Nano-metal oxides-activated carbons for dyes removal: A review

Bichave, Mugdha S.; Kature, Akshta Y.; Koranne, Shreya V.; Shinde, Rutuja S.; Gongle, Akhila S.; Choudhari, Vishnu P.; Topare, Niraj S.; Raut-Jadhav, Sunita; Bokil, Shantini A.

doi:10.1016/j.matpr.2022.08.451

Cited by 22 publications

(14 citation statements)

References 90 publications

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“…Adsorption is considered to be an attractive alternative since it stands out through operation simplicity, avoidance of supplementary chemicals, and nonexistence of undesirable products [ 36 ]. Numerous adsorbents such as activated carbon [ 37 , 38 , 39 ], silicates [ 40 ], porous geopolymers [ 41 ], materials prepared from agricultural wastes [ 42 , 43 ] or obtained from biomass residue [ 44 ], materials containing nanoparticles of various oxides [ 45 , 46 , 47 ], composites [ 48 , 49 ], etc., are reported as favorable adsorbents. They possess important surface area, high pore sizes, and structures permitting high affinity with various compounds; therefore, they are listed as efficiently retaining colored contaminants from aqueous media.…”

Section: Introductionmentioning

confidence: 99%

Performance of Dye Removal from Single and Binary Component Systems by Adsorption on Composite Hydrogel Beads Derived from Fruits Wastes Entrapped in Natural Polymeric Matrix

Grigoraș

Simion

Favier

et al. 2022

Gels

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The treatment of contaminated water is currently a major concern worldwide. This work was directed towards the preparation of a composite hydrogel by entrapping cherry stones powder on chitosan, which is known as one of the most abundant natural polymers. The synthesized material was characterized by scanning electron microscopy, by Fourier transform infrared spectroscopy, and by the point of zero charge determination. Its ability to remove two azo dyes models (Acid Red 66 and Reactive Black 5) existing in single form and in binary mixture was evaluated. Response Surface Methodology–Central Composite Design was used to optimize three parameters affecting the process while targeting the lowest final contaminant concentrations. The best results were obtained at pH 2, an adsorbent dose of 100 g/L, and a temperature of 30 °C, when more than 90% of the pollutants from the single component systems and more than 70% of those of the binary mixtures were removed from their aqueous solutions. The adsorption process was in accordance with Elovich and pseudo-second-order kinetic models, and closely followed the Freundlich and Temkin equilibrium isotherms. The obtained results led to the conclusion that the prepared hydrogel composite possesses the ability to successfully retain the target molecules and that it can be considered as a viable adsorbent material.

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Section: Introductionmentioning

confidence: 99%

Performance of Dye Removal from Single and Binary Component Systems by Adsorption on Composite Hydrogel Beads Derived from Fruits Wastes Entrapped in Natural Polymeric Matrix

Grigoraș

Simion

Favier

et al. 2022

Gels

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show abstract

“…Metal oxides and metal-based nanomaterials play a significant role in heavy metal remediation due to their unique properties and high surface area-to-volume ratios, which make them efficient adsorbents for removing heavy metals from contaminated environments (Gupta et al, 2021;Ani and Egbosiuba, 2023;Bichave et al, 2023). These nanomaterials can be tailored to target specific heavy metals, offering a versatile and effective approach to remediation.…”

Section: Metal-based Nanomaterials For Efficient Heavy Metal Remediationmentioning

confidence: 99%

Nano-revolution in heavy metal removal: engineered nanomaterials for cleaner water

Karnwal,

Malik

2024

Front. Environ. Sci.

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Engineered nanomaterials have emerged as a promising technology for water treatment, particularly for removing heavy metals. Their unique physicochemical properties enable them to adsorb large quantities of metals even at low concentrations. This review explores the efficacy of various nanomaterials, including zeolites, polymers, chitosan, metal oxides, and metals, in removing heavy metals from water under different conditions. Functionalization of nanomaterials is a strategy to enhance their separation, stability, and adsorption capacity. Experimental parameters such as pH, adsorbent dosage, temperature, contact time, and ionic strength significantly influence the adsorption process. In comparison, engineered nanomaterials show promise for heavy metal remediation, but several challenges exist, including aggregation, stability, mechanical strength, long-term performance, and scalability. Furthermore, the potential environmental and health impacts of nanomaterials require careful consideration. Future research should focus on addressing these challenges and developing sustainable nanomaterial-based remediation strategies. This will involve interdisciplinary collaboration, adherence to green chemistry principles, and comprehensive risk assessments to ensure the safe and effective deployment of nanomaterials in heavy metal remediation at both lab and large-scale levels.

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“…Adsorption is a typical mass transfer process that can be divided into physical and chemical adsorption according to the nature of surface interaction forces [21,22]. The exploration of adsorbents and photocatalysts for wastewater purification has recently expanded to include metallic oxides [23,24], biochars [25], emerging 3D printed materials [26], and organic/inorganic hybrid materials [27,28], etc. Silicates offer a relatively clean and inexpensive option for removing contaminants from aqueous medium, attributed to their high ion exchange capacity, reactive silanol groups, low or null toxicity, and high swelling/expansion capacity.…”

Section: Introductionmentioning

confidence: 99%

Recent advances of silicate materials for wastewater treatment: a review

Xu,

Wang,

2024

Mater. Res. Express

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Heavy metal ions and organic pollutants cause irreversible damage to water environment, thereby posing significant threats to the well-being of organisms. The techniques of adsorption and photocatalytic degradation offer versatile solutions for addressing water pollution challenges, attributed to their inherent sustainability and adaptability. Silicates exhibit exceptional practicality in the realm of environmental protection owing to their structural integrity and robust chemical/thermal stability during hybridization and application process. Furthermore, the abundance of silicate reserves, coupled with their proven effectiveness, has garnered significant attention in recent years. This detailed review compiles and analyzes the extensive body of literature spanning the past six years (2018-2023), emphasizing the pivotal discoveries associated with employing silicates as water purification materials. This review article provides a comprehensive overview of the structure, classification, and chemical composition of diverse silicates and offers a thorough descriptive analysis of their performance in eliminating pollutants. Additionally, the utilization of diatomite as either precursors or substrates for silicates, along with the exploration of their corresponding purification mechanisms is discussed. The review unequivocally verifies the efficiency of silicates and their composites in the effective elimination of various toxic pollutants. However, the development of novel silicates capable of adapting to diverse environmental conditions to enhance pollution control, remains an urgent necessity.

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Nano-metal oxides-activated carbons for dyes removal: A review

Cited by 22 publications

References 90 publications

Performance of Dye Removal from Single and Binary Component Systems by Adsorption on Composite Hydrogel Beads Derived from Fruits Wastes Entrapped in Natural Polymeric Matrix

Performance of Dye Removal from Single and Binary Component Systems by Adsorption on Composite Hydrogel Beads Derived from Fruits Wastes Entrapped in Natural Polymeric Matrix

Nano-revolution in heavy metal removal: engineered nanomaterials for cleaner water

Recent advances of silicate materials for wastewater treatment: a review

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