Adsorption characteristics of Congo red on carbonized leonardite

Ausavasukhi, Artit; Kampoosaen, Chonhawan; Kengnok, Oatchara

doi:10.1016/j.jclepro.2015.10.034

Cited by 84 publications

(23 citation statements)

References 50 publications

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“…The solution then filtered and the final dye concentration measured using UV-Vis spectrophotometer. The kinetic data was calculated based on Langmuir isotherm model below: ( 2 ) Where is initial concentration of procion red dye in the solution, is the dye concentration after t minutes, t is adsorption time, and is adsorption equilibrium constant.…”

Section: Kinetic Studymentioning

confidence: 99%

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Kinetic and thermodynamic adsorption studies of congo red on bentonite

Taher

Mohadi

Rohendi

et al. 2017

AIP Conference Proceedings

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Abstract. Adsorption of congo red on bentonite was studied kinetics and thermodynamically. Bentonite was physically activated at various temperatures and characterized using X-ray, and infrared. By increasing thermal temperature activation up to 500 o C can decrease the montmorillonite fraction with decreasing the peak was observed. The kinetic of adsorption suggests that the interaction of congo red-bentonite could be best represented by the first-order kinetics of Langmuir-Hinshelwood model. The adsorption process was exothermic with H in the range -4.43 to -9.76 kJ.mol -1 accompanied by increase in Gibbs energy. All results have shown that bentonite after physical activation could be used as an adsorbent for congo red adsorption.

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Section: Kinetic Studymentioning

confidence: 99%

“…One of dye molecule that commonly used in the staining process is Congo red dye as illustrated in fig. 1 [2]. The awareness lack of the people that involved in textile production will conduct pollution to the water bodies in settlement area.…”

Section: Introductionmentioning

confidence: 99%

Kinetic and thermodynamic adsorption studies of congo red on bentonite

Taher

Mohadi

Rohendi

et al. 2017

AIP Conference Proceedings

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“…Generally, the discharge of dyes into water resources even in a small amount is aesthetically displeasing, reduces light penetration, and affects the gas solubility for photosynthesis and respiration processes. While, physical contact with dissolved dyes may result in eye and skin irritation to human [7]. Table 1 summarizes the properties of malachite green and congo red dyes.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Malachite Green and Congo Red Dyes from Water: Recent Progress and Future Outlook

Swan

Zaini

2019

Ecological Chemistry and Engineering S

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Global concern on dyes-laden effluent has intensified over the years. Dyes are toxic, stable to light, and hardly oxidized and bio-degraded, hence causing severe physiological effects to living organisms. In water, dye hinders the light penetration for photosynthetic activity, consequently oxygen is deficient for respiration by aquatic creatures. Adsorption has been widely recognized as the effective removal strategy to abate dye wastewater. However, the quests to improve the adsorption efficiency are continuously sought through new adsorbents with special characters, while performing the removal process at optimum operating conditions. This short review aims to summarize the recent progress in adsorption studies of two commonly used industrial dyes, namely malachite green and congo red by various adsorbents. From the quoted studies, the oxidized mesoporous carbon yields a higher adsorption capacity of malachite green at 1265 mg/g, while Fe3O4@nSiO2@mSiO2 displays a greater capacity for congo red removal at 1429 mg/g. A superior adsorption relies not only on specific surface area but also the synergistic interactions of pore width and mesoporosity, surface chemistry, and operating conditions. The dyes properties and factors affecting the adsorption are also highlighted and discussed, with recommendations and future outlook.

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“…In recent years, clothing demand and the use of azo-type dyes, which represent around 60-70% of the total dye used industrially, have increased [1]. The presence of small amounts of dyes in aquatic systems reduces light penetration, which inhibits photosynthesis, affecting gas solubility and, consequently, trophic chain [2,3]. Azo dyes are synthetic, highly toxic, and present resistance to degradation by oxidizing agents, photodegradation, and biological systems [4,5].…”

Section: Introductionmentioning

confidence: 99%

Sequential Congo Red Elimination by UASB Reactor Coupled to Electrochemical Systems

Romero-Soto

García-Gómez

Álvarez

et al. 2021

Water

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Response surface methodology was investigated to determine the operational parameters on the degradation of Congo red dye (CR) and chemical oxygen demand (COD) in two electrochemical systems evaluated individually on effluent pretreated by an up-flow anaerobic sludge blanket (UASB) reactor. The UASB reactor was fed with 100 mg L−1 of CR and was operated for 12 weeks at different hydraulic residence times (HRTs) of 12 h, 10 h, and 8 h. Once stabilized at an HRT of 8 h, the effluent was collected, homogenized, and independently treated by electrooxidation (EO) and electrocoagulation (EC) cells. On both electrochemical systems, two electrode pairs were used; solid for EC (Fe and stainless-steel) and mesh electrodes for EO (Ti/PbO2 and Ti), and the effect of intensity (A), recirculation flow rate (mL min−1), and experimental time (min) was optimized on response variables. The maximum efficiencies of sequential systems for COD degradation and CR decolorization were 92.78% and 98.43% by EC and ≥99.84% and ≥99.71% by EO, respectively. Results indicate that the coupled systems can be used in textile industry wastewater treatment for the removal of dyes and the decolorized by-products.

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Adsorption characteristics of Congo red on carbonized leonardite

Cited by 84 publications

References 50 publications

Kinetic and thermodynamic adsorption studies of congo red on bentonite

Kinetic and thermodynamic adsorption studies of congo red on bentonite

Adsorption of Malachite Green and Congo Red Dyes from Water: Recent Progress and Future Outlook

Sequential Congo Red Elimination by UASB Reactor Coupled to Electrochemical Systems

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