scholarly journals Study on Adsorption of Dye Wastewater by Modified Fly Ash

2021 ◽  
Vol 267 ◽  
pp. 02020
Author(s):  
Yanping Qu ◽  
Dongqing Yan ◽  
Rushuang Su ◽  
Wenshuo Hu ◽  
Yanyan Dai
Keyword(s):  
High Temperature ◽  
Fly Ash ◽  
Methyl Orange ◽  
Dye Adsorption ◽  
Raw Material ◽  
Dye Wastewater ◽  
Adsorption Time ◽  
Decolorization Rate ◽  
Methyl Orange Dye ◽  
Modified Fly Ash

Used fly ash as raw material, it was modified by acid, alkali and high temperature to produce modified fly ash adsorbent, sulfuric acid modified fly ash adsorbent, sodium hydroxide modified fly ash adsorbent and high temperature modified fly ash adsorbent. In this paper, the effects of adsorbent dosage, adsorbent adsorption time, initial dye concentration, wastewater pH and temperature on dye adsorption were studied. The results showed that: the acid modified fly ash adsorbent had a good treatment effect on the dye; when the dosage of fly ash was 1.00 g, the adsorption time was 90 min, the pH of wastewater was 4, and the temperature was 45 °C, the decolorization rate of 60 mg/L methyl orange dye can reached more than 70%; when the dosage of fly ash was 0.20 g, the adsorption time was 60 min, the pH of wastewater was 3, and the temperature was 35 °C, the decolorization rate of 20 mg/L methyl orange dye can be achieved. The decolorization rate of Congo red can reached more than 80%.

scholarly journals Characterization of algae residue biochar and its application in methyl orange wastewater treatment

2021 ◽  
Author(s):  
Hao Zhu ◽  
Haiming Zou
Keyword(s):  
Electron Microscopy ◽  
Methyl Orange ◽  
Raw Material ◽  
Batch Adsorption ◽  
Adsorption Method ◽  
Adsorption Effect ◽  
Transmission Electron ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order ◽  
Methyl Orange Dye

Abstract In this work, Spirulina residue was used as the raw material to prepare different biochars by changing the pyrolysis time. Moreover, the obtained products were characterized by scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, and X-ray diffraction energy spectrum. This experiment used the batch adsorption method to study the adsorption effect of pH, dosage, and pyrolysis time on methyl orange. The adsorption of methyl orange onto Spirulina residue biochar fitted with the Langmuir isotherm model and pseudo-second-order kinetics. The results showed that the surface functional groups of Spirulina residue biochar obtained by dry pyrolysis were abundant, and it can effectively adsorb methyl orange dye in an aqueous solution. The sample prepared at 500 °C for 5 h had the best adsorption effect on methyl orange. The change of pyrolysis time will affect the physicochemical properties of biochar from Spirulina residue, thereby affecting its adsorption effect on methyl orange dye. The analysis showed that the chemical adsorption of Spirulina residue biochar on methyl orange might be the primary way of dye removal. The results can provide a reference for preparing biochar from algae residue and biochar application in the removal of dye wastewater.

Simultaneous Adsorption of Methyl Orange and Heavy Metals from Solution Using Fly Ash

2009 ◽  
Vol 79-82 ◽  
pp. 247-250 ◽  
Author(s):  
Maria Visa ◽  
Alexandru Enesca ◽  
Anca Duta
Keyword(s):  
Heavy Metals ◽  
Fly Ash ◽  
Methyl Orange ◽  
Treatment Process ◽  
Ionic Species ◽  
Single Step ◽  
Langmuir Model ◽  
Adsorption Mechanisms ◽  
Modified Surface ◽  
Modified Fly Ash

In a wastewater resulted from the dyes finishing industry there are amounts of dyes (very common Methyl Orange) and heavy metals resulted mainly from the organo-metallic dyes. Heavy metals (Cd2+ and Cu2+) advanced removal is usually proposed via adsorption and the use of modified fly ash as adsorbent represents a sustainable solution. The paper presents the results obtained in investigating the effect of methyl orange adsorbed onto the fly ash with modified surface, on the removal efficiency of cadmium and copper ionic species, considering the final application: a single step treatment process applied for wastewaters containing both heavy metals and dyes. The adsorption mechanisms are discussed based on the kinetic results and on the Langmuir model.

