Adsorption of organic pollutants by nanomaterial-based adsorbents: An overview

Awad, Abdelrahman M.; Jalab, Rem; Benamor, Abdelbaki; Nasser, Mustafa S.; Ba‐Abbad, Muneer M.; El‐Naas, Muftah H.; Mohammad, Abdul Wahab

doi:10.1016/j.molliq.2019.112335

Cited by 195 publications

(71 citation statements)

References 225 publications

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“…Among all the tried dye removal by physical methods, adsorption is verified to be a more competitive technology owing to its simplicity, high efficiency, low cost, safe, eco‐friendless and the broadband ability to remove any kind of dyes [27] . These advantages make adsorption able to purify the drinking waters or treat the industrial wastewaters adopting natural or artificial adsorbent [28–32] . Based on their low cost, easy availability and high abundance, natural adsorbents have a considerable interest in the adsorptive elimination of dyes.…”

Section: Introductionmentioning

confidence: 99%

“…Bentonite is an aluminosilicate mineral and its structure is characterized by one Al 3+ octahedral sheet sandwiched between two tetrahedral sheets of Si 4+ [35] . Besides to its using in cement, paints and ceramic industries, pure or modified bentonite was utilized as a sorbent in subtraction of dyes and heavy metals from industrial wastewater [6,13,42–49,15,28,33–35,39–41] …”

Section: Introductionmentioning

confidence: 99%

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Superior Competitive Adsorption Capacity of Natural Bentonite in the Efficient Removal of Basic Dyes from Aqueous Solutions

Said

Goda

2021

ChemistrySelect

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In this study, natural bentonite has been used as a highly efficient, and low‐cost sorbent for the adsorptive removal of methylene blue (MB), crystal violet (CV), and fuchsine basic (FB) dyes from aqueous solutions. X‐ray fluorescence (XRF), Thermogravimetry and differential thermal analyses (TG‐DTA), X‐ray diffraction (XRD), Scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) analyses for bentonite clay were performed. Results revealed that bentonite is an excellent sorbent for the elimination of these dyes with maximum adsorption capacities of 598.8, 929.7 and 875.2 mg g−1 for MB, CV, and FB, respectively. In addition, thermodynamic results reflected that the adsorption process is a spontaneous, endothermic, and of chemisorption nature. While kinetic studies specified that the adsorption of these dyes is ruled by the film diffusion and pore diffusion mechanism. Moreover, simultaneous removal of these dyes from their binary and ternary mixtures was also examined. A Regeneration study demonstrated that, bentonite can be recycled several times with almost the same efficiency.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Superior Competitive Adsorption Capacity of Natural Bentonite in the Efficient Removal of Basic Dyes from Aqueous Solutions

Said

Goda

2021

ChemistrySelect

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“… Graphical representation of structure and absorption sites of graphene sheets (Reproduced with permission from [ 65 ]). …”

Section: Figurementioning

confidence: 99%

Nanotechnology in Wastewater Management: A New Paradigm Towards Wastewater Treatment

et al. 2021

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Clean and safe water is a fundamental human need for multi-faceted development of society and a thriving economy. Brisk rises in populations, expanding industrialization, urbanization and extensive agriculture practices have resulted in the generation of wastewater which have not only made the water dirty or polluted, but also deadly. Millions of people die every year due to diseases communicated through consumption of water contaminated by deleterious pathogens. Although various methods for wastewater treatment have been explored in the last few decades but their use is restrained by many limitations including use of chemicals, formation of disinfection by-products (DBPs), time consumption and expensiveness. Nanotechnology, manipulation of matter at a molecular or an atomic level to craft new structures, devices and systems having superior electronic, optical, magnetic, conductive and mechanical properties, is emerging as a promising technology, which has demonstrated remarkable feats in various fields including wastewater treatment. Nanomaterials encompass a high surface to volume ratio, a high sensitivity and reactivity, a high adsorption capacity, and ease of functionalization which makes them suitable for application in wastewater treatment. In this article we have reviewed the techniques being developed for wastewater treatment using nanotechnology based on adsorption and biosorption, nanofiltration, photocatalysis, disinfection and sensing technology. Furthermore, this review also highlights the fate of the nanomaterials in wastewater treatment as well as risks associated with their use.

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“…Considering intensive developments in nanotechnology especially in the fields of catalysis [ 3 – 9 ], extraction [ 10 – 14 ], carrier materials [ 15 ], and adsorption [ 16 – 21 ], polymer matrix nanocomposites have attracted a great deal of attention in the field of adsorption. The use of nanosized particles in the polymer matrixes provides high-performance hybrid nanocomposite materials with widespread applications.…”

Section: Introductionmentioning

confidence: 99%

Study on novel modified large mesoporous silica FDU-12/polymer matrix nanocomposites for adsorption of Pb(II)

2021

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In this study, porous methacrylate-modified FDU-12/poly(methyl methacrylate) and amine-modified FDU-12/Nylon 6 nanocomposites were synthesized via a facile solution casting protocol. The physicochemical properties of the prepared materials were studied using various characterization techniques including Fourier transform-infrared spectroscopy, field emission-scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption/desorption. After characterization of the materials, the prepared nanocomposites were applied as novel adsorbents for the removal of Pb(II) from aqueous media. In this regard, the effect of various parameters including solution pH, adsorbent amount, contact time, and initial concentration of Pb(II) on the adsorption process was investigated. To study the mechanism of adsorption, kinetic studies were conducted. The kinetic models of pseudo-first-order, pseudo-second-order, Elovich, and intraparticle diffusion were employed. The results revealed that the adsorption of Pb(II) onto methacrylate-modified FDU-12/poly(methyl methacrylate) and amine-modified FDU-12/Nylon 6 adsorbents followed the pseudo-second-order kinetic model. Also, different isotherms including Langmuir, Freundlich, and Dubinin-Radushkevich were applied to evaluate the equilibrium adsorption data. Langmuir isotherm provided the best fit with the equilibrium data of both adsorbents with maximum adsorption capacities of 99.0 and 94.3 mg g-1 for methacrylate-modified FDU-12/poly(methyl methacrylate) and amine-modified FDU-12/Nylon 6, respectively, for the removal of Pb(II).

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Adsorption of organic pollutants by nanomaterial-based adsorbents: An overview

Cited by 195 publications

References 225 publications

Superior Competitive Adsorption Capacity of Natural Bentonite in the Efficient Removal of Basic Dyes from Aqueous Solutions

Superior Competitive Adsorption Capacity of Natural Bentonite in the Efficient Removal of Basic Dyes from Aqueous Solutions

Nanotechnology in Wastewater Management: A New Paradigm Towards Wastewater Treatment

Study on novel modified large mesoporous silica FDU-12/polymer matrix nanocomposites for adsorption of Pb(II)

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