scholarly journals Study on the decolourisation conditions of methylene blue by Irpex Lacteus

2021 ◽  
Vol 257 ◽  
pp. 03036
Author(s):  
Hongshi Bu ◽  
Huan Wang ◽  
Bo Zhang ◽  
Xin Dong ◽  
Jia Wang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Incubation Time ◽  
Nitrogen Sources ◽  
Blue Dye ◽  
Process Conditions ◽  
Dyeing Wastewater ◽  
Irpex Lacteus ◽  
Inoculum Level ◽  
Printing And Dyeing Wastewater ◽  
Liquid Fermentation

The fungus Irpex Lacteus is effective in decolourising methylene blue, a common dye in printing and dyeing wastewater, and it is of clear significance to investigate its optimal decolourisation process through liquid fermentation. The medium mixed with methylene blue dye was incubated with Irpex Lacteus in a constant temperature shaking flask liquid fermentation equipment, and single factors such as incubation time, temperature, shaking bed speed, dye concentration, pH, carbon and nitrogen sources were screened, and key factors were targeted orthogonal tests were carried out to optimise the best decolourisation process for Irpex Lacteus against methylene blue. The single-factor test revealed that carbon, nitrogen, pH and inoculum were the main factors influencing the decolourisation of methylene blue by Irpex Lacteus. The results of the orthogonal test showed that the decolourisation effect was best when the carbon source was sucrose, the nitrogen source was peptone, pH=3.5, the inoculum level was 7% and the incubation time was 10 days. Irpex Lacteus showed good decolourisation effect on methylene blue and the optimised process conditions provided a new direction for the treatment of printing and dyeing wastewater.

scholarly journals Optimization of Process Parameters for Enhanced Degradation of Methylene Blue by Trough Ultrasonic

2022 ◽  
Vol 2152 (1) ◽  
pp. 012027
Author(s):  
Yong-guang Bi ◽  
Yu-hong Zheng ◽  
Li Tang ◽  
Juan Guo ◽  
Shao-Qi Zhou
Keyword(s):  
Methylene Blue ◽  
Process Conditions ◽  
Ultrasonic Power ◽  
Test Results ◽  
Dyeing Wastewater ◽  
Optimal Process ◽  
Printing And Dyeing Wastewater ◽  
Optimization Of Process Parameters ◽  
Large Discharge ◽  
Enhanced Degradation

Abstract Due to the complex quality and the large discharge of printing and dyeing wastewater, it will pollute the environment and affect human health. Therefore, how to use efficient and inexpensive treatment methods to treat printing and dyeing wastewater has become an urgent problem to be solved. At present, most printing and dyeing wastewater contains methylene blue pollutants. Based on the previous research in this article, the process conditions for the enhanced degradation of methylene blue by trough ultrasound are optimized. Orthogonal test results show that the optimal process parameter for the degradation of methylene blue by trough ultrasonic is pH 12.70, and the initial With a concentration of 10.00mg/L and an ultrasonic power of 200W, under the above optimal process conditions, the degradation rate of methylene blue is 77.95%; Ultrasound improves the rapid degradation of methylene blue through mechanisms such as cavitation, thermal and mechanical effects. This process can be used for the industrial degradation of methylene blue. The application provides a research basis.

scholarly journals Preparation and the Catalytic Properties of Attapulgite / TiO2 Nanocomposites

2022 ◽  
Vol 2152 (1) ◽  
pp. 012006
Author(s):  
Jianping Shang ◽  
Tao Li ◽  
Xiaoping Qin ◽  
Bin Zhao ◽  
Xuefei Li
Keyword(s):  
Methylene Blue ◽  
Degradation Mechanism ◽  
Rapid Development ◽  
Pure Water ◽  
Oxidative Degradation ◽  
Blue Dye ◽  
Dyeing Wastewater ◽  
Printing And Dyeing Wastewater ◽  
Catalytic Activities ◽  
Textile Printing

