a peculiar synthesis of adsorbent Graphene Oxide Silica [GO-Si] is carried out and it is used to remove methylene blue dye from texile industry wastewater. Analysing the performance of MB dye removal from the waste water using this adsorbent seems to be more effective. Various studies have been carried out for successful analysis of the performance such as adsorption isotherm study, Freundlich and Langmuir analysis. In addition the adsorption process was well explained by a pseudo-second-order kinetics models.

scholarly journals Application of Spent Li-Ion Batteries Cathode in Methylene Blue Dye Discoloration

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Eric M. Garcia ◽  
Hosane A. Taroco ◽  
Ana Paula C. Madeira ◽  
Amauri G. Souza ◽  
Rafael R. A. Silva ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Textile Industry ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Li Ion Batteries ◽  
Li Ion Battery ◽  
Mechanism Study ◽  
Promising Alternative ◽  
Blue Discoloration ◽  
Li Ion

This paper aims to present the mechanism study of methylene blue (MB) discoloration using spent Li-ion battery cathode tape and hydrogen peroxide. The recycled cathode used in this work is composed of 72% of LiCoO2, 18% of carbon, and 10% of Al. The value found for surface area is 8.9 m2/g and the ZCP value occurs in pH = 2.95. Different from what is proposed in the literature, the most likely mechanism of methylene blue discoloration is the oxidation/delitiation of LiCoO2 and the reduction of H2O2 forming OH∙. Thus, in this paper, an important and promising alternative for discoloration of textile industry dyes using spent Li-ion battery cathode is presented.

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