Nanotechnology for Environmental Remediation: Materials and Applications

Guerra, Fernanda D.; Attia, Mohamed F.; Whitehead, Daniel C.; Alexis, Frank

doi:10.3390/molecules23071760

Cited by 440 publications

(143 citation statements)

References 164 publications

(171 reference statements)

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“…Nanomaterials have a wide range of applications regarding the technological and environmental challenges for wastewater treatments. Numerous works have been reported based on metal oxides, as they are very effective and efficient adsorbents in the clean-up of environmental contaminants [218][219][220] owing to their small size, which permits them to penetrate into the contamination zone [221,222] where other bulk adsorbents and micro particles cannot.…”

Section: Role Of Nanotechnology: Nano Adsorbents For Heavy Metal Removalmentioning

confidence: 99%

Advances in Methods for Recovery of Ferrous, Alumina, and Silica Nanoparticles from Fly Ash Waste

Yadav

Fulekar

2020

Ceramics

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Fly ash or coal fly ash causes major global pollution in the form of solid waste and is classified as a “hazardous waste”, which is a by-product of thermal power plants produced during electricity production. Si, Al, Fe Ca, and Mg alone form more than 85% of the chemical compounds and glasses of most fly ashes. Fly ash has a chemical composition of 70–90%, as well as glasses of ferrous, alumina, silica, and CaO. Therefore, fly ash could act as a reliable and alternative source for ferrous, alumina, and silica. The ferrous fractions can be recovered by a simple magnetic separation method, while alumina and silica can be extracted by chemical or biological approaches. Alumina extraction is possible using both alkali- and acid-based methods, while silica is extracted by strong alkali, such as NaOH. Chemical extraction has a higher yield than the biological approaches, but the bio-based approaches are more environmentally friendly. Fly ash can also be used for the synthesis of zeolites by NaOH treatment of variable types, as fly ash is rich in alumino-silicates. The present review work deals with the recent advances in the field of the recovery and synthesis of ferrous, alumina, and silica micro and nanoparticles from fly ash.

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Section: Role Of Nanotechnology: Nano Adsorbents For Heavy Metal Removalmentioning

confidence: 99%

Advances in Methods for Recovery of Ferrous, Alumina, and Silica Nanoparticles from Fly Ash Waste

Yadav

Fulekar

2020

Ceramics

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“…known microorganism used for the treatment of wastewater [41,42]. Furthermore, the combination of different technologies enhances the efficiency of environmental remediation [43]. Remote sensing is a recognized tool to monitor the change of water body status (e.g., lagoons, wetlands, and river basins), and Landsat Thematic Mapper (TM), which is an available imaginary dataset, enables us to cross-validate the data taken from the field [19,44,45].…”

Section: Study Sitementioning

confidence: 99%

“…Lactobacillus plantarum is a well-known microorganism used for the treatment of wastewater [41,42]. Furthermore, the combination of different technologies enhances the efficiency of environmental remediation [43].…”

Section: Introductionmentioning

confidence: 99%

Innovative Feasibility Study for the Reclamation of the Cascajo Wetlands in Peru Utilizing Sustainable Technologies

Jindo

Sakura²

2020

Water

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Wetlands are an important feature for our society that provides versatile benefits, such as habitat for diverse wildlife, shoreline erosion protection, flood control, and mitigation of climate change through capture and storage of carbon. The aim of this work was to assess the application of nanotechnologies for the restoration of the water quality in the Cascajo Wetlands, Peru, where the water quality was deteriorated. Ceramic-based bio-filters (CBBFs) were used to reduce and buffer the contamination rates of pollutants, whereas micro-nano bubbles (MNBs) were applied to increase the dissolved oxygen and release free radicals in water. Additionally, bio-fence was implemented to prevent water intrusion from the ocean. Remote sensing data through the Normalized Difference Vegetation Index (NDVI) and the Enhanced Vegetation Index (EVI) was used to monitor the water surface condition. With treatment of CBBFs and MNBs for 13 months, we observed reduction in the chemical oxygen demand (COD), biological oxygen demand (BOD), total nitrogen (TN), and total phosphate (TP) in the water body, showing removal percentages of 98.5%, 97.5%, 98.1%, 98.5%, and 94.6%, respectively, in comparison with values before starting the implementation. The trends of NDVI and EVI over seasons are not completely aligned with the results taken from the wetlands treated with MNBs, CBBFs and bio-fence. While TN was highly correlated with the empirical value of TN based on remote sensing, no correlation was observed between COD and empirical COD. The use of eco-friendly techniques has performed efficiently to remove the pollutant.

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“…Modern civilization suffers from increasing concentrations of elemental pollutants in the environment because of industrialization, agricultural practices, and waste production [1][2][3], and this type of environmental contamination poses one of the largest threats because of toxicity to all organisms. Therefore, methods such as remediation and purification that can alleviate environmental pollution are essential for environmental management [4,5]. Also reuse of wastewater and excreta became a global interest due to the associated risks to public health and the environment [2].…”

Section: Introductionmentioning

confidence: 99%

Improvement of soil properties and plant responses by compost generated from biomass of phytoremediation plant

Song

2019

Environmental Engineering Research

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Phytoremediation is an emerging green technology that uses plants to remediate environments contaminated with toxic materials. However, plants used for phytoremediation in the leachate channel of a sanitary landfill must be harvested and recycled to prevent re-release of contaminants during decomposition. Therefore, experiments were conducted to test the use of the harvested remediation macrophytes, Phragmites australis and Typha angustifolia, as composting material. Compost produced from these macrophytes significantly improved soil conditions, and, for plants grown in soil with macrophyte compost, their performance improved based on chlorophyll contents, a stress evaluation, and increase in biomass. Additionally, the bioaccumulation of contaminants was not high, with the concentrations of some elements even lower than those in the control. The decomposition rate of macrophytes in the semiarid condition of the landfill was slow, but, once composted, plant biomass was more applicable to soil. This macrophyte compost can then also be used as an economical substitute for the commercial barks currently used as co-composting material. Therefore, the composting of remediation macrophytes from the leachate channel of a sanitary landfill for application to soil will help in the sustainable management of both the leachate channels and the soils on the slopes.

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Nanotechnology for Environmental Remediation: Materials and Applications

Cited by 440 publications

References 164 publications

Advances in Methods for Recovery of Ferrous, Alumina, and Silica Nanoparticles from Fly Ash Waste

Advances in Methods for Recovery of Ferrous, Alumina, and Silica Nanoparticles from Fly Ash Waste

Innovative Feasibility Study for the Reclamation of the Cascajo Wetlands in Peru Utilizing Sustainable Technologies

Improvement of soil properties and plant responses by compost generated from biomass of phytoremediation plant

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