Nanotechnology for sustainable development: retrospective and outlook

Diallo, Mamadou S.; Fromer, Neil A.

doi:10.1007/978-3-319-05041-6_1

Cited by 18 publications

(14 citation statements)

References 47 publications

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“…From the steepness of the adsorption isotherm, it can be seen that the mesopore structure is not well ordered and has a broad pore size distribution. In addition, evidence of the occurrence of open pores in the AA is shown by the presence of the hysteresis loop[24].…”

mentioning

confidence: 99%

Competitive adsorption of fluoride and natural organic matter onto activated alumina

Mouelhi

Giraudet

Amrane

et al. 2016

Environmental Technology

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Natural organic matter (NOM) is a major water constituent that affects the performance of water treatment processes. Several studies have shown that NOM can be adsorbed on the surface of oxides and may compete with other ions. The overall goal of this study was essentially to investigate the competitive adsorption between fluoride and NOM on activated alumina (AA). For this purpose, a humic acid (HA) was used as a model compound for NOM. The interaction of NOM with fluoride, the simultaneous competitive adsorption, and the effect of preloading AA with NOM were investigated. The specific absorbance of HA was determined at 254 nm. Size-exclusion chromatography measurements confirmed the adsorption of aromatic fractions of NOM onto AA. The presence of HA in the system inhibited fluoride sorption onto AA and the removal yield using fresh AA decreased from 70.4 % to 51.0 % in the presence of HA. The decrease was more pronounced using AA preloaded with HA, reaching 37.7 %. The interference of coexisting ions and their effect on fluoride removal capacity were evaluated, showing a severe impact of the presence of phosphate on the removal capacity unlike nitrates and sulfates, which slightly improved the fluoride sorption.

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confidence: 99%

Competitive adsorption of fluoride and natural organic matter onto activated alumina

Mouelhi

Giraudet

Amrane

et al. 2016

Environmental Technology

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“…(1) sustainable design and synthesis of nanostructures; (2) new generation technology using functionalized nanostructures to remove contaminants from water, air, and soil; (3) sensor design for the estimation and quantification of pollutants; (4) study of toxicity and evaluation of environmental and health implications associated with the use of nanostructures for remediation; (5) emerging solutions [5,14,15].…”

Section: Nanotechnology and Nanostructures Classificationmentioning

confidence: 99%

Low Dimensional Nanostructures: Measurement and Remediation Technologies Applied to Trace Heavy Metals in Water

García-Betancourt¹,

Jiménez²,

González-Hodges³

et al. 2021

Trace Metals in the Environment - New Approaches and Recent Advances

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A nanostructure is a system in which at least one external dimension is in the nanoscale, it means a length range smaller than 100 nm. Nanostructures can be natural or synthetic and determine the physicochemical properties of bulk materials. Due to their high surface area and surface reactivity, they can be an efficient alternative to remove contaminants from the environment, including heavy metals from water. Heavy metals like mercury (Hg), cadmium (Cd), arsenic (As), lead (Pb), and chromium (Cr) are highly poisonous and hazardous to human health due to their non-biodegradability and highly toxic properties, even at trace levels. Thus, efficient, low-cost, and environmentally friendly methodologies of removal are needed. These needs for removal require fast detection, quantification, and remediation to have heavy metal-free water. Nanostructures emerged as a powerful tool capable to detect, quantify, and remove these contaminants. This book chapter summarizes some examples of nanostructures that have been used on the detection, quantification, and remediation of heavy metals in water.

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“…Similarly, nanotechnologies are advancing in many other fields to solve essential issues of health [10], agriculture [11], energy and resources [12], as well as environmental and climate protection [13]. However, for the implementation of many nanotechnological fabrication techniques, there is a lack of adequate measuring and positioning techniques that span scales of subnanometers to several centimeters.…”

Section: Introductionmentioning

confidence: 99%

Tip- and Laser-based 3D Nanofabrication in Extended Macroscopic Working Areas

et al. 2021

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The field of optical lithography is subject to intense research and has gained enormous improvement. However, the effort necessary for creating structures at the size of 20 nm and below is considerable using conventional technologies. This effort and the resulting financial requirements can only be tackled by few global companies and thus a paradigm change for the semiconductor industry is conceivable: custom design and solutions for specific applications will dominate future development (Fritze in: Panning EM, Liddle JA (eds) Novel patterning technologies. International society for optics and photonics. SPIE, Bellingham, 2021. 10.1117/12.2593229). For this reason, new aspects arise for future lithography, which is why enormous effort has been directed to the development of alternative fabrication technologies. Yet, the technologies emerging from this process, which are promising for coping with the current resolution and accuracy challenges, are only demonstrated as a proof-of-concept on a lab scale of several square micrometers. Such scale is not adequate for the requirements of modern lithography; therefore, there is the need for new and alternative cross-scale solutions to further advance the possibilities of unconventional nanotechnologies. Similar challenges arise because of the technical progress in various other fields, realizing new and unique functionalities based on nanoscale effects, e.g., in nanophotonics, quantum computing, energy harvesting, and life sciences. Experimental platforms for basic research in the field of scale-spanning nanomeasuring and nanofabrication are necessary for these tasks, which are available at the Technische Universität Ilmenau in the form of nanopositioning and nanomeasuring (NPM) machines. With this equipment, the limits of technical structurability are explored for high-performance tip-based and laser-based processes for enabling real 3D nanofabrication with the highest precision in an adequate working range of several thousand cubic millimeters.

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Nanotechnology for sustainable development: retrospective and outlook

Cited by 18 publications

References 47 publications

Competitive adsorption of fluoride and natural organic matter onto activated alumina

Competitive adsorption of fluoride and natural organic matter onto activated alumina

Low Dimensional Nanostructures: Measurement and Remediation Technologies Applied to Trace Heavy Metals in Water

Tip- and Laser-based 3D Nanofabrication in Extended Macroscopic Working Areas

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