scholarly journals Adsorption of Methyl Orange from Wastewater by using Biochar

2019 ◽  
Vol 20 (3) ◽  
pp. 23-29
Author(s):  
Mohammed Abdulrahman Hanoon ◽  
Muthanna J. Ahmed
Keyword(s):  
Methyl Orange ◽  
Thermodynamic Parameters ◽  
Adsorption Process ◽  
Langmuir Model ◽  
Raw Material ◽  
Effect Of Ph ◽  
Methyl Orange Dye

The biochar prepared from sawdust raw material was applied in this study for the treatment of wastewater polluted with methyl orange dye. The effect of pH (2-11), initial concertation (50-250 mg/L) and time were studied. The isotherm of Langmuir, Frendluch and temkin models studied. The Langmuir model was the best to explain the adsorption process, maximum uptake was 136.67 mg/g at 25Co of methyl orange dye. Equilibrium reached after four hours of contact for most adsorbents.The values of thermodynamic parameters ∆G were negative at various temperatures, so the process spontaneous, while ∆H values were 16683 j/mol and ∆S values was 60.82 j/mol.k.

A Review of Fly Ash-Based Geopolymer Lightweight Bricks

2015 ◽  
Vol 754-755 ◽  
pp. 452-456 ◽  
Author(s):  
Wan Mastura Wan Ibrahim ◽  
Kamarudin Hussin ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Aeslina Abdul Kadir ◽  
Mohammed Binhussain
Keyword(s):  
Sustainable Development ◽  
High Temperature ◽  
Fly Ash ◽  
Power Plants ◽  
Ordinary Portland Cement ◽  
Source Material ◽  
Embodied Energy ◽  
Raw Material ◽  
Environmental Aspects ◽  
The World

This paper offers a review on production of fly ash-based geopolymer bricks.Bricks are the world’s most versatile, durable and reliable construction material.Conventional bricks are produced from clay with high temperature kiln firing or from ordinary Portland cement (OPC) concrete,and thus contain high embodied energy and have large carbon footprint. In many areas of the world,there is already a shortage of natural source material for production of the conventional bricks. For environmentalprotection and sustainable development, extensive research has been conducted on productionof bricks from waste materials.Fly ash is a waste material of coal firing thermal plants and its accumulation near power plants causes severe pollution problems. Therefore, its utilization as a raw material for brick making will be a very beneficial solution in terms of economic and environmental aspects.

Study on Decolorization of Methyl Orange Dye Wastewater by DC Stream Discharge with MgO-CuO-Al2O3 Catalyst

2014 ◽  
Vol 522-524 ◽  
pp. 420-423
Author(s):  
Hong Duan Xie ◽  
Cong Su ◽  
Chun Yu Wang ◽  
Li Duo Wang ◽  
Sheng Hou Liu ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Methyl Orange ◽  
Removal Efficiency ◽  
Dye Wastewater ◽  
Initial Concentration ◽  
Stream Discharge ◽  
Experimental Parameters ◽  
Azo Group ◽  
Methyl Orange Dye ◽  
Better Than

The decolorization of methyl orange wastewater by DC stream discharge with MgO-CuO-Al2O3 catalyst was investigated. The removal efficiency was studied for different experimental parameters. Results showed that the removal efficiency by discharge with catalyst was better than discharge only. The removal efficiency was 98% under the condition of applied voltage 18kV, current 9mA, volume of catalyst 20cm3, initial concentration 40mg/L with treatment for 10min. The intensity of methyl orange absorption peak (465nm) gradually weakened and disappeared by discharge with catalyst, the conjugated system composed of azo group and benzene in the molecular structure was destroyed, methyl orange molecules were degraded effectively.

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