Abstract With the rapid development of industry, the discharge of textile printing and dyeing wastewater will cause serious pollution to other pure water bodies. It is imperative to deal with textile printing and dyeing wastewater. In this paper, with titanium tetrachloride as a precursor, attapulgite (ATP) / TiO2 nanocomposites were prepared by a neutralizing hydrolysis method and their catalytic activities were investigated by the oxidative degradation of methylene blue dye using ozone as oxidant. The test results showed that there were significant interactions between TiO2 and ATP support. The effects were also studied of ozone concentration, catalyst amount, reaction temperature, and initial concentration of methylene blue on the degradation rate of methylene blue catalyzed by the prepared attapulgite / TiO2 nanocomposites, and under the optimal conditions, the methylene blue could be degraded more than 90% in 30 minutes. Compared with that of pure ATP, the catalytic activities of ATP / TiO2 nanocomposites were enhenced remarkably. The degradation mechanism of methylene blue was also discussed.

scholarly journals Treatment of simulated printing and dyeing wastewater using ozone microbubble

2021 ◽  
Vol 261 ◽  
pp. 04005
Author(s):  
Emmanuel Nkudede ◽  
Husseini Sulemana ◽  
Bo Zhang ◽  
Kaida Zhu ◽  
Shan Hu ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Methylene Blue ◽  
Removal Efficiency ◽  
Human Life ◽  
Cod Removal ◽  
Dyeing Wastewater ◽  
Flow Rates ◽  
Printing And Dyeing Wastewater ◽  
Cod Removal Efficiency ◽  
Initial Ph

Owing to its widespread and persistent usage, methylene blue (MB) is an environmental substance, mostly found in the printing and dyeing industry that raises concerns in the environment recently by posing significant threat to human life and the ecosystem as a whole. Thus, there is the need to effectively manage and treat the wastewater from these industries before reaching to the available water sources. Ozonation treatment is very efficient in treating printing and dyeing wastewater (MB) and can be greatly improved by using micro-bubble technology. Microbubble dissolution is an effective way to improve the rate of ozone mass transfer. To discover these properties, a method was used to improve the mass transfer of ozone microbubbles, which was used to effectively treat simulated printing and dyeing wastewater. We investigated the effects of pH, water temperature, ozone flow, and other conditions on the dissolution and attenuation properties of ozone in methylene blue microbubble solutions. Treatment of simulated printing and dyeing wastewater (methylene blue) was investigated under various initial pH and ozone flow rates. A catalytic exhibition was performed towards the decolorization of methylene blue (MB) concentrations and the corresponding COD removal efficiency. Ozone depletion and pH levels played key roles in MB degradation. Under high pH level of 11.01, the rate of removal of COD was 93.5%. Ozone dosage also has direct effect on COD removal efficiency and decolorization. Higher ozone flow rates, 0.4 L/min and 0.5 L/min recorded more than 94% degradation of COD thus very effective and efficient. Also, ozone flow rates 0.3 L/min, 0.4 L/min and 0.5 L/min with initial pH, 7.03, 6.63 and 6.36 decreased to 3.43, 3.49 and 3.44 after reaction processes which clearly shows that with high ozone dosage, pH reduces considerably.

scholarly journals Production of activated carbon from sludge and herb residue of traditional Chinese medicine industry and its application for methylene blue removal

BioResources ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. 1333-1346 ◽  
Author(s):  
Zhenwei Yu ◽  
Qi Gao ◽  
Yue Zhang ◽  
Dandan Wang ◽  
Innocent Nyalala ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Chinese Medicine ◽  
Design Method ◽  
Orthogonal Experimental Design ◽  
Blue Dye ◽  
Process Conditions ◽  
Activation Time ◽  
Activation Temperature ◽  
Impregnation Ratio

Sludge-based activated carbon (SAC) was prepared with sewage sludge and Chinese medicine herbal residues (CMHR’s). An orthogonal experimental design method was used to determine the optimum preparation conditions. The effects of the impregnation ratio, activation temperature, activation time, and addition ratio of CMHR’s on the iodine value and Brunauer-Emmett-Teller surface area of activated carbon were studied. X-ray diffraction, Fourier-transform infrared spectrometer, and scanning electron microscopy were used to characterize the prepared SAC. The results showed that the optimal process conditions for preparing the SAC were as follows: an impregnation ratio of 1:4, an activation time of 30 min, an activation temperature of 700 °C, and an addition ratio of CMHR’s of 40%. The adsorption balance of the methylene blue dye was examined at room temperature. Adsorption isotherms were obtained by fitting the data using the Langmuir and Freundlich models, which showed that methylene blue adsorption was most suitable for the Langmuir equation. The results demonstrated that SAC prepared from SS and CMHR’s from a Chinese medicine factory could effectively expel dyes from wastewater.

