Recent advances in adsorptive removal and catalytic reduction of hexavalent chromium by metal–organic frameworks composites

Mahmoud, Mohamed E.; Elsayed, Sarah; Mahmoud, Safe ELdeen M.E.; Aljedaani, Reham O.; Salam, Mohamed Abdel

doi:10.1016/j.molliq.2021.118274

Cited by 43 publications

(20 citation statements)

References 202 publications

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“…In another report by Kumar and co-workers, 5 the detoxification of chromium by MOFs was investigated. Most recently, the applications of MOF-based composites in adsorptive removal and catalytic degradation of hexavalent chromium were reported by Mahmoud et al 6 In the current review, we emphasize the latest progress in the fabrication techniques of photocatalysts, based on MOFs, and highlight their utilizations in the photoreduction of Cr (VI) . Various types of MOF-based photocatalytic systems are comprehensively reviewed such as unary MOF photocatalysts (including bimetallic MOFs), binary MOF/semiconductor heterojunction systems (inorganic/organic), ternary MOF/ organic semiconductor/metal nanoparticles (NPs), and MOFderived photocatalysts (zeolitic imidazolate frameworks (ZIFs) and covalent organic frameworks (COFs)).…”

Section: Introductionmentioning

confidence: 88%

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Recent Progress in the Development of MOF-Based Photocatalysts for the Photoreduction of Cr^(VI)

Jafarzadeh

2022

ACS Appl. Mater. Interfaces

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There has been a direct correlation between the rate of industrial development and the spread of pollution on Earth, particularly in the last century. The organic and inorganic pollutants generated from industrial activities have created serious risks to human life and the environment. The concept of sustainability has emerged to tackle the environmental issues in developing chemical-based industries. However, pollutants have continued to be discharged to water resources, and finding appropriate techniques for the removal and remedy of wastewater is in high demand. Chromium is one of the high-risk heavy metals in industrial wastewaters that should be removed via physical adsorption and/or transformed into less hazardous chemicals. Photocatalysis as a sustainable process has received considerable attention as it utilizes sunlight irradiation to remedy Cr(VI) via a cost-effective process. Numerous photocatalytic systems have been developed up to now, but metal–organic frameworks (MOFs) have gained growing attention because of their unique versatilities and facile structural modulations. A variety of MOF-based photocatalysts have been widely employed for the photoreduction of Cr(VI). Here, we review the recent progress in the design of MOF photocatalysts and summarize their performance in photoreduction reactions.

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Section: Introductionmentioning

confidence: 88%

“…In another report by Kumar and co-workers, the detoxification of chromium by MOFs was investigated. Most recently, the applications of MOF-based composites in adsorptive removal and catalytic degradation of hexavalent chromium were reported by Mahmoud et al…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in the Development of MOF-Based Photocatalysts for the Photoreduction of Cr^(VI)

Jafarzadeh

2022

ACS Appl. Mater. Interfaces

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“…As most inorganic pollutions are hard to degrade, some catalytic redox reactions can make the valence of metal transform to a low-toxic state, providing another way for inorganic pollution treatment. 80,81…”

Section: Multifunctional Mofs For Water Pollution Treatmentmentioning

confidence: 99%

Multi-functional metal–organic frameworks for detection and removal of water pollutions

Pang

2022

Chem. Commun.

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“…Chromium is among the heavy metals generally used in alloying, coating, dyeing, leather tanning and anti-corrosion materials [4]. Chromium (VI) poisoning from oral ingestion typically causes severe symptoms, including gastrointestinal ulcers, fever, diarrhea, toxic nephritis, liver damage, coma, and eventually death [5]. Chromium toxicity and carcinogenicity are complicated issues.…”

Section: Introductionmentioning

confidence: 99%

“…Electrochemical reduction, electrodialysis, electrocoagulation, and electrodeionization belong to electrochemical technology, while photocatalysis is an example of advanced oxidation technology [11]. However, some of these techniques are suffering from high cost with respect to employed materials, methodologies, and instrumentations [5]. On the other hand, adsorption technology has been extensively used in the treatment of wastewater of various toxic pollutants because of its great effectiveness, convenience of use, and simplicity of operation [12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Effective removal of hexavalent chromium from water by sustainable nano-scaled waste avocado seeds: adsorption isotherm, thermodynamics, kinetics, and error function

Mahmoud

El‐Said

Ibrahim

et al. 2022

Biomass Conv. Bioref.

