Adsorptive removal of Congo red from aqueous solution using zeolitic imidazolate framework–67

Tu, Nguyen Thi Thanh; Thien, Tran Vinh; Du, Pham Dinh; Châu, Võ Thị Thanh; Mau, Tran Xuan; Khiếu, Đinh Quang

doi:10.1016/j.jece.2018.03.031

Cited by 93 publications

(20 citation statements)

References 70 publications

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“…On the other hand, Tang and Zaini [15] reported a longer contact time to reach equilibrium at 60 h and 70 h for congo red concentrations of 150 and 400 mg/dm 3 , respectively. A longer contact time for an increase in dyes concentration has been reported in a number of studies [6,9,10,21,23,24,39,40,44]. For example, the equilibrium time increases from 20 min to 10 h with increasing congo red concentration from 50 to 300 mg/dm 3 by Ag-doped hydroxyapatite adsorption [39].…”

Section: Recent Studies On the Adsorption Of Malachite Green And Congmentioning

confidence: 75%

“…Among the studied adsorbents, the porous hierarchical α-Ni(OH) 2 with surface area of 191 m 2 /g yields a higher affinity of 49.7 dm 3 /mg, even though the removal capacity is small at 206 mg/g [41]. From Table 3, Tu et al [6] reported the removal of congo red onto zeolitic imidazolate framework derived from tetrahedral metal ions of Zn and Co. The adsorbent exhibits a surface area of 1388 m 2 /g for the adsorption capacity of 714 mg/g at pH = 7 [6].…”

Section: Recent Studies On the Adsorption Of Malachite Green And Congmentioning

confidence: 96%

“…Notwithstanding that, the vacant active sites progressively decreases with time thus decreasing the rate of adsorption. The rate constant generally decreases with increasing concentration because of the intensified collision of dye molecules [6,9,15,18,21,24,25,39,40,44]. On the other hand, a greater rate constant with increasing concentration is attributed to a stronger driving force to overcome mass transfer resistance.…”

Section: Recent Studies On the Adsorption Of Malachite Green And Congmentioning

confidence: 99%

“…From Table 3, Tu et al [6] reported the removal of congo red onto zeolitic imidazolate framework derived from tetrahedral metal ions of Zn and Co. The adsorbent exhibits a surface area of 1388 m 2 /g for the adsorption capacity of 714 mg/g at pH = 7 [6]. Despite the fact that a large surface area normally renders a high adsorption capacity, Zhang and co-workers [44] revealed a superior removal of 1429 mg/g congo red by Fe 3 O 4 @nSiO 2 @mSiO 2 core-shell microspheres with a small surface area of 38.2 m 2 /g.…”

Section: Recent Studies On the Adsorption Of Malachite Green And Congmentioning

confidence: 99%

“…It is commonly used in textile, paper, rubber and plastic industries [5]. In water, it creates a red colloidal solution, in which it is expected to metabolize to benzidine, a substance that has been reported to be carcinogenic and mutagenic to aquatic organisms [6]. 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.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Recent Studies On the Adsorption Of Malachite Green And Congmentioning

confidence: 75%

Section: Recent Studies On the Adsorption Of Malachite Green And Congmentioning

confidence: 96%

Section: Recent Studies On the Adsorption Of Malachite Green And Congmentioning

confidence: 99%

Section: Recent Studies On the Adsorption Of Malachite Green And Congmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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Hydroxyapatite nanoparticles decorated with metal–organic framework, Co‐Cu/ZIF@HAp, and evaluation of photocatalytic performance of the prepared nanocomposite in the degradation of organic pollutants

Bharali,

Kalita,

Chakraborty

et al. 2023

Applied Organom Chemis

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In this study, a novel hydroxyapatite (HAp)‐based composite, Co‐Cu/ZIF@HAp, was constructed through in situ growth and simultaneous sonication followed by magnetic string. Herein, the HAp‐based nanocomposite was obtained in which HAp was coated with cobalt–copper bimetallic zeolitic imidazolate framework (ZIF) in one‐pot synthesis method. The as‐synthesized composite was characterized by PXRD, FTIR, FE‐SEM, EDS, HR‐TEM, TGA‐DTG, XPS, BET, and UV‐DRS techniques, which suggested that HAp was well coated with bimetallic ZIF. The prepared composite was utilized as a catalyst in degradation of organic pollutants. Removal of organic pollutants such as organic dyes has become indispensable due to their higher stability, toxicity, and mutagenic nature. Two commonly found organic dyes, namely, Eosin Yellow (EY) and Brilliant Green (BG), were chosen for the investigation of photocatalytic activity of the as‐prepared catalyst. The degradation process was carried out under solar radiation, and there was no utilization of any oxidizing and reducing agent. Several parameters such as amount of catalyst dose, initial concentration of the dye solution, and effect of different pH conditions were evaluated for better understanding of photocatalytic performance of Co‐Cu/ZIF@HAp composite. Both EY and BG dyes were almost degraded up to 98.3% and 99.5%, respectively, within 50 min by the as‐prepared nanocomposite. Also, quenching test was performed that confirmed the formation of superoxide radicals (O2−.) as reactive oxygen species (ROS) in the photodegradation process. The as‐synthesized catalyst was repeatedly used for five times to ascertain the stability and reusability of catalyst.

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One‐pot green approach for rapid and effective anionic dye remediation: encapsulation within alginate nanocapsules

Alver,

Doğan,

Mert

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDThe encapsulation technique was applied to efficiently eliminate the Congo red (CR) from aqueous solutions. During the ionotropic gelation between Ca2+ ions and alginate (AL), CR was effectively entrapped within the AL nanocapsules in a one‐step process. Suitable conditions for efficient CR removal via encapsulation were revealed by the systematic optimization of parameters including pH, time, rpm, etc.ResultsAccording to the experimental observations, the stirring rate and temperature were found to have an insignificant effect on the encapsulation of CR molecules. When the pH value of the medium was 3, the highest level of encapsulation efficiency was achieved in a period of 15 min. At a preliminary CR concentration of 2000 mg/L and a pH value of 3, the encapsulation efficiency was calculated to be about 98.9%, with an encapsulation capacity of 2800 mg dye/g AL. The zeta potential values of AL and CR/AL nanocapsules were determined to be +7.05 eV and ‐14.9 eV and the results showed that the particles tended to agglomerate. TEM micrographs also showed that the nanopasscules were nanosized and agglomerated. Soil and UV degradation studies showed that the dye‐entrapped nanocapsules were noted to degrade remarkably. These results seriously highlighted the potential of encapsulation for dye removal in terms of the economical and practical applications.ConclusionEncapsulation was confirmed to be an economical and practical technique for effectively eliminating Congo red from aqueous solutions. Under UV light irradiation, the dye molecules entrapped within alginate nanocapsules displayed photodegradation.This article is protected by copyright. All rights reserved.

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Adsorptive removal of Congo red from aqueous solution using zeolitic imidazolate framework–67

Cited by 93 publications

References 70 publications

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

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

Hydroxyapatite nanoparticles decorated with metal–organic framework, Co‐Cu/ZIF@HAp, and evaluation of photocatalytic performance of the prepared nanocomposite in the degradation of organic pollutants

One‐pot green approach for rapid and effective anionic dye remediation: encapsulation within alginate nanocapsules

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