Removal of methylene blue from aqueous solution using high performance calcium alginate/activated carbon membrane

2019 ◽  
Vol 32 (3) ◽  
pp. 307-321 ◽  
Author(s):  
Xiaoping Zhang ◽  
Yanhui Li ◽  
Meixiu Li ◽  
Heng Zheng ◽  
Qiuju Du ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Wastewater Treatment ◽  
Activated Carbon ◽  
Composite Membrane ◽  
Calcium Alginate ◽  
Dyeing Wastewater ◽  
Carbon Membrane ◽  
Content Type ◽  
Printing And Dyeing Wastewater ◽  
New Ideas

Purpose The purpose of this paper is to purify the wastewater in the garment industry. Design/methodology/approach The preparation of the calcium alginate (CA)/activated carbon (AC) composite membrane was achieved by vacuum freeze-drying and the cross-linking reaction between sodium alginate and CaCl2. Effective parameters in the methylene blue (MB) adsorption such as temperature, dose, contact time and pH were discussed. The adsorption properties of the composite membrane were investigated by isotherm, kinetics and thermodynamic analysis. The adsorption equilibrium data were described by the adsorption isotherm Langmuir model and the Freundlich model. The pseudo-first-order, pseudo-second-order and intra-particle diffusion equations were selected to evaluate the kinetics. The thermodynamic study described that the adsorption reaction was spontaneous and exothermic. Findings The AC/CA membrane is an efficient and powerful adsorbent to remove MB in printing and dyeing wastewater, and provides a new idea for the selection of adsorption materials for industrial printing and dyeing wastewater. Practical implications The composite membrane research on CA and AC can provide new ideas for the research of these kinds of materials. Social implications The paper contributes to its wider and convenientapplication in wastewater treatment. Originality/value Studies on the combination of CA and AC into adsorption membranes and for the removal of dyes from printing and dyeing wastewater have not been reported. A novel composite material is provided for treatment dyeing wastewater in garment production. The composite membrane research on CA and AC can provide new ideas for the research of these kinds of materials and contribute to its wider and convenient application in wastewater treatment.

scholarly journals Preparation of GO/PAM Continuous Adsorption Medium and its Dynamic Adsorption Properties for Methylene Blue

2020 ◽  
Vol 213 ◽  
pp. 01031
Author(s):  
Dagang Li ◽  
Zhiwen Wang
Keyword(s):  
Methylene Blue ◽  
Exchange Resin ◽  
Amorphous Region ◽  
Ion Exchange Resin ◽  
Dynamic Adsorption ◽  
Dyeing Wastewater ◽  
Continuous Adsorption ◽  
Printing And Dyeing Wastewater ◽  
Adsorption Capacities ◽  
One Step

A continuous and structured porous adsorbent named GO/PAM was synthesised by one-step copolymerization of graphene oxide (GO) and acrylamide (AM) in amorphous region initiated by redox agent consisting of hydrogen peroxide (H2O2) and ascorbic acid (VC) at -20°C. The dynamic adsorption characteristics of methylene blue (MB) in GO/PAM structured adsorption medium were investigated. With the introduction of GO which rich in —OH and —COOH groups, the adsorption capacities were 178.65 mg/g~201.58 mg/g. Structured continuous adsorption medium was prepared by one-step polymerization of crystallization, in order to replace traditional bulk resin and ion exchange resin in the treatment of printing and dyeing wastewater.

Adsorptive Removal of Methylene Blue in Aqueous Solution with Alkali Activated Fly Ash

2013 ◽  
Vol 726-731 ◽  
pp. 629-633 ◽  
Author(s):  
Shou Cheng Zhu ◽  
Chun Guang Miao ◽  
Yan Wu ◽  
Hong Xing Yang
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Fly Ash ◽  
Textile Industry ◽  
Common Source ◽  
Dyeing Wastewater ◽  
Printing And Dyeing Wastewater ◽  
Treatment Processes ◽  
Finishing Processes ◽  
Alkali Activated