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In the current investigation, an efficient low-cost nano-scaled material was prepared from waste avocado seeds (NASs) and employed as a sustainable nanosorbent for removal of hexavalent chromium ions. The adsorption and surface characteristics with respect to the availability of functional groups, basic component elements, and structural properties of NASs were achieved by different techniques. Analysis of NASs referred to the presence of carbon and oxygen contents providing 97.21%. The NASs particles were homogenously identified and ranged between 18.68 and 19.05 nm. The impact of various affecting adsorption parameters on hexavalent chromium ions removal was elaborated and optimized at pH 2.0, NASs dose 10 mg, contact time 30 min, and temperature 25 °C by the batch adsorption assay. Fifteen linear and nonlinear modeling tests were applied to evaluate the adsorption isotherms and arranged in the following fitting order: Tempkin < BET < Dubinin-Radushkevich < Generalized < Halsey ˂ Flory–Huggins < Freundlich < Harkins–Jura ˂ Langmuir for linear formulas and Weber-van Vliet < Langmuir < Generalized < Radke–Prausnitz (II) < Radke–Prausnitz (III) < Fritz-Schlunder IV < Baudu < Multilayer < Fritz-Schlunder V < Toth for nonlinear formulas with 2 to 5 parameters. Linear and nonlinear pseudo-second-order models, intraparticle diffusion, and Elovich models were also scrutinized, and both pore diffusion and film were similarly involved in the rate-limiting step. The values of ΔS° (0.21 kJ/mol), ΔH° (− 41.02 kJ/mol) and ΔG° (− 28.30 to − 19.97 kJ/mol) at high concentration of hexavalent chromium (50 mg L−1) and a temperature range of 20–60 °C reflected the disordering, spontaneously exothermic adsorption process. The activation energy (Ea) was also confirmed to include the diffusion process at the activation energy in the rate-limiting step. The potential application of NASs in hexavalent chromium removal from wastewater, seawater, and tap water as real aqueous matrices referred to excellent percentage removal values in the range from 98.44 to 98.86%. Based on the outlined results, one can deduce that excellent performance and efficiency for removal of high hexavalent chromium concentration at high temperature, low nanosorbent mass, and low pH from different aqueous matrices were accomplished by the evaluated NAS nanosorbent. Accordingly, the investigated NAS nanosorbent is recommended to apply in high stress industrial and wastewater treatment plants.

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Recent advances in adsorptive removal and catalytic reduction of hexavalent chromium by metal–organic frameworks composites

Cited by 43 publications

References 202 publications

Recent Progress in the Development of MOF-Based Photocatalysts for the Photoreduction of Cr^(VI)

Recent Progress in the Development of MOF-Based Photocatalysts for the Photoreduction of Cr^(VI)

Multi-functional metal–organic frameworks for detection and removal of water pollutions

Effective removal of hexavalent chromium from water by sustainable nano-scaled waste avocado seeds: adsorption isotherm, thermodynamics, kinetics, and error function

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Recent advances in adsorptive removal and catalytic reduction of hexavalent chromium by metal–organic frameworks composites

Cited by 43 publications

References 202 publications

Recent Progress in the Development of MOF-Based Photocatalysts for the Photoreduction of Cr(VI)

Recent Progress in the Development of MOF-Based Photocatalysts for the Photoreduction of Cr(VI)

Multi-functional metal–organic frameworks for detection and removal of water pollutions

Effective removal of hexavalent chromium from water by sustainable nano-scaled waste avocado seeds: adsorption isotherm, thermodynamics, kinetics, and error function

Contact Info

Product

Resources

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Recent Progress in the Development of MOF-Based Photocatalysts for the Photoreduction of Cr^(VI)

Recent Progress in the Development of MOF-Based Photocatalysts for the Photoreduction of Cr^(VI)