Recent developments and application of bimetallic based materials in water purification

Allam, Bharat Kumar; Musa, Neksumi; Debnath, Abhijit; Usman, Usman Lawal; Banerjee, Sushmita

doi:10.1016/j.envc.2021.100405

Cited by 26 publications

(5 citation statements)

References 188 publications

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“…Yet, owing to the various hazardous nature of some nanomaterials to aquatic biota, regulations of these materials from their fabrications and commercial uses are of significant importance. One of the major challenges associated with the synthesis of nanomaterial is the use of less noxious chemicals and reductions in the required energy for acquiring pure, stable, smaller, and less harmful nanoparticles with well-improved properties [4]. However, presently, no wholistic standard techniques are available for assessment of the toxic nature of the fabricated nanomaterials, this complicated the classification and commercialization of the nanomaterials for industrial application.…”

Section: Challenges and Regulations Of Nanomaterialsmentioning

confidence: 99%

Toxicological Effects of Nanomaterials on the Aquatic Biota

Usman

2023

Emerging Nanomaterials and Their Impact on Society in the 21st Century

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Globally nanotechnology has transformed many sectors of human endeavour due to the innovative introduction of different unique materials and products in various areas. Presently large quantities of nanomaterials are synthesized and are essential for several industrial applications. This facilitates and enhances research in biophysics, biochemistry, wastewater treatment, etc. Nanotechnology and other science-related discipline have been combined to synthesize novel nanomaterials through modification of their shapes, composition, and dimension which can be used for various applications in medicines, agriculture, environmental remediation, etc. Despite their peculiar advantages and wide application in several industrials and domestic sectors, fabricated materials of nano-size scale have been raising concerns of unsafety for both human and aquatic biota, due to their incessant release into the aquatic ecosystem. These nanomaterials are ingested by the aquatic biota, from which they bioaccumulate in the organism’s body and hence pass to humans via the food chain. Within the organism’s body, nanomaterials serve as foreign material with different physicochemical characteristics because of their peculiar small sizes. Thus, the harmful effect of nanomaterials on aquatic biota has been generating great concern among the scientific communities. Thus, they can interfere with the normal mechanisms of physiological activities. The present chapter focuses on the sources of the nanomaterials in the aquatic ecosystem, the route of exposure, their process of transformation and interactions, their possible toxicity to the aquatic biota, challenges posed by the nanomaterials, and prospects.

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Section: Challenges and Regulations Of Nanomaterialsmentioning

confidence: 99%

Toxicological Effects of Nanomaterials on the Aquatic Biota

Usman

2023

Emerging Nanomaterials and Their Impact on Society in the 21st Century

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“…Recent research reported that the combination of metal nanoparticles with graphene improved the electro-catalytic properties and removal of chlorinated phenols [29]. Allam et al have reported graphene-impregnated nanoparticles with bimetallic Fe/Ni; Fe-Ni/D072 will enhance hydrogenolysis, which is the main dechlorination pathway for both TCE and TCP [30]. All the described information infers the feasibility of catalytic hydrodechlorination via hydrogen addition by the bimetallic iron particles and also demands suitable agents to prevent aggregates and passivation.…”

Section: Introductionmentioning

confidence: 99%

Study on free and entangled binary metal nanocatalysts for removal of 2,4,6-trichlorophenol in aqueous phase: a comparative study

Felshia

Gnanamani

2023

Nanotechnology

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The present study highlights the comparative catalytic removal of 2,4,6-trichlorophenol (TCP) in aqueous phase by binary metal nanocatalysts in free as well as entangled forms. In brief, binary nanocatalysts comprising of Fe-Ni are prepared, characterized, and subsequently entangled in reduced graphene oxide (rGO) for better performances and reuse applications. Optimization studies on the mass of free and rGO-entangled binary nanocatalysts with respect to TCP concentration and other environmental factors are studied in detail. Results suggest binary nanocatalysts in free form at 40 mg/ml took 300 min to dechlorinate 600 ppm of TCP, whereas rGO-entangled Fe-Ni catalyst took only 190 min. Experiments on the reuse of the catalyst with respect to removal efficiency implied compared to free form rGO-entangled nanocatalysts exemplify more than 98% of removal efficacy even after 5 times of exposure to 600 ppm TCP concentration. High-performance liquid chromatography analysis display a pattern of sequential dechlorination during catalytic process. Followed by dechlorination, the phenol-enriched aqueous phase exposed to Bacillus licheniformis SL10, which degrades the phenol effectively within 24 hours. In conclusion, the prepared binary metal nanocatalysts, both in free as well as in rGO-entangled forms, effectively dechlorinate 2,4,6-TCP contaminations in aqueous phase, but with significant differences in time taken for the removal. And entanglement facilitate the reuse of the catalyst more effectively. The accumulated phenol biocatalytically removed and suggests the reuse applications of treated water.

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“…Water resources have become increasingly contaminated due to rapid industrialization and dumping large quantities of wastes from various sources into waterways. [1][2][3][4] The heavy metal levels in industrial effluents discharged into rivers are alarming. Heavy metals, toxic sludge, solvents, and other hazardous industrial waste are dumped into waterways at 300-400 million metric tons per year.…”

Section: Introductionmentioning

confidence: 99%

“…As a result of exposure to mercury and cadmium contamination, the human body suffers various physical and mental ailments. 4,[12][13][14] Because of this, the removal of heavy metal pollutants from water is a pressing necessity. As water scarcity grows, we cannot afford to waste wastewater, but we can decontaminate it and reuse it for other purposes.…”

Section: Introductionmentioning

confidence: 99%