Dyeing and finishing processes applied in the textile industry are the most common source of water pollution. The wastewater containing dyes is difficult to treat. The fly ash modified by alkali was investigated in this study to evaluate the removal efficiency of methylene blue in aqueous solution. The experimental results shown that the efficiency of adsorption could be prominent improved by alkali activated fly ash. Alkali activated fly ash could be an economical adsorbents used for printing and dyeing wastewater treatment processes.

scholarly journals Biosynthesis of Silver Nanoparticles Using Orange Peel Extract for Application in Catalytic Degradation of Methylene Blue Dye

2021 ◽  
Vol 19 (6) ◽  
pp. 1-13
Author(s):  
Cathleen Simatupang ◽  
◽  
Vinod K Jindal ◽  
Ranjna Jindal ◽  
◽  
...  
Keyword(s):  
Methylene Blue ◽  
Silver Nanoparticles ◽  
Industrial Effluent ◽  
Orange Peel ◽  
Catalytic Degradation ◽  
Blue Dye ◽  
Process Conditions ◽  
Optimum Conditions ◽  
Orange Peel Extract ◽  
Peel Extract

Interest in the biosynthesis of silver nanoparticles (AgNPs) has been steadily increasing primarily due to their numerous applications in various fields, low-cost, use of non-toxic environmentally-friendly materials and easy implementation. This study focused on the biosynthesis of AgNPs using orange peel extract (OPE), optimization of process conditions, and application in catalytic degradation of methylene blue (MB) dye used in the textile industry. A central composite design in response surface methodology resulted in optimum conditions of 0.0075 g dry peel/mL for OPE concentration, pH of 11 and 1.5 mM silver nitrate concentration. The optimum conditions for the response variables corresponded to the peak absorbance of 0.79 and SPR wavelength of 403.8 nm in UV-vis spectra, and minimum particle size of 12.9 nm. In addition, peak absorbance and SPR wavelength appeared to be related to the size of the AgNPs. A full-factorial design for the catalytic degradation of MB dye by the biosynthesized AgNPs for 1 h indicated the maximum influence of AgNPs compared to the concentrations of MB dye and NaBH4 in decreasing order. The MB dye was reduced rapidly with NaBH4 in the presence of AgNPs due to their catalytic action. The findings of the study show the potential of OPE for the biosynthesis of AgNPs with excellent catalytic activity for the treatment of MB dye in industrial effluent.

Using of modified-bentonite as low-cost sorbent for removal of methylene blue dye from aqueous solution

2020 ◽  
Vol 27 (2) ◽  
pp. 45-54
Author(s):  
Saraa Muwafaq Ibrahim ◽  
Ziad T. Abd Ali
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Silanol Group ◽  
Infrared Spectrometry ◽  
Blue Dye ◽  
Ammonium Bromide ◽  
Vibration Band ◽  
Order Kinetic ◽  
Methylene Blue Dye ◽  
Modified Bentonite

Batch experiments have been studied to remove methylene blue dye (MB) from aqueous solution using modified bentonite. The modified bentonite was synthesized by replacing exchangeable calcium cations in natural bentonite with cationic surfactant cetyl trimethyl ammonium bromide (CTAB). The characteristics of modified bentonite were studied using different analysis such as Scanning electronic microscopy (SEM), Fourier transform infrared spectrometry (FTIR) and surface area. Where SEM shows the natural bentonite has a porous structure, a rough and uneven appearance with scattered and different block structure sizes, while the modified bentonite surface morphology was smooth and supplemented by a limited number of holes. On other hand, (FTIR) analysis that proved NH group aliphatic and aromatic group of MB and silanol group are responsible for the sorption of contaminate. The organic matter peaks at 2848 and 2930 cm-1 in the spectra of modified bentonite which are sharper than those of the natural bentonite were assigned to the CH2 scissor vibration band and the symmetrical CH3 stretching absorption band, respectively, also the 2930 cm-1 peak is assigned to CH stretching band. The batch study was provided the maximum removal efficiency (99.99 % MB) with a sorption capacity of 129.87 mg/g at specified conditions (100 mg/L, 25℃, pH 11 and 250rpm). The sorption isotherm data fitted well with the Freundlich isotherm model. The kinetic studies were revealed that the sorption follows a pseudo-second-order kinetic model which indicates chemisorption between sorbent and sorbate molecules.

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