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 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 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.

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.

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.

Experimental Research on the Treatment of Printing and Dyeing Wastewater Using Ultrasound Combined with Fenton Reagent

2015 ◽  
Vol 713-715 ◽  
pp. 2703-2705
Author(s):  
Ying Gang Wang ◽  
Lin Lin ◽  
Teng Fei Liu ◽  
Jin Meng Zhang
Keyword(s):  
Hydrogen Peroxide ◽  
Experimental Research ◽  
Removal Rate ◽  
Orthogonal Test ◽  
Experimental Results ◽  
Ultrasonic Power ◽  
Dyeing Wastewater ◽  
Fenton Reagent ◽  
Reaction Conditions ◽  
Printing And Dyeing Wastewater

Experimental research on the treatment of printing and dyeing wastewater has been carried out. The method of ultrasonic combined Fenton has been used.Separately by using ultrasonic and Fenton oxidation method to treat printing and dyeing wastewater, the hydrogen peroxide dosage, FeSO4•7H2O dosage, shaking time, pH value, ultrasonic time, ultrasonic power and other factors are investigated.The COD and chromaticity removal effect of printing and dyeing wastewater are calculated. The experimental results show that the above factors have a certain impact on the treatment effect. Based on these results, the orthogonal test method is used in this experiment, the optimal conditions of ultrasound combined with Fenton reagent for dealing printing and dyeing wastewater has been determined.The orthogonal experimental results show that the optimal reaction conditions of orthogonal test are below:pH value is 3, the best time for the experiment is 1.5h, hydrogen peroxide dosage is 5mL, seven water ferrous sulfate dosage is 0.7grams, ultrasonic power is 142.5W. Experiments are conducted in accordance with the best reaction conditions. On the optimal process conditions, the removal rate of COD reaches 94.6% and the chroma removal rate reaches 87.5%. The effect of using ultrasonic combined with Fenton reagent to treat printing and dyeing wastewater is better than the use of single method.

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.

Manufacturing of Zinc Powder with Dendritic Microstructure for Zinc-Air Battery by Electrodeposition

2012 ◽  
Vol 460 ◽  
pp. 300-303 ◽  
Author(s):  
Qing Hua Tian ◽  
Li Zhen Cheng ◽  
Jing Xin Liu ◽  
Xue Yi Guo
Keyword(s):  
Current Density ◽  
Zinc Powder ◽  
Process Conditions ◽  
Test Results ◽  
Optimal Process ◽  
Solution System ◽  
Dendritic Microstructure ◽  
Factors Affecting ◽  
Series Of Experiments ◽  
Air Battery

Fine zinc powder with dendritic microstructure is applied in preparation of cathode of zinc-air battery. Based on a series of experiments, the electrodeposition was determined for the preparation of zinc powder with dendritic microstructure in the solution system of Zn2+-NH4+-SO42--H2O. The main factors affecting the process such as current density、temperature、concentration of reactants and schedule of brushing powder were investigated comprehensively. The optimal process conditions are15g/L Zn2+, 30～40g/L(NH4)2SO4, 800 Am-2current density at 30°C,with the schedule of brushing powder is 2 minutes. Based on the test results the optimal conditions, fine zinc powder with dendritic microstructure can be fabricated by electrodeposition.

scholarly journals Particle Size Distribution Based Occurrence Features of Organic Components in Printing and Dyeing Wastewater Under a Treatment Process

2019 ◽  
Vol 118 ◽  
pp. 04009
Author(s):  
Yuan Li ◽  
Jie Liu ◽  
Yibiao Yu ◽  
Hao Zhu ◽  
Zheng Shen ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Reverse Osmosis ◽  
Treatment Process ◽  
Dyeing Wastewater ◽  
Wastewater Treatment Process ◽  
Printing And Dyeing Wastewater ◽  
Sedimentation Tank ◽  
The Relationship

A more detailed occurrence features of organic matters in the printing and dyeing wastewater, based on its particle size distribution (PSD) and along with a wastewater treatment process, was conducted to provide a support for advanced treatment. Results suggested that, (1) In the dyeing wastewater, the occurrence characteristic of COD was: soluble>supra colloidal>colloidal>settleable; However, for protein, the supra colloidal was dominant, followed by the soluble. The feature of the polysaccharide was consistent with COD’s. In the wastewater, 29.66% of COD could be attributed to proteins and 3.45% of the COD could be attributed to polysaccharides. (2) The relationship among the forms of COD in the primary sedimentation tank, aerobic tank, secondary sedimentation tank, and reverse osmosis-treated concentrated effluent was consistent, that was: soluble>colloidal>supra colloidal>settleable. (3) In the primary sedimentation tank, the settleable COD was almost completely removed; In the aerobic tank, the residual super colloidal COD was not much; After MBR-RO treatment, the COD in the reverse osmosis concentrated water was almost dissolved and only a little presented in other forms.

Study on Extracting Potassium from Potassium Feldspar with Molten Salt Leaching Method

2012 ◽  
Vol 524-527 ◽  
pp. 1078-1081
Author(s):  
Jian Guo Song ◽  
Xin Zhi Wang ◽  
Shao Dan Xiao ◽  
Wei Liu
Keyword(s):  
Reaction Time ◽  
Molten Salt ◽  
Potassium Feldspar ◽  
Process Conditions ◽  
Temperature Reaction ◽  
Optimal Process ◽  
Potash Feldspar ◽  
Salt Leaching ◽  
Effects Of Temperature

This article aims to study the technology of extracting potassium from potassium feldspar with molten salt leaching method and to analyze the effects of temperature, reaction time and other factors on extracting potassium, concluding the optimal process conditions of extracting potassium with molten leaching method from potash feldspar.

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